Desktop Browsers(default settings) |
brave 1.73 |
chrome 131.0 |
duckduckgo 1.118 |
edge 131.0 |
firefox 133.0 |
librewolf 133.0 |
mullvad 14.0 |
opera 115.0 |
safari 18.1 |
tor 14.0 |
ungoogled 131.0 |
vivaldi 7.0 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
State Partitioning testsWhich browsers isolate websites to prevent them from sharing data to track you?
A common vulnerability of web browsers is that they allow tracking companies to 'tag' your browser with some data ('state') that identifies you. When third-party trackers are embedded in websites, they can see this identifying data as you browse to different websites. Fortunately, it is possible for this category of leaks to be fixed by partitioning all data stored in the browser such that no data can be shared between websites. |
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Alt-Svc
Alt-Svc allows the server to indicate to the web browser that a resource should be loaded on a different server. Because this is a persistent setting, it could be used to track users across websites if it is not correctly partitioned. |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3 result, different first party: h2 unsupported: false passed: true test failed: false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported result, different first party: h2, h2 unsupported: true, true passed: undefined test failed: false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
blob
A 'blob URL' is a local reference to some raw data. Trackers can use a blob URL to share data between websites. |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: Error: NetworkError when attempting to fetch resource. unsupported: false passed: true test failed: false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
BroadcastChannel
A BroadcastChannel is designed to send messages between tabs. In some browsers it can be used for cross-site communication and tracking. |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: Error: no BroadcastChannel message unsupported: false passed: true test failed: false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
CacheStorage
The Cache API is a content storage mechanism originally introduced to support ServiceWorkers. If the same Cache object is accessible to multiple websites, it can be abused to track users. |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: Error: cacheKeys[0] is undefined unsupported: false passed: true test failed: false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 94cc93cc-dc90-4984-a54b-124aac75e1f6, 94cc93cc-dc90-4984-a54b-124aac75e1f6, 94cc93cc-dc90-4984-a54b-124aac75e1f6, 94cc93cc-dc90-4984-a54b-124aac75e1f6, 94cc93cc-dc90-4984-a54b-124aac75e1f6 result, different first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd_http, d86dd658-0ff2-4870-ab05-f3bb419a9b69_http, a4208d20-99b0-4e14-8a6f-62eda848d435_http, 0fc43b05-93de-4898-990f-5d0352927a8d_http, 62edda60-1774-48e0-b6e1-52259766cca0_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161_http, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_http, 558012cd-bf8c-453c-b0fc-6ceaea887a41_http, dbc600f4-7b97-4314-a4c7-ce77a826aad5_http, 3830852b-eaf9-49ee-9612-368175afa763_http result, different first party: 53f07b6a-da16-4de8-82b2-3bca13302161_http, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_http, 558012cd-bf8c-453c-b0fc-6ceaea887a41_http, dbc600f4-7b97-4314-a4c7-ce77a826aad5_http, 3830852b-eaf9-49ee-9612-368175afa763_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9_http, a82d652a-6589-458f-9d2e-3f853727d44e_http, 7583f0bf-a71e-4c3d-b33e-576800b48639_http, 049569cf-35a2-40d3-b505-48ba427a935c_http, 2953b826-4eff-4890-99c8-bc5fa7037c23_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3_http, e2dad053-92dc-4c83-9e12-04c860fec5de_http, 61430277-80cf-48b3-80d9-237145c0d8e7_http, a7a04a2f-1201-457e-95aa-b3e5d802c26e_http, 2babac8c-264d-48db-9b44-49b8dd8b969a_http result, different first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3_http, e2dad053-92dc-4c83-9e12-04c860fec5de_http, 61430277-80cf-48b3-80d9-237145c0d8e7_http, a7a04a2f-1201-457e-95aa-b3e5d802c26e_http, 2babac8c-264d-48db-9b44-49b8dd8b969a_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17_http, b842620f-65bb-4ec2-b89b-888354862fbc_http, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_http, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_http, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64_http result, different first party: null unsupported: false passed: true test failed: false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78_http, 0eae6060-999a-4f32-97b0-7df902d381d5_http, 198c8c95-9749-4613-a374-435273ec30c0_http, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab_http, 7659c04b-f0f0-47cc-98a4-b9efc7731164_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b_http, d8ac5859-fdee-4da8-acc0-87a464f5b23d_http, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_http, 19b61752-c8c9-426e-8bc1-e57591cb6549_http, 3d284730-6018-4426-9233-ba55b5edacf4_http result, different first party: ae90fe05-7add-4506-b4a6-05b0ff09727b_http, d8ac5859-fdee-4da8-acc0-87a464f5b23d_http, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_http, 19b61752-c8c9-426e-8bc1-e57591cb6549_http, 3d284730-6018-4426-9233-ba55b5edacf4_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44_http, 67391a77-7359-4b4a-a575-5d0865e50d35_http, 088c23ed-84e6-4f82-b80d-551047c771c6_http, 9ea653f5-2526-438c-9505-018f36179296_http, ae4a2f97-fe22-43c5-8804-f82922e7afec_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276_http, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3_http result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543_http, 59aa2d42-8262-4767-99e3-384619556b91_http, 484acdad-25bb-4433-94b1-6c16d4fd390e_http, bfc3994e-661e-4006-b356-b10ee5d44de5_http, 50851283-1da0-4339-927f-2aa4fdc2fc6e_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669_http, affb069f-fe25-4ffe-9450-ebb304b44fba_http, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_http, b8d656a3-d542-43f6-86e8-0b843648eb8d_http, 8b37f004-4d17-4386-a388-9cfc59051659_http result, different first party: 204fbf6e-3b84-4138-b1da-b71b5d502669_http, affb069f-fe25-4ffe-9450-ebb304b44fba_http, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_http, b8d656a3-d542-43f6-86e8-0b843648eb8d_http, 8b37f004-4d17-4386-a388-9cfc59051659_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd_js, d86dd658-0ff2-4870-ab05-f3bb419a9b69_js, a4208d20-99b0-4e14-8a6f-62eda848d435_js, 0fc43b05-93de-4898-990f-5d0352927a8d_js, 62edda60-1774-48e0-b6e1-52259766cca0_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161_js, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_js, 558012cd-bf8c-453c-b0fc-6ceaea887a41_js, dbc600f4-7b97-4314-a4c7-ce77a826aad5_js, 3830852b-eaf9-49ee-9612-368175afa763_js result, different first party: 53f07b6a-da16-4de8-82b2-3bca13302161_js, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_js, 558012cd-bf8c-453c-b0fc-6ceaea887a41_js, dbc600f4-7b97-4314-a4c7-ce77a826aad5_js, 3830852b-eaf9-49ee-9612-368175afa763_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9_js, a82d652a-6589-458f-9d2e-3f853727d44e_js, 7583f0bf-a71e-4c3d-b33e-576800b48639_js, 049569cf-35a2-40d3-b505-48ba427a935c_js, 2953b826-4eff-4890-99c8-bc5fa7037c23_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3_js, e2dad053-92dc-4c83-9e12-04c860fec5de_js, 61430277-80cf-48b3-80d9-237145c0d8e7_js, a7a04a2f-1201-457e-95aa-b3e5d802c26e_js, 2babac8c-264d-48db-9b44-49b8dd8b969a_js result, different first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3_js, e2dad053-92dc-4c83-9e12-04c860fec5de_js, 61430277-80cf-48b3-80d9-237145c0d8e7_js, a7a04a2f-1201-457e-95aa-b3e5d802c26e_js, 2babac8c-264d-48db-9b44-49b8dd8b969a_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17_js, b842620f-65bb-4ec2-b89b-888354862fbc_js, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_js, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_js, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64_js result, different first party: null unsupported: false passed: true test failed: false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78_js, 0eae6060-999a-4f32-97b0-7df902d381d5_js, 198c8c95-9749-4613-a374-435273ec30c0_js, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab_js, 7659c04b-f0f0-47cc-98a4-b9efc7731164_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b_js, d8ac5859-fdee-4da8-acc0-87a464f5b23d_js, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_js, 19b61752-c8c9-426e-8bc1-e57591cb6549_js, 3d284730-6018-4426-9233-ba55b5edacf4_js result, different first party: ae90fe05-7add-4506-b4a6-05b0ff09727b_js, d8ac5859-fdee-4da8-acc0-87a464f5b23d_js, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_js, 19b61752-c8c9-426e-8bc1-e57591cb6549_js, 3d284730-6018-4426-9233-ba55b5edacf4_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44_js, 67391a77-7359-4b4a-a575-5d0865e50d35_js, 088c23ed-84e6-4f82-b80d-551047c771c6_js, 9ea653f5-2526-438c-9505-018f36179296_js, ae4a2f97-fe22-43c5-8804-f82922e7afec_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276_js, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3_js result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543_js, 59aa2d42-8262-4767-99e3-384619556b91_js, 484acdad-25bb-4433-94b1-6c16d4fd390e_js, bfc3994e-661e-4006-b356-b10ee5d44de5_js, 50851283-1da0-4339-927f-2aa4fdc2fc6e_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669_js, affb069f-fe25-4ffe-9450-ebb304b44fba_js, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_js, b8d656a3-d542-43f6-86e8-0b843648eb8d_js, 8b37f004-4d17-4386-a388-9cfc59051659_js result, different first party: 204fbf6e-3b84-4138-b1da-b71b5d502669_js, affb069f-fe25-4ffe-9450-ebb304b44fba_js, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_js, b8d656a3-d542-43f6-86e8-0b843648eb8d_js, 8b37f004-4d17-4386-a388-9cfc59051659_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported result, different first party: Error: Unsupported unsupported: true passed: undefined test failed: false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported unsupported: true, true passed: undefined test failed: false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_4538058831244758, fake_16561500508115956, fake_2690730823760661, fake_5376876349375437, fake_8922254554785445 result, different first party: fake_1888079957868014, fake_986789319358925, fake_1459951513796467, fake_19950066711337766, fake_38100428355438365 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_5538858975920207, fake_19569361180778788, fake_8517936030456783, fake_31313762789419974, fake_3353782666495997 result, different first party: fake_35134572505612427, fake_5754988411397266, fake_8691191943047136, fake_6927862132220168, fake_34655628729755494 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_5439258495506787, fake_5825899726880404, fake_48587260364346374, fake_6526481554073247, fake_8341809038431656 result, different first party: fake_949160052481959, fake_3265395785384062, fake_15993981280625502, fake_4123427955827428, fake_49523590099272075 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_6055205713709535, fake_542637925047728, fake_2950120038013797, fake_5254233705223068, fake_7290365959157528 result, different first party: fake_8627970235316256, fake_5936943914365715, fake_428239460682035, fake_7709511507466387, fake_6796672955692336 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_3039591554896146, fake_8053565065333685, fake_1975290972498993, fake_9291675254957292, fake_7208545299993077 result, different first party: fake_3561795819599147, fake_2688208638628442, fake_4240161734283794, fake_5927585456190934, fake_4480403312419263 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_9856592515792721 result, different first party: fake_004291445759349033 unsupported: false passed: true test failed: false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_8611224152828039, fake_5250612371404226, fake_019896928063715347, fake_26488128880761597, fake_26279725951941013 result, different first party: fake_5916197645123042, fake_4514899719248573, fake_6240479290047065, fake_026772715744990183, fake_0200706127725665 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_8502038531885086, fake_2861163550044221, fake_6384540292808987, fake_7521352585477203, fake_17718896771579962 result, different first party: fake_24219775358957474, fake_8461247275515615, fake_2043720859668261, fake_11207021128761485, fake_8240898384223345 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_496012089736555, fake_043470630094450735, fake_41972723159482017, fake_6093252136214551, fake_7033920864417373 result, different first party: fake_8400994358922991, fake_10653526618112874, fake_9132844185997495, fake_5794045905659508, fake_7767595573862944 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_9968342701788744, fake_9117704584201449 result, different first party: fake_13482270920988326, fake_1525520278849697 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_6476591462023855, fake_9041206352792157, fake_5682036808822886, fake_6851638967583222, fake_7992759984284612 result, different first party: fake_8333176758452023, fake_2653032045466641, fake_18838065029182793, fake_8613120922079285, fake_20296259626405888 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_6600115973088678, fake_2191939667013052, fake_4807919164298393, fake_5114241418616143, fake_015415401113273663 result, different first party: fake_051749310990556685, fake_8881475813434385, fake_03625866518978493, fake_7960003315273898, fake_18359984003277097 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
favicon cache
A favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites. |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
fetch cache
When a resource is received via the Fetch API, it is frequently cached. That cache can potentially be abused for cross-site tracking. |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
getDirectory
navigator.storage.getDirectory exposes a location for storing files to web content. In some cases, these files may be shared across tabs. |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: , , , , result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: Error: Unsupported unsupported: false passed: true test failed: false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: , , , , result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported unsupported: true, true passed: undefined test failed: false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
H1 connection
HTTP/1.x are the classic web connection protocols. If these connections are re-used across websites, they can be used to track users. |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: unsupported: false passed: true test failed: false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, , bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true test failed: false, false, true, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
H2 connection
HTTP/2 is a web connection protocol introduced in 2015. Some browsers re-use HTTP/2 connections across websites and can thus be used to track users. |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: unsupported: false passed: true test failed: false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, , bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true test failed: false, false, true, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
H3 connection
HTTP/3 is a new standard HTTP connection protocol, still in draft but widely supported by browsers. If it is not partitioned, it can be used to track users across websites. |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: d28539e1b067456c28be48e8adaca846, 1949683d80d3b91462e340160c2c7220, 0da437d10008627580a976481543f16f, 1b4c86d073199e3205715117287d67b4, ba915acb648eb766cb17277a4c930447 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 6a6ad247880de164e0ad60eeb2ebc179, b9536ee820a8ec71fb02b3361a6a8d85, b22c23683dfbb66982cd88312e509ad1, 8f71e577b97c4991e9b6acb7325d21cf, b728cb92291c2bed44b28a9a73e08670 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: , 3afc7a502a159bf3162aa5379a8a0e52, 8bc3c11c24cceeed93405192432721c7, 2b849671ee73a312ce92bb54fdc973b2, 0894861a777c7e432df3c99b448c8025 result, different first party: , d661e17182504575f55d55ada1ee87a4, 69249fd0030494d9be677efaf2ee491a, 5aa1c16c161e1aa3178891d1c7a3e2c1, e17b3e53a8ae8f6f0302472a9ed187e0 unsupported: true, false, false, false, false passed: , true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 6a6786d820df8b051124ae8d352dceb5, 4b39eaa54ed3118233192b75a8daecb4, 928361a11d4a88ef12959fbae60a4a06, 9a77a385b7c33360841fb897e1d48036, 5c4df4eab4068095e72e3998f5029074 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 8f5ea1ccb789f17a59823abb59672061, ad2244c45401641faf7c5b754faa0c0b, f0370f51fa8a9fd34e75c6a7fe95fa5d, 34eb3179632bb95a7fc843d106c489c4, 233a8c4ca81e8b5b36d2193f7a9767a3 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 4396540299dc3fc27ac3d204869793eb result, different first party: unsupported: false passed: true test failed: false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 3f6a8e7f5aeb6e7eea057706d95eeb5a, e5384836d2dfa38d522b0d2ce05261df, 6cbc7122f410557ee831096a070fa5e2, 2951474dbe7c2dae88623c984e82ab2f, a5308b53573e02991e9bf5b77938ba7d result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 397d2c369cfa2f21ab30ff06b15736cd, cd2476112001398ebea69e480ac43b9b, 8f395f6a43dfeb2c98668735f85ee702, 00bf7642349945d66f78a35362953c56, f98cdec6543587fe0a5dc5a5c79d2df4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: , result, different first party: , unsupported: true, true passed: undefined test failed: false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 503ab2324d753a5b0b9b70d38fb77255, 7f36b65ad1ebd087efb5b49a3a4ec4ab, 92d68baedc47bb05790fadc53f2cb5c1, d222576bc1754f3cbcd099296b475d52, 6769b0b2a3d151383f43950574d741b0 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 3d0b2597297ced08ee004a8ada2e1b9d, 975d9f5f510254efeaef6ad1526d5599, ed3d3f55266205ea860f6387d0d02186, d9f417ad9183830a4e8e37eba21391df, 5923df9e10e33cf48923c6faebb626f9 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
HSTS cache
The HTTP Strict-Transport-Security response header allows a website to signal that it should only be accessed via HTTPS. The browser remembers this directive in a database, but if this database is not partitioned, then it can be used to track users across websites." |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: null result, different first party: HTTPS used by default; no HSTS cache issue expected unsupported: null passed: true test failed: false |
write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , passed: true, true test failed: false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
HSTS cache (fetch)
The HTTP Strict-Transport-Security response header allows a website to signal that it should only be accessed via HTTPS. The browser remembers this directive in a database, but if this database is not partitioned, then it can be used to track users across websites." |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: null result, different first party: HTTPS used by default; no HSTS cache issue expected unsupported: null passed: true test failed: false |
write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , passed: true, true test failed: false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
iframe cache
An iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
image cache
Caching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
indexedDB
The IndexedDB API exposes a transactional database to web pages. That database can be used to track users across websites, unless it is partitioned. |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: undefined unsupported: false passed: true test failed: false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
localStorage
The localStorage API gives websites access to a key-value database that will remain available across visits. If the localStorage API is not partitioned or blocked, it can also be used to track users across websites. |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: null unsupported: false passed: true test failed: false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
locks
navigator.locks (only supported in some browsers) allows scripts on multiple tabs to coordinate. If this API is not partitioned, it can be used for cross-site tracking. |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: Error: LockManager.query: query() is not allowed in this context unsupported: false passed: true test failed: false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name'), Error: undefined is not an object (evaluating 'queryResult.held[0].name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name'), Error: Cannot read properties of undefined (reading 'name') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
prefetch cache
A <link rel='prefetch'...> suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites. |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received result, different first party: Error: No requests received unsupported: true passed: undefined test failed: false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received unsupported: true, true passed: undefined test failed: false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
script cache
Caching of scripts in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
ServiceWorker
The ServiceWorker API allows websites to run code in the background and store content in the browser for offline use. If a ServiceWorker can be accessed from multiple websites, it can be abused to track users across sites. |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: result, different first party: unsupported: false passed: undefined test failed: true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true passed: undefined test failed: false, false |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
SharedWorker
The SharedWorker API allows scripts from multiple tabs to share a background thread of computation. If SharedWorker is not partitioned, then it can be abused to shared data between websites in your browser. |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: Error: Unsupported unsupported: false passed: true test failed: false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: Error: SharedWorker constructor: StorageAccess denied., Error: SharedWorker constructor: StorageAccess denied., Error: SharedWorker constructor: StorageAccess denied., Error: SharedWorker constructor: StorageAccess denied., Error: SharedWorker constructor: StorageAccess denied. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: Error: SharedWorker constructor: StorageAccess denied., Error: SharedWorker constructor: StorageAccess denied. unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
TLS Session ID
The TLS protocol is used by HTTPS to make connections secure. If the browser were to re-use a TLS session, then the session ID could be used to track users across websites. |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: bb2a4dfe26a7ccaf60ccc858cf41bdcbaf76c0d055b5f074f455abf946ccd35a, 1b1e9211906f761b9d3b543b0bb79891a405665a67634a46386fabd9575a1f5a, 4f4711565cea09ae35d6304f0b23efbef3b4df5141501e815cd3db0675b89b01, af8fc7934cdbdf6f4d06ad8a895f152667034460768f9a9379e30ce85df7706f, 8ee4067a10b3e649c998c468689339bc8f09f3767611ffd59c851ced66cf8197 result, different first party: e881faaeb63b77aaedb4c3d5dcd18bd8147bd16bcca7b7ebc50105927e0f0b17, 380e0be872e6daaf0d0e35421a87f472d185cf2e4e40a6d4b6ac1001b590079e, d4e5dc594e4ce13b7ba1e3608b6e672538025293796860b81e07e87f0a57d2c5, 546cf51e5b908fbfc1735b89ccb68a7c8245239f4bc1a409774f6f5a7072a52d, 41c8d05b7e0a843015a2a0bb51f448e7d111f54f005f96c0431b915784e7359d unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: f69c871edd9935d3f9504d7471bdcdc69755bbeb4cc9bc06f13d697b1eaab1dc, e070ce716ba3b3ce069b45075b226403f741351e21087f6300d5589fdafa942f, d23b3285bbd9beebf22bfac00227190628324254ca3ded8aec1f7d02a94b175a, fcd819f2f9b3c036141d2a49b48ec8b1e52d7f47d988aeee34c3389fffc94c81, 5263021e897b3413ea849b081f2b92dfa034fe6f27c0b8681834140cc57d4151 result, different first party: 8c3d8a002e3855b669269df596cb5243f4abb9c4d7e8121b9ccfe2456512e6ab, 0c8793c2241c223d71acf0aa33a493e681c0ffc3364ac90294dc53ea82c3d49a, 50f49ab7877f93e9bf775696dc1f707d33b331a09c31505c416d24a24aa49003, f2e47a9fccfc421d65985f773c021f85b8f73c3127c00cbbed7a6d31089cde84, ff0927242248b6a0d0ce901b0ec0e5b00c5ada2b543221d2abeb38e1df657619 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: 01172d2c1420c0af5b1a218dac9a818dbe0b0ec99e73b3e08fba1248aad96cd0, 28b7b19a3baa78e231d470af09c52cfca9794dd545e330e8d6e7b66731c6e0b9, 96d0f5223bfbfd9b2f17f8c9e4cb7d3ae7fa90de108990ba7fcee32adb330433, e59897685ced547a3e33ee7efa188f433fcfee95813f389cb57a6f937c7a49f1, 2e9067d8cb921b6040106a4dd2ae6c366af59bff7fab1eaf686779355fc01f5e result, different first party: c427ffbbc567b8dadd176b4b8ab8fdb1e641e8821cbbb3a6f3c6da8c0622e45b, 5a746590e09d0e2486010e66b61234bd25227111434cf33d68694f7345330243, 0628ee91dc7b543c56cff2b57e27bc66e2888b2fd9c63dcc3fbca5d05464aab5, 9aabd4efcdd00fd97ecd9edfcdb4e71dbc9e2254b582c5d50f31e21a093c1ae6, b50f103fd24708eb38d977896fd679bacfe37c15e5778ea6c81dfc95cd65dfbd unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: 54b86e7534e675934161cd291c59adc9d6eb21b9e2b4afcbd44056f58e0a4827, 21a6cc0ab4ee7f5f9181f91e587356de9b3a71941ee2b67a3e5ea434328c69d1, 850e6eee9ed16c82961eb9f88a13cb1c24795fca1b4fc303b25ff3848141acf0, 4b80aa1545489bcd1a126b6d2242f1a475105ace20ec9d3e08bb785e2aeef102, d574fbc28a55b3efb6f22503457465b258528358dc37370f2118e4360cf976c4 result, different first party: aecece97dc263f2cb447234cb0d9aa083817412153ac398e8abcc6181ea3419c, d04c1a8a083e8326e8ea39080928306e148da5b5eed58824a6e3e55b5771aafe, 3703c0e45afa634b90bebdaf4220b54ea3baa11c5a151c7dc25aab08fe03882c, 8d8e3328b7b85855d223ddc82697f35b82ac3522f90f9bfceee6f405672126d4, 8bc28c3efa18f12c681cb47481c37e6f4c8e43f9d3b0b1f45913a869c3912a86 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: 72b7b4ec75ec94e1599d12942f8d51759405a207a766af021462ddf9e0e9d2c2, 019262748c5569ea1278a84429f663804a829af8b8e4b561850150ac889d71a1, 6722d9b6c6759e9fb95595cf42d820edbdf0875965b1a1b1376b2feaa004b5f4, 97dffb829c3c90dc79992a25e4f7b6bf5090e9c1d75dd4b5a41b8f061c527715, 5e14f5781d48b7dfbba57c3a295ddcfcea41591447a5251d1f5efb1c27966dfc result, different first party: ec19b014a9cb4e8519faa08fea1238fd43744af7084dc82fe15cf7280a134599, fbf7adc4818fbc7eb4277c62153334cddfc8fd4cfec5efe68157f322cccc4ed6, 761287be1be58220024729e5dcb8531a4101ad2aa9321c562fc41dcc87c0abfa, c62da1726f97ad6804a5d32ce0b0a92bc5a1c6287e0fefaa63cb8cbd0b18872a, b09b3edadf8d5f77f4666cff0c2f60c05d183a5886fac0a57e31c14f95e595ed unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: a1425047be3e5703e4c3cdc8263cb330ef07af1dedc0aa80aa5e8782863dd9e3 result, different first party: 2fcf6ecc4c724e43644c2451c2be8be47d703c6b768e56ac659e48299da53c43 unsupported: false passed: true test failed: false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: f53b37bf2f25197d62dc24b42fd01007c6e2459af715f240a8cfab6e11a30a8f, db9d9903f58f015a74b4d4022ec99b399fbceed2c607d9b565075eddab9250a2, 43a8e5f89b73898002e6ca91b4f194ccaf5f0b5f2746f39ebc615692e49cc47f, 2a06a3283bf8089474c3fc6740f0767661c85a2d9b45360a59d72eff33dadafc, bc56f87b4f7850940c5188f43868e6768420380b0949f0aea7662f7638dea892 result, different first party: f3ef93989f5ff04b1681bde6b2abbdcb7defcda841d167e28f9d6c7051d38c58, d2e71bb75ae91f726e21485f04ff4f1ad0c8ed2880fc1a1c900f054126857875, b3a173a69848162bafcbd7b634ae3f082eb3beaf622ab0983afad50f67d6d1e4, 329dcb1ee69ef58993b2270c3ea883ea8722bd071f91b82d6a4f450c5cdb3110, 07a1140c28188471b8e9dd1f0dba8bad470e97f4b1062aaa9de8d5d40b2f8029 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: 3c75e70cf1a979e66fcee0a8d98e352b44e4419a46dda0106f86483ccebf3bac, 3e761d703484ea397d9553007d142bae4ce08d66f83d35ae7264e48bff81ce9f, 59e33553aa09623834b58e8715f4d2e02a3e81847ac8fcf6ab8d2d7c30552507, 60f3b4d59d3dfdd73e0186eb4377d45a7f6df25590dffb3c0580f65cbef0bdfb, 78e30543a06cee51305620f9cce65f9857077776b0706088fea9dcd6972e8e12 result, different first party: fdbcb9ae7d1d37f40917a9f1aa8fa1667e34a954f1fede66b6f824608fc40986, cc4f05911071079ebc9c70c80ce97ac475a41c9ed2db211049a8053c84cf1b7a, 799903d7487da31c2b4a862d012dafdf983c1c5a8b7083073aa8a2389c6fb6b7, 7200f31c5117e83dc43f6446b4b2b3cbac7f11ae9949d6a1ab145fec815a804b, 74754141e35453e9b9e9a12cfe1812b76ce529dd554f2540c0097461a9a7404f unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: d7d4315c8dfa51bd61ad18e620a69f00d9313853eb69113cb9db0e082c27bd07, efcc64e0f9d90632cccce949a8c7495180621fbee947f16c15c69f70d6c8030a, e108996fdbffa9cfbffb08d600bb1d36bc48efbba0f7739b48adee035e3cc2b4, 30b4675494498dab2657e31e1f1052a7bdb6ad77efc7dcfcfe76621c1c8f1497, b5f7b4771b8746ce29f20aeb974ba0f581387f4d2e8c1a0476c89f2345536bdd result, different first party: 430d4fe3c95872d5af2c31f6fa9deedba40e71929e1b25b1c6cf60f7e1b93740, 45cd11de750c35e549297b7c45665c96a51f03eff2a16c4f7fe0ba39aba4c216, 34be5bf759d18d2dfbf03064325db22f888921fdbe7469fac70e78da7e1b3169, 55531361b12b470000c40184d739d61844709390142a63f2336279417f433c13, b502800b10ddc5b4aa9ce82b7f9eeb85d84ff864be2362b3378d63f757f39da5 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: a475a979ac52e06b251bf3cc18d295fe027829c6e56c15434cdbcdc52a6404a0, b9c3de9d4293361c03ab3b6970451620162a98fb6484d380d462bda45e0e1176 result, different first party: 6119699ff41d3d0e9ced5def27f1169c0f70a932eed0f6416091415b6218a27b, e77eb8564de175132a0a47b854f124257efdd0dc28ebab94a6b6a7cbe823fbb1 unsupported: false, false passed: true, true test failed: false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: d47acf430b7931268a3d6e057b25915a2371b32befa42445e784bf4ca0d6b05d, 9237fa6de8bef28fab6e6a10d7c8a97f11b55cf74ff3be350297974bd1de0962, 96cdd6764c35ad6520ce60d2a3e06e001a7adfb416ed7a2e04378a4902026833, 2c6d002b94fc463463aeec4aec66104fa270ff098633a71524b5a8d2a2729674, da20b9bd3a4eff908513cf9a1a9fca467fe5342d04bff8c5521ffab910567d31 result, different first party: 03f1d40bdf1ceec71397f518757b9ab40317af759ed532a46ad9e38a77ac3d34, ea33e77beafe05630ea5642a105a13a6fd9d6f3439e92d0f14c2d28539f1a85f, 94ad2596427b34399c21d39ed6be64cb38b2d541558958995031992f68a1ca78, 68d17b83deb025b463a54ae9efb012e6d39e33370e19d13c10871856e97e62e0, 1da03bd708e9098853914474d32ed2a7311d9241f4bb1c7eebc89b488864de1b unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: 446bff982d351009689fdf893ac3acb9fa19f47e5717ea2a27c784a4cdc66b93, 28bb451a8329b825d0a35d523deeabdd036f1896d6c98794b2c7dbaa81e7c08f, bf041ca4494d425456fad59cbed03dcf5c62d54f75758864b50eb2f7c16f6af7, 8c37e658049952cd4d0d7952627721cec3145b81778873593c6520ec78db715b, e274d4f6d9001e416caba39bb621621273a58e07a22c54b170813a3a8196ae0b result, different first party: 5f73e744cd44a027984047f61a6b40137ffe4f9cc03f727426b2f21d242c5862, aa785082957d5bc8b383cc493b80cd8199357c5d96c0e14f1860de15cc1f561e, 059ad79351ed7d22a602a5a20acc484c7716508838c1d64530af24490d40954c, 92a4a21e03dd1cba296dd18435f392b959228312682c0b3940f186a64dac645e, 651b27ed9552b68b1f9d7ea45362bdc5cfbbad81c5cde381a3f71ef8419ac7fc unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
Navigation testsWhich browsers prevent websites from sharing tracking data when you click on a link?
When you click a hyperlink to navigate your browser from one site to another, certain browser APIs allow the first site to communicate to the second site. These privacy vulnerabilities can be fixed by introducing new limits on how much data is transfered between sites.', |
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document.referrer
The Referer [sic] request header is a mechanism used by browsers to let a website know where the user is visiting from. This header is inherently tracking users across websites. In recent times, browsers have switched to a policy of trimming a referrer to convey less tracking information, but Referer continues to convey cross-site tracking data by default. |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/ unsupported: false passed: false test failed: false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false passed: false, false test failed: false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
sessionStorage
The sessionStorage API is similar to the localStorage API, but it does not persist across tabs or across browser sessions. Nonetheless, it can be used to track users if they navigate from one website to another. This tracking can be thwarted by partitioning sessionStorage between websites. |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 97c426b7-b359-4b08-b700-c379123eadbd, d86dd658-0ff2-4870-ab05-f3bb419a9b69, a4208d20-99b0-4e14-8a6f-62eda848d435, 0fc43b05-93de-4898-990f-5d0352927a8d, 62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 53f07b6a-da16-4de8-82b2-3bca13302161, cf5b2e6b-a78d-45cb-b7ea-433c997f365f, 558012cd-bf8c-453c-b0fc-6ceaea887a41, dbc600f4-7b97-4314-a4c7-ce77a826aad5, 3830852b-eaf9-49ee-9612-368175afa763 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: bda42e9e-2ddc-4bfe-8436-749862b310a9, a82d652a-6589-458f-9d2e-3f853727d44e, 7583f0bf-a71e-4c3d-b33e-576800b48639, 049569cf-35a2-40d3-b505-48ba427a935c, 2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 3e380705-3e60-4543-80d4-6abfc3aa00f3, e2dad053-92dc-4c83-9e12-04c860fec5de, 61430277-80cf-48b3-80d9-237145c0d8e7, a7a04a2f-1201-457e-95aa-b3e5d802c26e, 2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: a39c5346-059d-4510-82d8-8bfea461cc17, b842620f-65bb-4ec2-b89b-888354862fbc, 36351bfd-bc1c-4c77-8d91-d8174c0158fc, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, 860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: null unsupported: false passed: true test failed: false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: fdfdb499-12ca-4871-a79c-78f8a3299a78, 0eae6060-999a-4f32-97b0-7df902d381d5, 198c8c95-9749-4613-a374-435273ec30c0, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, 7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: ae90fe05-7add-4506-b4a6-05b0ff09727b, d8ac5859-fdee-4da8-acc0-87a464f5b23d, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf, 19b61752-c8c9-426e-8bc1-e57591cb6549, 3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: e9ea0ac4-a45d-421f-961c-6e9e14000a44, 67391a77-7359-4b4a-a575-5d0865e50d35, 088c23ed-84e6-4f82-b80d-551047c771c6, 9ea653f5-2526-438c-9505-018f36179296, ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 879bc8c2-d90f-4352-8c40-3e021923c276, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 97ead046-45c5-401d-b63c-5ccc239dd543, 59aa2d42-8262-4767-99e3-384619556b91, 484acdad-25bb-4433-94b1-6c16d4fd390e, bfc3994e-661e-4006-b356-b10ee5d44de5, 50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 204fbf6e-3b84-4138-b1da-b71b5d502669, affb069f-fe25-4ffe-9450-ebb304b44fba, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, b8d656a3-d542-43f6-86e8-0b843648eb8d, 8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
window.name
The window.name API allows websites to store data that will persist after the user has navigated the tab to a different website. This mechanism could be partitioned so that data is not allowed to persist between websites. |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_97c426b7-b359-4b08-b700-c379123eadbd, name_d86dd658-0ff2-4870-ab05-f3bb419a9b69, name_a4208d20-99b0-4e14-8a6f-62eda848d435, name_0fc43b05-93de-4898-990f-5d0352927a8d, name_62edda60-1774-48e0-b6e1-52259766cca0 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_53f07b6a-da16-4de8-82b2-3bca13302161, name_cf5b2e6b-a78d-45cb-b7ea-433c997f365f, name_558012cd-bf8c-453c-b0fc-6ceaea887a41, name_dbc600f4-7b97-4314-a4c7-ce77a826aad5, name_3830852b-eaf9-49ee-9612-368175afa763 result, different first party: name_53f07b6a-da16-4de8-82b2-3bca13302161, name_cf5b2e6b-a78d-45cb-b7ea-433c997f365f, name_558012cd-bf8c-453c-b0fc-6ceaea887a41, name_dbc600f4-7b97-4314-a4c7-ce77a826aad5, name_3830852b-eaf9-49ee-9612-368175afa763 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_bda42e9e-2ddc-4bfe-8436-749862b310a9, name_a82d652a-6589-458f-9d2e-3f853727d44e, name_7583f0bf-a71e-4c3d-b33e-576800b48639, name_049569cf-35a2-40d3-b505-48ba427a935c, name_2953b826-4eff-4890-99c8-bc5fa7037c23 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_3e380705-3e60-4543-80d4-6abfc3aa00f3, name_e2dad053-92dc-4c83-9e12-04c860fec5de, name_61430277-80cf-48b3-80d9-237145c0d8e7, name_a7a04a2f-1201-457e-95aa-b3e5d802c26e, name_2babac8c-264d-48db-9b44-49b8dd8b969a result, different first party: name_3e380705-3e60-4543-80d4-6abfc3aa00f3, name_e2dad053-92dc-4c83-9e12-04c860fec5de, name_61430277-80cf-48b3-80d9-237145c0d8e7, name_a7a04a2f-1201-457e-95aa-b3e5d802c26e, name_2babac8c-264d-48db-9b44-49b8dd8b969a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_a39c5346-059d-4510-82d8-8bfea461cc17, name_b842620f-65bb-4ec2-b89b-888354862fbc, name_36351bfd-bc1c-4c77-8d91-d8174c0158fc, name_5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc, name_860e45d2-381a-47a9-b5cd-0e37c0d03f02 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_8c504876-2866-4a4b-8536-4585bf85bf64 result, different first party: unsupported: false passed: true test failed: false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_fdfdb499-12ca-4871-a79c-78f8a3299a78, name_0eae6060-999a-4f32-97b0-7df902d381d5, name_198c8c95-9749-4613-a374-435273ec30c0, name_33dacbd4-fa10-4551-a9ab-fffcb0fb66ab, name_7659c04b-f0f0-47cc-98a4-b9efc7731164 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_ae90fe05-7add-4506-b4a6-05b0ff09727b, name_d8ac5859-fdee-4da8-acc0-87a464f5b23d, name_4b92c79e-6cdd-4ff2-af83-d23ad10deadf, name_19b61752-c8c9-426e-8bc1-e57591cb6549, name_3d284730-6018-4426-9233-ba55b5edacf4 result, different first party: name_ae90fe05-7add-4506-b4a6-05b0ff09727b, name_d8ac5859-fdee-4da8-acc0-87a464f5b23d, name_4b92c79e-6cdd-4ff2-af83-d23ad10deadf, name_19b61752-c8c9-426e-8bc1-e57591cb6549, name_3d284730-6018-4426-9233-ba55b5edacf4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_e9ea0ac4-a45d-421f-961c-6e9e14000a44, name_67391a77-7359-4b4a-a575-5d0865e50d35, name_088c23ed-84e6-4f82-b80d-551047c771c6, name_9ea653f5-2526-438c-9505-018f36179296, name_ae4a2f97-fe22-43c5-8804-f82922e7afec result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_879bc8c2-d90f-4352-8c40-3e021923c276, name_01f09b3d-7797-47d8-ac45-3f209e6b2ba3 result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_97ead046-45c5-401d-b63c-5ccc239dd543, name_59aa2d42-8262-4767-99e3-384619556b91, name_484acdad-25bb-4433-94b1-6c16d4fd390e, name_bfc3994e-661e-4006-b356-b10ee5d44de5, name_50851283-1da0-4339-927f-2aa4fdc2fc6e result, different first party: name_97ead046-45c5-401d-b63c-5ccc239dd543, name_59aa2d42-8262-4767-99e3-384619556b91, name_484acdad-25bb-4433-94b1-6c16d4fd390e, name_bfc3994e-661e-4006-b356-b10ee5d44de5, name_50851283-1da0-4339-927f-2aa4fdc2fc6e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_204fbf6e-3b84-4138-b1da-b71b5d502669, name_affb069f-fe25-4ffe-9450-ebb304b44fba, name_8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, name_b8d656a3-d542-43f6-86e8-0b843648eb8d, name_8b37f004-4d17-4386-a388-9cfc59051659 result, different first party: name_204fbf6e-3b84-4138-b1da-b71b5d502669, name_affb069f-fe25-4ffe-9450-ebb304b44fba, name_8de0c3d7-f222-460e-ab1b-5ba012cbd6a3, name_b8d656a3-d542-43f6-86e8-0b843648eb8d, name_8b37f004-4d17-4386-a388-9cfc59051659 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
HTTPS testsWhich browsers prevent unencrypted network connections?
HTTPS is the protocol that web browsers use to connect securely to websites. When HTTPS is being used, the connection is encrypted so that third parties on the network cannot read content being sent between the server and your browser. In the past, insecure connections were the default and websites would need to actively request that a browser use HTTPS. Now the status quo is shifting, and browser makers are moving toward a world where HTTPS is the default protocol.` |
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Insecure website warning
Checks to see if the browser stops loading an insecure website and warns the user before giving them the option to continue. Known as HTTPS-Only Mode in some browsers. |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: true result: Insecure website never loaded |
passed: true, true, true, true, true result: Insecure website never loaded, Insecure website never loaded, Insecure website never loaded, Insecure website never loaded, Insecure website never loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: true, true result: Insecure website never loaded, Insecure website never loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
Upgradable address
Checks to see if an insecure address entered into the browser's address bar is upgraded to HTTPS whenever possible. |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true passed: true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true, true passed: true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
Upgradable hyperlink
Checks to see if the user has clicked on a hyperlink to an insecure address, if the browser upgrades that address to HTTPS whenever possible. |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true passed: true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true, true passed: true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
Upgradable image
Checks to see if the browser attempts to upgrade an insecure address for an image to HTTPS whenever possible. |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true result: upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true result: upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
Upgradable script
Checks to see if the browser attempts to upgrade an insecure address for an script to HTTPS whenever possible. |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true result: upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true result: upgraded, upgraded |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
Misc testsWhich browsers provide additional assorted privacy protections?
This category includes tests for the presence of miscellaneous privacy features |
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ECH enabled
Encrypted Client Hello (ECH) is a new protocol that hides the website you are visiting from third-party network eavesdroppers. |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: plaintext passed: false, false, false, false, false |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: plaintext passed: false, false, false, false, true |
SNI_status: plaintext passed: false |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: encrypted passed: true, true, false, true, true |
SNI_status: plaintext passed: false, false, false, false, false |
SNI_status: plaintext passed: false, false |
SNI_status: plaintext passed: false, true, true, true, false |
SNI_status: encrypted passed: true, true, true, true, true |
GPC enabled first-party
The Global Privacy Control is an HTTP header that can be sent by a browser to instruct a website not to sell the user's personal data to third parties. This test checks to see if the GPC header is sent by default to the top-level website. |
header value: 1 passed: true, true, true, true, true |
header value: undefined passed: false, false, false, false, false |
header value: undefined passed: false, false, false, false, false |
header value: undefined passed: false, false, false, false, false |
header value: undefined passed: false, false, false, false, false |
header value: 1 passed: true |
header value: 1 passed: true, true, true, true, true |
header value: undefined passed: false, false, false, false, false |
header value: undefined passed: false, false, false, false, false |
header value: 1 passed: true, true |
header value: undefined passed: false, false, false, false, false |
header value: undefined passed: false, false, false, false, false |
GPC enabled third-party
The Global Privacy Control is an HTTP header that can be sent by a browser to instruct a visited website not to sell the user's personal data to other parties. This test checks to see if the GPC header is sent to third-party elements on the web page. |
sec-gpc: 1 passed: true, true, true, true, true |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
sec-gpc: 1 passed: true |
sec-gpc: 1 passed: true, true, true, true, true |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
sec-gpc: 1 passed: true, true |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
IP address leak
IP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address. |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: true, true |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
Stream isolation
Browsers that use Tor can use a different Tor circuit per top-level website. |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true readSameFirstParty: Error: Unsupported readDifferentFirstParty: Error: Unsupported testFailed: false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: false, false readSameFirstParty: 2a02:418:6017::148, 2a0b:f4c2:3::81 readDifferentFirstParty: 2a03:4000:15:928:dead:beef:ca1f:1337, 2001:67c:89c:702:1ce:1ce:babe:3 passed: true, true testFailed: false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true, true, true, true, true readSameFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported readDifferentFirstParty: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported testFailed: false, false, false, false, false |
Tor enabled
The Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default. |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false passed: false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: true, true passed: true, true |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
Fingerprinting resistance testsWhich browsers hide what's unique about your device?
Fingerprinting is a technique trackers use to uniquely identify you as you browse the web. A fingerprinting script will measure several characteristics of your browser and, combining this data, will build a fingerprint that may uniquely identify you among web users. Browsers can introduce countermeasures, such as minimizing the distinguishing information disclosed by certain web APIs so your browser is harder to pick out from the crowd (so-called 'fingerprinting resistance').`, |
||||||||||||
Media query screen height
Height of the user's screen in pixels. |
expression: undefined desired expression: undefined actual value: 1294,1296,1297,1292,1293 desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 900 desired value: undefined passed: true |
expression: undefined desired expression: undefined actual value: 900,900,900,900,900 desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 900,900 desired value: undefined passed: true,true |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
Media query screen width
Width of the user's screen in pixels. |
expression: undefined desired expression: undefined actual value: 1206,1202,1204,1205,1202 desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 1600 desired value: undefined passed: true |
expression: undefined desired expression: undefined actual value: 1400,1400,1400,1400,1400 desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 1400,1400 desired value: undefined passed: true,true |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
outerHeight
Height of the browser window in pixels, including browser chrome. |
expression: outerHeight desired expression: undefined actual value: 1294,1296,1297,1292,1293 desired value: undefined passed: true,true,true,true,true |
expression: outerHeight desired expression: undefined actual value: 1371,1371,1371,1371,1371 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 1131,1131,1131,1131,1131 desired value: undefined passed: true,true,true,true,true |
expression: outerHeight desired expression: undefined actual value: 1371,1371,1371,1371,1371 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 1040,1040,1040,1040,1040 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 900 desired value: undefined passed: true |
expression: outerHeight desired expression: undefined actual value: 900,900,900,900,900 desired value: undefined passed: true,true,true,true,true |
expression: outerHeight desired expression: undefined actual value: 1061,1061,1061,1061,1061 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 886,886,886,886,886 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 900,900 desired value: undefined passed: true,true |
expression: outerHeight desired expression: undefined actual value: 1371,1371,1371,1371,1371 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 1371,1371,1371,1371,1371 desired value: undefined passed: false,false,false,false,false |
screen.height
Height of the user's screen, in pixels. |
expression: screen.height desired expression: undefined actual value: 1294,1296,1297,1292,1293 desired value: undefined passed: true,true,true,true,true |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 900 desired value: undefined passed: true |
expression: screen.height desired expression: undefined actual value: 900,900,900,900,900 desired value: undefined passed: true,true,true,true,true |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 900,900 desired value: undefined passed: true,true |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
screen.width
Width of the user's screen, in pixels. |
expression: screen.width desired expression: undefined actual value: 1206,1202,1204,1205,1202 desired value: undefined passed: true,true,true,true,true |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 1600 desired value: undefined passed: true |
expression: screen.width desired expression: undefined actual value: 1400,1400,1400,1400,1400 desired value: undefined passed: true,true,true,true,true |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 1400,1400 desired value: undefined passed: true,true |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560,2560 desired value: undefined passed: false,false,false,false,false |
screenX
Position, in pixels, of the left edge of the browser window on screen. |
expression: screenX desired expression: undefined actual value: 6,7,1,2,3 desired value: undefined passed: true,true,true,true,true |
expression: screenX desired expression: undefined actual value: 22,22,22,22,22 desired value: undefined passed: false,false,false,false,false |
expression: screenX desired expression: undefined actual value: 0,0,0,0,0 desired value: undefined passed: true,true,true,true,true |
expression: screenX desired expression: undefined actual value: 22,22,22,22,22 desired value: undefined passed: false,false,false,false,false |
expression: screenX desired expression: undefined actual value: 4,4,4,4,4 desired value: undefined passed: true,true,true,true,true |
expression: screenX desired expression: undefined actual value: 0 desired value: undefined passed: true |
expression: screenX desired expression: undefined actual value: 0,0,0,0,0 desired value: undefined passed: true,true,true,true,true |
expression: screenX desired expression: undefined actual value: 320,320,320,320,320 desired value: undefined passed: false,false,false,false,false |
expression: screenX desired expression: undefined actual value: 527,527,527,527,527 desired value: undefined passed: false,false,false,false,false |
expression: screenX desired expression: undefined actual value: 0,0 desired value: undefined passed: true,true |
expression: screenX desired expression: undefined actual value: 22,22,22,22,22 desired value: undefined passed: false,false,false,false,false |
expression: screenX desired expression: undefined actual value: 22,22,22,22,22 desired value: undefined passed: false,false,false,false,false |
screenY
Position, in pixels, of the top edge of the browser window on screen. |
expression: screenY desired expression: undefined actual value: 8,0,2,8,8 desired value: undefined passed: true,true,true,true,true |
expression: screenY desired expression: undefined actual value: 47,47,47,47,47 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 1440,1440,1440,1440,1440 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 47,47,47,47,47 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 25,25,25,25,25 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 0 desired value: undefined passed: true |
expression: screenY desired expression: undefined actual value: 0,0,0,0,0 desired value: undefined passed: true,true,true,true,true |
expression: screenY desired expression: undefined actual value: 202,202,202,202,202 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 163,163,163,163,163 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 0,0 desired value: undefined passed: true,true |
expression: screenY desired expression: undefined actual value: 47,47,47,47,47 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 47,47,47,47,47 desired value: undefined passed: false,false,false,false,false |
System font detection
Web pages can detect the presence of a font installed on the user's system. The presence or absence of various fonts is commonly used to fingerprint users. |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
Tracking query parameter testsWhich browsers remove URL parameters that can track you?
When you browse from one web page to another, tracking companies will frequently attach a 'tracking query parameter' to the address of the second web page. That query parameter may contain a unique identifier that tracks you individually as you browse the web. And these query parameters are frequently synchronized with cookies, making them a powerful tracking vector. Web browsers can protect you from known tracking query parameters by stripping them from web addresses before your browser sends them. (The set of tracking query parameters tested here was largely borrowed from Brave.)` |
||||||||||||
__hsfp
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
__hssc
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
__hstc
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
__s
Drip.com email address tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
_hsenc
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
_openstat
Yandex tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
dclid
DoubleClick Click ID (Google) |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
fbclid
Facebook Click Identifier |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
gclid
Google Click Identifier |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
hsCtaTracking
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
mc_eid
Mailchimp Email ID (email recipient's address) |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
mkt_tok
Adobe Marketo tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
ml_subscriber
MailerLite email tracking |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
ml_subscriber_hash
MailerLite email tracking |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
msclkid
Microsoft Click ID |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
oly_anon_id
Omeda marketing 'anonymous' customer id |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
oly_enc_id
Omeda marketing 'known' customer id |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
rb_clickid
Unknown high-entropy tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
s_cid
Adobe Site Catalyst tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
vero_conv
Vero tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
vero_id
Vero tracking parameter |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
wickedid
Wicked Reports e-commerce tracking |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
yclid
Yandex Click ID |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true |
passed: true, true, true, true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
passed: true, true |
value: 6398485611208986 passed: false, false, false, false, false |
value: 6398485611208986 passed: false, false, false, false, false |
Tracker content blocking testsWhich browsers block important known tracking scripts and pixels?
When you visit a web page, it frequently has third-party embedded tracking content, such as scripts and tracking pixels. These embedded components spy on you. Some browsers and browser extensions maintain list of tracking companies and block their content from being loaded. This section checks to see if a browser blocks 20 of the largest trackers listed by https://whotracks.me.` |
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Adobe
Tests whether the browser blocks the page from loading the tracker at https://munchkin.marketo.net/munchkin.js |
url: https://munchkin.marketo.net/munchkin.js passed: true, true, true, true, true |
url: https://munchkin.marketo.net/munchkin.js passed: false, false, false, false, false |
url: https://munchkin.marketo.net/munchkin.js passed: true, true, true, true, true |
url: https://munchkin.marketo.net/munchkin.js passed: false, false, false, false, false |
url: https://munchkin.marketo.net/munchkin.js passed: false, false, false, false, false |
url: https://munchkin.marketo.net/munchkin.js passed: true |
url: https://munchkin.marketo.net/munchkin.js passed: true, true, true, true, true |
url: https://munchkin.marketo.net/munchkin.js passed: false, false, false, false, false |
url: https://munchkin.marketo.net/munchkin.js passed: false, false, false, false, false |
url: https://munchkin.marketo.net/munchkin.js passed: false, false |
url: https://munchkin.marketo.net/munchkin.js passed: false, false, false, false, false |
url: https://munchkin.marketo.net/munchkin.js passed: false, false, false, false, false |
Adobe Audience Manager
Tests whether the browser blocks the page from loading the tracker at https://dpm.demdex.net/ibs |
url: https://dpm.demdex.net/ibs passed: true, true, true, true, true |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
url: https://dpm.demdex.net/ibs passed: true, true, true, true, true |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
url: https://dpm.demdex.net/ibs passed: true |
url: https://dpm.demdex.net/ibs passed: true, true, true, true, true |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
url: https://dpm.demdex.net/ibs passed: false, false |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
Amazon adsystem
Tests whether the browser blocks the page from loading the tracker at https://s.amazon-adsystem.com/dcm |
url: https://s.amazon-adsystem.com/dcm passed: true, true, true, true, true |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: true, true, true, true, true |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: true |
url: https://s.amazon-adsystem.com/dcm passed: true, true, true, true, true |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: false, false |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false, false |
AppNexus
Tests whether the browser blocks the page from loading the tracker at https://ib.adnxs.com/px?id=178248&t=1 |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true, true, true, true, true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true, true, true, true, true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true, true, true, true, true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
Bing Ads
Tests whether the browser blocks the page from loading the tracker at https://bat.bing.com/bat.js |
url: https://bat.bing.com/bat.js passed: true, true, true, true, true |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
url: https://bat.bing.com/bat.js passed: true, true, true, true, true |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
url: https://bat.bing.com/bat.js passed: true |
url: https://bat.bing.com/bat.js passed: true, true, true, true, true |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
url: https://bat.bing.com/bat.js passed: false, false |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
Chartbeat
Tests whether the browser blocks the page from loading the tracker at https://static.chartbeat.com/js/chartbeat.js |
url: https://static.chartbeat.com/js/chartbeat.js passed: true, true, true, true, true |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: true, true, true, true, true |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: true |
url: https://static.chartbeat.com/js/chartbeat.js passed: true, true, true, true, true |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
Criteo
Tests whether the browser blocks the page from loading the tracker at https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true, true, true, true, true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true, true, true, true, true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true, true, true, true, true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
DoubleClick (Google)
Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false, false, false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false, false, false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false, false, false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false, false, false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false, false, false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false, false, false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false, false, false, false |
Facebook tracking
Tests whether the browser blocks the page from loading the tracker at https://connect.facebook.net/en_US/fbevents.js |
url: https://connect.facebook.net/en_US/fbevents.js passed: true, true, true, true, true |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: true, true, true, true, true |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: true |
url: https://connect.facebook.net/en_US/fbevents.js passed: true, true, true, true, true |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
Google (third-party ad pixel)
Tests whether the browser blocks the page from loading the tracker at https://www.google.com/pagead/1p-user-list/ |
url: https://www.google.com/pagead/1p-user-list/ passed: true, true, true, true, true |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: true, true, true, true, true |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: true |
url: https://www.google.com/pagead/1p-user-list/ passed: true, true, true, true, true |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false, false |
Google Analytics
Tests whether the browser blocks the page from loading the tracker at https://google-analytics.com/urchin.js |
url: https://google-analytics.com/urchin.js passed: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
url: https://google-analytics.com/urchin.js passed: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
url: https://google-analytics.com/urchin.js passed: true |
url: https://google-analytics.com/urchin.js passed: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
url: https://google-analytics.com/urchin.js passed: false, false |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
Google Tag Manager
Tests whether the browser blocks the page from loading the tracker at https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true, true, true, true, true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true, true, true, true, true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true, true, true, true, true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false, false |
Index Exchange
Tests whether the browser blocks the page from loading the tracker at https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true, true, true, true, true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true, true, true, true, true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true, true, true, true, true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false, false |
New Relic
Tests whether the browser blocks the page from loading the tracker at https://js-agent.newrelic.com/nr-1212.min.js |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true, true, true, true, true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true, true, true, true, true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true, true, true, true, true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
Quantcast
Tests whether the browser blocks the page from loading the tracker at https://pixel.quantserve.com/pixel |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: true |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: false, false |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
Scorecard Research Beacon
Tests whether the browser blocks the page from loading the tracker at https://sb.scorecardresearch.com/internal-c2/default/cs.js |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true, true, true, true, true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false, false, false, false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true, true, true, true, true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false, false, false, false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false, false, false, false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true, true, true, true, true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false, false, false, false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false, false, false, false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false, false, false, false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false, false, false, false, false |
Taboola
Tests whether the browser blocks the page from loading the tracker at https://trc.taboola.com/futureplc-tomsguide/trc/3/json |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true, true, true, true, true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true, true, true, true, true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true, true, true, true, true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
Twitter pixel
Tests whether the browser blocks the page from loading the tracker at https://t.co/i/adsct |
url: https://t.co/i/adsct passed: true, true, true, true, true |
url: https://t.co/i/adsct passed: false, false, false, false, false |
url: https://t.co/i/adsct passed: true, true, true, true, true |
url: https://t.co/i/adsct passed: false, false, false, false, false |
url: https://t.co/i/adsct passed: false, false, false, false, false |
url: https://t.co/i/adsct passed: true |
url: https://t.co/i/adsct passed: true, true, true, true, true |
url: https://t.co/i/adsct passed: false, false, false, false, false |
url: https://t.co/i/adsct passed: false, false, false, false, false |
url: https://t.co/i/adsct passed: false, false |
url: https://t.co/i/adsct passed: false, false, false, false, false |
url: https://t.co/i/adsct passed: false, false, false, false, false |
Yandex Ads
Tests whether the browser blocks the page from loading the tracker at https://yandex.ru/ads/system/header-bidding.js |
url: https://yandex.ru/ads/system/header-bidding.js passed: true, true, true, true, true |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: true, true, true, true, true |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: true |
url: https://yandex.ru/ads/system/header-bidding.js passed: true, true, true, true, true |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
Tracking cookie protection testsWhich browsers block important known tracking cookies?
A large fraction of web pages on the web have hidden third-party trackers that read and write cookies in your browser. These cookies can be used to track your browsing across websites. This section checks to see if a browser stops cross-site tracking by cookies from 20 of the largest trackers listed by https://whotracks.me.`, |
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Adobe
Tests whether the browser stops cookies from munchkin.marketo.net from tracking users across websites. |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://munchkin.marketo.net/munchkin.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true url: https://munchkin.marketo.net/munchkin.js cookieFound: false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://munchkin.marketo.net/munchkin.js cookieFound: true, true, false, true, false |
Adobe Audience Manager
Tests whether the browser stops cookies from dpm.demdex.net from tracking users across websites. |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://dpm.demdex.net/ibs cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true url: https://dpm.demdex.net/ibs cookieFound: false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, true url: https://dpm.demdex.net/ibs cookieFound: false, false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://dpm.demdex.net/ibs cookieFound: true, true, false, true, false |
Amazon adsystem
Tests whether the browser stops cookies from s.amazon-adsystem.com from tracking users across websites. |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://s.amazon-adsystem.com/dcm cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true url: https://s.amazon-adsystem.com/dcm cookieFound: false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://s.amazon-adsystem.com/dcm cookieFound: true, true, false, true, false |
AppNexus
Tests whether the browser stops cookies from ib.adnxs.com from tracking users across websites. |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true, true, false, true, false |
Bing Ads
Tests whether the browser stops cookies from bat.bing.com from tracking users across websites. |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://bat.bing.com/bat.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://bat.bing.com/bat.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: true url: https://bat.bing.com/bat.js cookieFound: false |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: true, true url: https://bat.bing.com/bat.js cookieFound: false, false |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://bat.bing.com/bat.js cookieFound: true, true, false, true, false |
Chartbeat
Tests whether the browser stops cookies from static.chartbeat.com from tracking users across websites. |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://static.chartbeat.com/js/chartbeat.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://static.chartbeat.com/js/chartbeat.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: true, true, false, true, false |
Criteo
Tests whether the browser stops cookies from dis.criteo.com from tracking users across websites. |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: true, true, false, true, false |
DoubleClick (Google)
Tests whether the browser stops cookies from securepubads.g.doubleclick.net from tracking users across websites. |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, false url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: true, true, false, true, true |
Facebook tracking
Tests whether the browser stops cookies from connect.facebook.net from tracking users across websites. |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://connect.facebook.net/en_US/fbevents.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, false url: https://connect.facebook.net/en_US/fbevents.js cookieFound: true, true, false, true, true |
Google (third-party ad pixel)
Tests whether the browser stops cookies from www.google.com from tracking users across websites. |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://www.google.com/pagead/1p-user-list/ cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: true, true, false, true, false |
Google Analytics
Tests whether the browser stops cookies from google-analytics.com from tracking users across websites. |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://google-analytics.com/urchin.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://google-analytics.com/urchin.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true url: https://google-analytics.com/urchin.js cookieFound: false |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true, true url: https://google-analytics.com/urchin.js cookieFound: false, false |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, false url: https://google-analytics.com/urchin.js cookieFound: true, true, false, true, true |
Google Tag Manager
Tests whether the browser stops cookies from www.googletagmanager.com from tracking users across websites. |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: false, false, true, false, false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true, true, false, true, true |
Index Exchange
Tests whether the browser stops cookies from dsum-sec.casalemedia.com from tracking users across websites. |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: true, true, false, true, false |
New Relic
Tests whether the browser stops cookies from js-agent.newrelic.com from tracking users across websites. |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true, true, false, true, false |
Quantcast
Tests whether the browser stops cookies from pixel.quantserve.com from tracking users across websites. |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://pixel.quantserve.com/pixel cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true url: https://pixel.quantserve.com/pixel cookieFound: false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://pixel.quantserve.com/pixel cookieFound: true, true, false, true, false |
Scorecard Research Beacon
Tests whether the browser stops cookies from sb.scorecardresearch.com from tracking users across websites. |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true, true, false, true, false |
Taboola
Tests whether the browser stops cookies from trc.taboola.com from tracking users across websites. |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: false, true, true, false, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: true, false, false, true, false |
Twitter pixel
Tests whether the browser stops cookies from t.co from tracking users across websites. |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://t.co/i/adsct cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://t.co/i/adsct cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: true url: https://t.co/i/adsct cookieFound: false |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: true, true url: https://t.co/i/adsct cookieFound: false, false |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: false, false, true, false, true url: https://t.co/i/adsct cookieFound: true, true, false, true, false |
Yandex Ads
Tests whether the browser stops cookies from yandex.ru from tracking users across websites. |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://yandex.ru/ads/system/header-bidding.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, true, false, false, false |
Cross-session first-party tracking testsWhich browsers prevent websites from tracking you across browser sessions?
A common vulnerability of web browsers is that they allow websites ("first parties") to 'tag' your browser with some tracking data. This tag can be used to re-identify you when you return to a website you visited before. This category of leaks can be prevented by browser if they clean or isolate data between browser sessions. (In cases where a user has logged into a website or entered detailed information, it may be justifiable for a browser to retain information across sessions. These tests check when no such justification exists: when you have entered no significant information into a website, will the browser still retain data that allows you to be tracked across sessions?) |
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Alt-Svc
Alt-Svc allows the server to indicate to the web browser that a resource should be loaded on a different server. Because this is a persistent setting, it could be used to track users across websites if it is not correctly partitioned. |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h3, h2, h3, h2 result, different session: h3, h2, h3, h2, h3 unsupported: true, false, true, false, true passed: , true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3 result, different session: h3 unsupported: false passed: false test failed: false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h2, h2, h2, h2 result, different session: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h2 result, different session: h2, h2 unsupported: true, true passed: undefined test failed: false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CacheStorage
The Cache API is a content storage mechanism originally introduced to support ServiceWorkers. If the same Cache object is accessible to multiple websites, it can be abused to track users. |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: bda42e9e-2ddc-4bfe-8436-749862b310a9_1p, a82d652a-6589-458f-9d2e-3f853727d44e_1p, 7583f0bf-a71e-4c3d-b33e-576800b48639_1p, 049569cf-35a2-40d3-b505-48ba427a935c_1p, 2953b826-4eff-4890-99c8-bc5fa7037c23_1p result, different session: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_1p, b842620f-65bb-4ec2-b89b-888354862fbc_1p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_1p, b842620f-65bb-4ec2-b89b-888354862fbc_1p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_1p result, different session: Error: cacheKeys[0] is undefined unsupported: false passed: true test failed: false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: fdfdb499-12ca-4871-a79c-78f8a3299a78_1p, 0eae6060-999a-4f32-97b0-7df902d381d5_1p, 198c8c95-9749-4613-a374-435273ec30c0_1p, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab_1p, 7659c04b-f0f0-47cc-98a4-b9efc7731164_1p result, different session: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p result, different session: 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 879bc8c2-d90f-4352-8c40-3e021923c276_1p, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3_1p result, different session: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_1p_http, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p_http, a4208d20-99b0-4e14-8a6f-62eda848d435_1p_http, 0fc43b05-93de-4898-990f-5d0352927a8d_1p_http, 62edda60-1774-48e0-b6e1-52259766cca0_1p_http result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_1p_http, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p_http, a4208d20-99b0-4e14-8a6f-62eda848d435_1p_http, 0fc43b05-93de-4898-990f-5d0352927a8d_1p_http, 62edda60-1774-48e0-b6e1-52259766cca0_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p_http, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p_http, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p_http, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p_http, 3830852b-eaf9-49ee-9612-368175afa763_1p_http result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p_http, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p_http, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p_http, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p_http, 3830852b-eaf9-49ee-9612-368175afa763_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: bda42e9e-2ddc-4bfe-8436-749862b310a9_1p_http, a82d652a-6589-458f-9d2e-3f853727d44e_1p_http, 7583f0bf-a71e-4c3d-b33e-576800b48639_1p_http, 049569cf-35a2-40d3-b505-48ba427a935c_1p_http, 2953b826-4eff-4890-99c8-bc5fa7037c23_1p_http result, different session: bda42e9e-2ddc-4bfe-8436-749862b310a9_1p_http, a82d652a-6589-458f-9d2e-3f853727d44e_1p_http, 7583f0bf-a71e-4c3d-b33e-576800b48639_1p_http, 049569cf-35a2-40d3-b505-48ba427a935c_1p_http, 2953b826-4eff-4890-99c8-bc5fa7037c23_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p_http, e2dad053-92dc-4c83-9e12-04c860fec5de_1p_http, 61430277-80cf-48b3-80d9-237145c0d8e7_1p_http, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p_http, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p_http result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p_http, e2dad053-92dc-4c83-9e12-04c860fec5de_1p_http, 61430277-80cf-48b3-80d9-237145c0d8e7_1p_http, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p_http, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_1p_http, b842620f-65bb-4ec2-b89b-888354862fbc_1p_http, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p_http, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p_http, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p_http result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_1p_http, b842620f-65bb-4ec2-b89b-888354862fbc_1p_http, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p_http, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p_http, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_1p_http result, different session: null unsupported: false passed: true test failed: false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: fdfdb499-12ca-4871-a79c-78f8a3299a78_1p_http, 0eae6060-999a-4f32-97b0-7df902d381d5_1p_http, 198c8c95-9749-4613-a374-435273ec30c0_1p_http, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab_1p_http, 7659c04b-f0f0-47cc-98a4-b9efc7731164_1p_http result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p_http, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p_http, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p_http, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p_http, 3d284730-6018-4426-9233-ba55b5edacf4_1p_http result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p_http, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p_http, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p_http, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p_http, 3d284730-6018-4426-9233-ba55b5edacf4_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p_http, 67391a77-7359-4b4a-a575-5d0865e50d35_1p_http, 088c23ed-84e6-4f82-b80d-551047c771c6_1p_http, 9ea653f5-2526-438c-9505-018f36179296_1p_http, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p_http result, different session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p_http, 67391a77-7359-4b4a-a575-5d0865e50d35_1p_http, 088c23ed-84e6-4f82-b80d-551047c771c6_1p_http, 9ea653f5-2526-438c-9505-018f36179296_1p_http, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 879bc8c2-d90f-4352-8c40-3e021923c276_1p_http, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3_1p_http result, different session: , unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p_http, 59aa2d42-8262-4767-99e3-384619556b91_1p_http, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p_http, bfc3994e-661e-4006-b356-b10ee5d44de5_1p_http, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p_http result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p_http, 59aa2d42-8262-4767-99e3-384619556b91_1p_http, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p_http, bfc3994e-661e-4006-b356-b10ee5d44de5_1p_http, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p_http, affb069f-fe25-4ffe-9450-ebb304b44fba_1p_http, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p_http, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p_http, 8b37f004-4d17-4386-a388-9cfc59051659_1p_http result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p_http, affb069f-fe25-4ffe-9450-ebb304b44fba_1p_http, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p_http, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p_http, 8b37f004-4d17-4386-a388-9cfc59051659_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_1p_js, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p_js, a4208d20-99b0-4e14-8a6f-62eda848d435_1p_js, 0fc43b05-93de-4898-990f-5d0352927a8d_1p_js, 62edda60-1774-48e0-b6e1-52259766cca0_1p_js result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_1p_js, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p_js, a4208d20-99b0-4e14-8a6f-62eda848d435_1p_js, 0fc43b05-93de-4898-990f-5d0352927a8d_1p_js, 62edda60-1774-48e0-b6e1-52259766cca0_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p_js, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p_js, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p_js, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p_js, 3830852b-eaf9-49ee-9612-368175afa763_1p_js result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p_js, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p_js, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p_js, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p_js, 3830852b-eaf9-49ee-9612-368175afa763_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: bda42e9e-2ddc-4bfe-8436-749862b310a9_1p_js, a82d652a-6589-458f-9d2e-3f853727d44e_1p_js, 7583f0bf-a71e-4c3d-b33e-576800b48639_1p_js, 049569cf-35a2-40d3-b505-48ba427a935c_1p_js, 2953b826-4eff-4890-99c8-bc5fa7037c23_1p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p_js, e2dad053-92dc-4c83-9e12-04c860fec5de_1p_js, 61430277-80cf-48b3-80d9-237145c0d8e7_1p_js, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p_js, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p_js result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p_js, e2dad053-92dc-4c83-9e12-04c860fec5de_1p_js, 61430277-80cf-48b3-80d9-237145c0d8e7_1p_js, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p_js, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_1p_js, b842620f-65bb-4ec2-b89b-888354862fbc_1p_js, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p_js, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p_js, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p_js result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_1p_js, b842620f-65bb-4ec2-b89b-888354862fbc_1p_js, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p_js, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p_js, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_1p_js result, different session: null unsupported: false passed: true test failed: false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: fdfdb499-12ca-4871-a79c-78f8a3299a78_1p_js, 0eae6060-999a-4f32-97b0-7df902d381d5_1p_js, 198c8c95-9749-4613-a374-435273ec30c0_1p_js, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab_1p_js, 7659c04b-f0f0-47cc-98a4-b9efc7731164_1p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p_js, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p_js, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p_js, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p_js, 3d284730-6018-4426-9233-ba55b5edacf4_1p_js result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p_js, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p_js, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p_js, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p_js, 3d284730-6018-4426-9233-ba55b5edacf4_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p_js, 67391a77-7359-4b4a-a575-5d0865e50d35_1p_js, 088c23ed-84e6-4f82-b80d-551047c771c6_1p_js, 9ea653f5-2526-438c-9505-018f36179296_1p_js, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p_js result, different session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p_js, 67391a77-7359-4b4a-a575-5d0865e50d35_1p_js, 088c23ed-84e6-4f82-b80d-551047c771c6_1p_js, 9ea653f5-2526-438c-9505-018f36179296_1p_js, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 879bc8c2-d90f-4352-8c40-3e021923c276_1p_js, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3_1p_js result, different session: , unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p_js, 59aa2d42-8262-4767-99e3-384619556b91_1p_js, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p_js, bfc3994e-661e-4006-b356-b10ee5d44de5_1p_js, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p_js result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p_js, 59aa2d42-8262-4767-99e3-384619556b91_1p_js, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p_js, bfc3994e-661e-4006-b356-b10ee5d44de5_1p_js, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p_js, affb069f-fe25-4ffe-9450-ebb304b44fba_1p_js, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p_js, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p_js, 8b37f004-4d17-4386-a388-9cfc59051659_1p_js result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p_js, affb069f-fe25-4ffe-9450-ebb304b44fba_1p_js, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p_js, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p_js, 8b37f004-4d17-4386-a388-9cfc59051659_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported result, different session: Error: Unsupported unsupported: true passed: undefined test failed: false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported unsupported: true, true passed: undefined test failed: false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_5333970310622878, fake_9367852972231181, fake_6929786532784159, fake_949512277320298, fake_20600447247349551 result, different session: fake_5333970310622878, fake_9367852972231181, fake_6929786532784159, fake_949512277320298, fake_20600447247349551 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_25035675128159207, fake_04335879092268957, fake_8759844428063286, fake_8954737528689729, fake_1959738068845509 result, different session: fake_25035675128159207, fake_04335879092268957, fake_8759844428063286, fake_8954737528689729, fake_1959738068845509 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_21414099946191678, fake_9201325686541824, fake_979913536809619, fake_2566645095978968, fake_576318884232615 result, different session: fake_21414099946191678, fake_9201325686541824, fake_979913536809619, fake_2566645095978968, fake_576318884232615 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_38696500759374675, fake_7506156413164926, fake_5048755202317381, fake_37183353222778304, fake_232725960157117 result, different session: fake_38696500759374675, fake_7506156413164926, fake_5048755202317381, fake_37183353222778304, fake_232725960157117 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_1364665829033389, fake_5817469365668393, fake_24310266074655296, fake_3055244474368304, fake_3429215544981652 result, different session: fake_1364665829033389, fake_5817469365668393, fake_24310266074655296, fake_3055244474368304, fake_3429215544981652 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_8350743394158924 result, different session: fake_19289346661179363 unsupported: false passed: true test failed: false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_6595690694233403, fake_07376456041312962, fake_6086754970895938, fake_8112035246729417, fake_7806243178200254 result, different session: fake_6377555401069386, fake_27958467200156245, fake_6236935298502313, fake_40165256167913155, fake_12889843023988767 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_6187948469889191, fake_27251898470202973, fake_9797693867566539, fake_8653662734063028, fake_468751030886841 result, different session: fake_6187948469889191, fake_27251898470202973, fake_9797693867566539, fake_8653662734063028, fake_468751030886841 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_5121103031492673, fake_8623214990239612, fake_055745565687727705, fake_22226301931403936, fake_9777508484362842 result, different session: fake_5121103031492673, fake_8623214990239612, fake_055745565687727705, fake_22226301931403936, fake_9777508484362842 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_9403469863123464, fake_03165206973597057 result, different session: fake_026779479363444603, fake_9032937411196602 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_747898479546824, fake_07149539181488818, fake_2973781739582604, fake_7136128811058093, fake_7288343127508534 result, different session: fake_747898479546824, fake_07149539181488818, fake_2973781739582604, fake_7136128811058093, fake_7288343127508534 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_4434438135992589, fake_6316049594923798, fake_4830821105551204, fake_22770608440894424, fake_7601723115399581 result, different session: fake_4434438135992589, fake_6316049594923798, fake_4830821105551204, fake_22770608440894424, fake_7601723115399581 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
favicon cache
A favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites. |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 2, 2, 2, 2, 2 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
fetch cache
When a resource is received via the Fetch API, it is frequently cached. That cache can potentially be abused for cross-site tracking. |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
iframe cache
An iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
image cache
Caching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
indexedDB
The IndexedDB API exposes a transactional database to web pages. That database can be used to track users across websites, unless it is partitioned. |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: bda42e9e-2ddc-4bfe-8436-749862b310a9_1p, a82d652a-6589-458f-9d2e-3f853727d44e_1p, 7583f0bf-a71e-4c3d-b33e-576800b48639_1p, 049569cf-35a2-40d3-b505-48ba427a935c_1p, 2953b826-4eff-4890-99c8-bc5fa7037c23_1p result, different session: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_1p, b842620f-65bb-4ec2-b89b-888354862fbc_1p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_1p, b842620f-65bb-4ec2-b89b-888354862fbc_1p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_1p result, different session: undefined unsupported: false passed: true test failed: false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: fdfdb499-12ca-4871-a79c-78f8a3299a78_1p, 0eae6060-999a-4f32-97b0-7df902d381d5_1p, 198c8c95-9749-4613-a374-435273ec30c0_1p, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab_1p, 7659c04b-f0f0-47cc-98a4-b9efc7731164_1p result, different session: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p, 67391a77-7359-4b4a-a575-5d0865e50d35_1p, 088c23ed-84e6-4f82-b80d-551047c771c6_1p, 9ea653f5-2526-438c-9505-018f36179296_1p, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p result, different session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p, 67391a77-7359-4b4a-a575-5d0865e50d35_1p, 088c23ed-84e6-4f82-b80d-551047c771c6_1p, 9ea653f5-2526-438c-9505-018f36179296_1p, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 879bc8c2-d90f-4352-8c40-3e021923c276_1p, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3_1p result, different session: undefined unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
localStorage
The localStorage API gives websites access to a key-value database that will remain available across visits. If the localStorage API is not partitioned or blocked, it can also be used to track users across websites. |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_1p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_1p, a4208d20-99b0-4e14-8a6f-62eda848d435_1p, 0fc43b05-93de-4898-990f-5d0352927a8d_1p, 62edda60-1774-48e0-b6e1-52259766cca0_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_1p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_1p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_1p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_1p, 3830852b-eaf9-49ee-9612-368175afa763_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: bda42e9e-2ddc-4bfe-8436-749862b310a9_1p, a82d652a-6589-458f-9d2e-3f853727d44e_1p, 7583f0bf-a71e-4c3d-b33e-576800b48639_1p, 049569cf-35a2-40d3-b505-48ba427a935c_1p, 2953b826-4eff-4890-99c8-bc5fa7037c23_1p result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_1p, e2dad053-92dc-4c83-9e12-04c860fec5de_1p, 61430277-80cf-48b3-80d9-237145c0d8e7_1p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_1p, 2babac8c-264d-48db-9b44-49b8dd8b969a_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_1p, b842620f-65bb-4ec2-b89b-888354862fbc_1p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_1p, b842620f-65bb-4ec2-b89b-888354862fbc_1p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_1p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_1p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_1p result, different session: null unsupported: false passed: true test failed: false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: fdfdb499-12ca-4871-a79c-78f8a3299a78_1p, 0eae6060-999a-4f32-97b0-7df902d381d5_1p, 198c8c95-9749-4613-a374-435273ec30c0_1p, 33dacbd4-fa10-4551-a9ab-fffcb0fb66ab_1p, 7659c04b-f0f0-47cc-98a4-b9efc7731164_1p result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_1p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_1p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_1p, 19b61752-c8c9-426e-8bc1-e57591cb6549_1p, 3d284730-6018-4426-9233-ba55b5edacf4_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p, 67391a77-7359-4b4a-a575-5d0865e50d35_1p, 088c23ed-84e6-4f82-b80d-551047c771c6_1p, 9ea653f5-2526-438c-9505-018f36179296_1p, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p result, different session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_1p, 67391a77-7359-4b4a-a575-5d0865e50d35_1p, 088c23ed-84e6-4f82-b80d-551047c771c6_1p, 9ea653f5-2526-438c-9505-018f36179296_1p, ae4a2f97-fe22-43c5-8804-f82922e7afec_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 879bc8c2-d90f-4352-8c40-3e021923c276_1p, 01f09b3d-7797-47d8-ac45-3f209e6b2ba3_1p result, different session: , unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_1p, 59aa2d42-8262-4767-99e3-384619556b91_1p, 484acdad-25bb-4433-94b1-6c16d4fd390e_1p, bfc3994e-661e-4006-b356-b10ee5d44de5_1p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_1p, affb069f-fe25-4ffe-9450-ebb304b44fba_1p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_1p, b8d656a3-d542-43f6-86e8-0b843648eb8d_1p, 8b37f004-4d17-4386-a388-9cfc59051659_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
prefetch cache
A <link rel='prefetch'...> suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites. |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received result, different session: Error: No requests received unsupported: true passed: undefined test failed: false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received unsupported: true, true passed: undefined test failed: false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
script cache
Caching of scripts in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
Cross-session third-party tracking testsWhich browsers prevent third-party trackers from tracking you across browser sessions?
A common vulnerability of web browsers is that they allow third-party trackers to 'tag' your browser with some tracking data. This tag can be used to re-identify you when you return to a website you visited before. This category of leaks can be prevented by browser if they clean or isolate data between browser sessions. (In cases where a user has logged into a website or entered detailed information, it may be justifiable for a browser to retain information across sessions. These tests check when no such justification exists: when you have entered no significant information into a website, will the browser still retain data that allows you to be tracked across sessions?) |
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Alt-Svc
Alt-Svc allows the server to indicate to the web browser that a resource should be loaded on a different server. Because this is a persistent setting, it could be used to track users across websites if it is not correctly partitioned. |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h2, h2, h2, h2 result, different session: h3, h3, h3, h3, h3 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3 result, different session: h3 unsupported: false passed: false test failed: false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h2, h2, h2, h2 result, different session: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h2 result, different session: h2, h2 unsupported: true, true passed: undefined test failed: false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CacheStorage
The Cache API is a content storage mechanism originally introduced to support ServiceWorkers. If the same Cache object is accessible to multiple websites, it can be abused to track users. |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_3p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p, a4208d20-99b0-4e14-8a6f-62eda848d435_3p, 0fc43b05-93de-4898-990f-5d0352927a8d_3p, 62edda60-1774-48e0-b6e1-52259766cca0_3p result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_3p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p, a4208d20-99b0-4e14-8a6f-62eda848d435_3p, 0fc43b05-93de-4898-990f-5d0352927a8d_3p, 62edda60-1774-48e0-b6e1-52259766cca0_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') result, different session: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_3p, b842620f-65bb-4ec2-b89b-888354862fbc_3p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_3p, b842620f-65bb-4ec2-b89b-888354862fbc_3p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_3p result, different session: Error: cacheKeys[0] is undefined unsupported: false passed: true test failed: false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p result, different session: 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p, 94cc93cc-dc90-4984-a54b-124aac75e1f6_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: Error: The operation is insecure., Error: The operation is insecure. result, different session: Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true passed: undefined test failed: false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_3p, 59aa2d42-8262-4767-99e3-384619556b91_3p, 484acdad-25bb-4433-94b1-6c16d4fd390e_3p, bfc3994e-661e-4006-b356-b10ee5d44de5_3p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_3p result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_3p, 59aa2d42-8262-4767-99e3-384619556b91_3p, 484acdad-25bb-4433-94b1-6c16d4fd390e_3p, bfc3994e-661e-4006-b356-b10ee5d44de5_3p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_3p_http, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p_http, a4208d20-99b0-4e14-8a6f-62eda848d435_3p_http, 0fc43b05-93de-4898-990f-5d0352927a8d_3p_http, 62edda60-1774-48e0-b6e1-52259766cca0_3p_http result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p_http, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p_http, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p_http, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p_http, 3830852b-eaf9-49ee-9612-368175afa763_3p_http result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p_http, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p_http, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p_http, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p_http, 3830852b-eaf9-49ee-9612-368175afa763_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p_http, e2dad053-92dc-4c83-9e12-04c860fec5de_3p_http, 61430277-80cf-48b3-80d9-237145c0d8e7_3p_http, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p_http, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p_http result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p_http, e2dad053-92dc-4c83-9e12-04c860fec5de_3p_http, 61430277-80cf-48b3-80d9-237145c0d8e7_3p_http, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p_http, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_3p_http, b842620f-65bb-4ec2-b89b-888354862fbc_3p_http, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p_http, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p_http, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p_http result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_3p_http, b842620f-65bb-4ec2-b89b-888354862fbc_3p_http, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p_http, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p_http, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: null result, different session: null unsupported: true passed: undefined test failed: false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p_http, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p_http, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p_http, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p_http, 3d284730-6018-4426-9233-ba55b5edacf4_3p_http result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p_http, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p_http, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p_http, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p_http, 3d284730-6018-4426-9233-ba55b5edacf4_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , result, different session: , unsupported: true, true passed: undefined test failed: false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p_http, affb069f-fe25-4ffe-9450-ebb304b44fba_3p_http, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p_http, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p_http, 8b37f004-4d17-4386-a388-9cfc59051659_3p_http result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p_http, affb069f-fe25-4ffe-9450-ebb304b44fba_3p_http, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p_http, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p_http, 8b37f004-4d17-4386-a388-9cfc59051659_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_3p_js, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p_js, a4208d20-99b0-4e14-8a6f-62eda848d435_3p_js, 0fc43b05-93de-4898-990f-5d0352927a8d_3p_js, 62edda60-1774-48e0-b6e1-52259766cca0_3p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p_js, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p_js, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p_js, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p_js, 3830852b-eaf9-49ee-9612-368175afa763_3p_js result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p_js, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p_js, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p_js, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p_js, 3830852b-eaf9-49ee-9612-368175afa763_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p_js, e2dad053-92dc-4c83-9e12-04c860fec5de_3p_js, 61430277-80cf-48b3-80d9-237145c0d8e7_3p_js, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p_js, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p_js result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p_js, e2dad053-92dc-4c83-9e12-04c860fec5de_3p_js, 61430277-80cf-48b3-80d9-237145c0d8e7_3p_js, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p_js, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_3p_js, b842620f-65bb-4ec2-b89b-888354862fbc_3p_js, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p_js, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p_js, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p_js result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_3p_js, b842620f-65bb-4ec2-b89b-888354862fbc_3p_js, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p_js, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p_js, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: null result, different session: null unsupported: true passed: undefined test failed: false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p_js, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p_js, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p_js, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p_js, 3d284730-6018-4426-9233-ba55b5edacf4_3p_js result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p_js, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p_js, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p_js, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p_js, 3d284730-6018-4426-9233-ba55b5edacf4_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , result, different session: , unsupported: true, true passed: undefined test failed: false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p_js, affb069f-fe25-4ffe-9450-ebb304b44fba_3p_js, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p_js, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p_js, 8b37f004-4d17-4386-a388-9cfc59051659_3p_js result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p_js, affb069f-fe25-4ffe-9450-ebb304b44fba_3p_js, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p_js, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p_js, 8b37f004-4d17-4386-a388-9cfc59051659_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_3p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p, a4208d20-99b0-4e14-8a6f-62eda848d435_3p, 0fc43b05-93de-4898-990f-5d0352927a8d_3p, 62edda60-1774-48e0-b6e1-52259766cca0_3p result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported result, different session: Error: Unsupported unsupported: true passed: undefined test failed: false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported unsupported: true, true passed: undefined test failed: false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_33469449848095434, fake_7953947360198648, fake_8646962790115433, fake_14813338889063155, fake_899469067388281 result, different session: fake_33469449848095434, fake_7953947360198648, fake_8646962790115433, fake_14813338889063155, fake_899469067388281 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_9205913173549163, fake_7484100910620868, fake_9957233172893352, fake_35020808048986174, fake_5329255847424259 result, different session: fake_9205913173549163, fake_7484100910620868, fake_9957233172893352, fake_35020808048986174, fake_5329255847424259 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_981765185400135, fake_2722815214915977, fake_6240789645183613, fake_9799866558331027, fake_9721379649726021 result, different session: fake_981765185400135, fake_2722815214915977, fake_6240789645183613, fake_9799866558331027, fake_9721379649726021 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_915187392218636, fake_5930145335278065, fake_7966985529487296, fake_5706600080613384, fake_04171139638457788 result, different session: fake_915187392218636, fake_5930145335278065, fake_7966985529487296, fake_5706600080613384, fake_04171139638457788 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_4338706918464035, fake_5280412654636442, fake_30183770828796774, fake_3993168360250381, fake_10524389249370336 result, different session: fake_4338706918464035, fake_5280412654636442, fake_30183770828796774, fake_3993168360250381, fake_10524389249370336 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_7472389499816658 result, different session: fake_12479208425637434 unsupported: false passed: true test failed: false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_13401390524090795, fake_03680371357874157, fake_054218784640524875, fake_9699131397321643, fake_3443092918074544 result, different session: fake_09090962719146245, fake_10808898161758984, fake_9048996255602906, fake_48123489471633407, fake_8948804051297596 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_018505779432891112, fake_9355059644582016, fake_9365905933221561, fake_040121047640833574, fake_5132980277833161 result, different session: fake_018505779432891112, fake_9355059644582016, fake_9365905933221561, fake_040121047640833574, fake_5132980277833161 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_8794089621943719, fake_696049879690559, fake_5609465072770867, fake_01637955290662796, fake_8510638848346204 result, different session: fake_8794089621943719, fake_696049879690559, fake_5609465072770867, fake_01637955290662796, fake_8510638848346204 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_17147263812254265, fake_007357863929807529 result, different session: fake_0901208584037485, fake_9705854347514358 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_7356085877590417, fake_9280503966918958, fake_10100708524598723, fake_4782887157844493, fake_12502638734336635 result, different session: fake_7356085877590417, fake_9280503966918958, fake_10100708524598723, fake_4782887157844493, fake_12502638734336635 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_05676022799065472, fake_5065507488131578, fake_03517678197127583, fake_6580078042359963, fake_01646498847862654 result, different session: fake_05676022799065472, fake_5065507488131578, fake_03517678197127583, fake_6580078042359963, fake_01646498847862654 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
favicon cache
A favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites. |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 2, 1 result, different session: 1, 1, 1, 2, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 2, 2, 2, 2, 2 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
fetch cache
When a resource is received via the Fetch API, it is frequently cached. That cache can potentially be abused for cross-site tracking. |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
iframe cache
An iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
image cache
Caching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
indexedDB
The IndexedDB API exposes a transactional database to web pages. That database can be used to track users across websites, unless it is partitioned. |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_3p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p, a4208d20-99b0-4e14-8a6f-62eda848d435_3p, 0fc43b05-93de-4898-990f-5d0352927a8d_3p, 62edda60-1774-48e0-b6e1-52259766cca0_3p result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_3p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p, a4208d20-99b0-4e14-8a6f-62eda848d435_3p, 0fc43b05-93de-4898-990f-5d0352927a8d_3p, 62edda60-1774-48e0-b6e1-52259766cca0_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: undefined result, different session: undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_3p, b842620f-65bb-4ec2-b89b-888354862fbc_3p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_3p, b842620f-65bb-4ec2-b89b-888354862fbc_3p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_3p result, different session: undefined unsupported: false passed: true test failed: false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure result, different session: Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_3p, 67391a77-7359-4b4a-a575-5d0865e50d35_3p, 088c23ed-84e6-4f82-b80d-551047c771c6_3p, 9ea653f5-2526-438c-9505-018f36179296_3p, ae4a2f97-fe22-43c5-8804-f82922e7afec_3p result, different session: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure result, different session: Error: IDBFactory.open: The operation is insecure, Error: IDBFactory.open: The operation is insecure unsupported: true, true passed: undefined test failed: false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_3p, 59aa2d42-8262-4767-99e3-384619556b91_3p, 484acdad-25bb-4433-94b1-6c16d4fd390e_3p, bfc3994e-661e-4006-b356-b10ee5d44de5_3p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_3p result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_3p, 59aa2d42-8262-4767-99e3-384619556b91_3p, 484acdad-25bb-4433-94b1-6c16d4fd390e_3p, bfc3994e-661e-4006-b356-b10ee5d44de5_3p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
localStorage
The localStorage API gives websites access to a key-value database that will remain available across visits. If the localStorage API is not partitioned or blocked, it can also be used to track users across websites. |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 97c426b7-b359-4b08-b700-c379123eadbd_3p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p, a4208d20-99b0-4e14-8a6f-62eda848d435_3p, 0fc43b05-93de-4898-990f-5d0352927a8d_3p, 62edda60-1774-48e0-b6e1-52259766cca0_3p result, different session: 97c426b7-b359-4b08-b700-c379123eadbd_3p, d86dd658-0ff2-4870-ab05-f3bb419a9b69_3p, a4208d20-99b0-4e14-8a6f-62eda848d435_3p, 0fc43b05-93de-4898-990f-5d0352927a8d_3p, 62edda60-1774-48e0-b6e1-52259766cca0_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p result, different session: 53f07b6a-da16-4de8-82b2-3bca13302161_3p, cf5b2e6b-a78d-45cb-b7ea-433c997f365f_3p, 558012cd-bf8c-453c-b0fc-6ceaea887a41_3p, dbc600f4-7b97-4314-a4c7-ce77a826aad5_3p, 3830852b-eaf9-49ee-9612-368175afa763_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p result, different session: 3e380705-3e60-4543-80d4-6abfc3aa00f3_3p, e2dad053-92dc-4c83-9e12-04c860fec5de_3p, 61430277-80cf-48b3-80d9-237145c0d8e7_3p, a7a04a2f-1201-457e-95aa-b3e5d802c26e_3p, 2babac8c-264d-48db-9b44-49b8dd8b969a_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: a39c5346-059d-4510-82d8-8bfea461cc17_3p, b842620f-65bb-4ec2-b89b-888354862fbc_3p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p result, different session: a39c5346-059d-4510-82d8-8bfea461cc17_3p, b842620f-65bb-4ec2-b89b-888354862fbc_3p, 36351bfd-bc1c-4c77-8d91-d8174c0158fc_3p, 5bfe7a9f-ae89-417d-bcd2-7b80b6274dbc_3p, 860e45d2-381a-47a9-b5cd-0e37c0d03f02_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 8c504876-2866-4a4b-8536-4585bf85bf64_3p result, different session: null unsupported: false passed: true test failed: false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p result, different session: ae90fe05-7add-4506-b4a6-05b0ff09727b_3p, d8ac5859-fdee-4da8-acc0-87a464f5b23d_3p, 4b92c79e-6cdd-4ff2-af83-d23ad10deadf_3p, 19b61752-c8c9-426e-8bc1-e57591cb6549_3p, 3d284730-6018-4426-9233-ba55b5edacf4_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: e9ea0ac4-a45d-421f-961c-6e9e14000a44_3p, 67391a77-7359-4b4a-a575-5d0865e50d35_3p, 088c23ed-84e6-4f82-b80d-551047c771c6_3p, 9ea653f5-2526-438c-9505-018f36179296_3p, ae4a2f97-fe22-43c5-8804-f82922e7afec_3p result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: Error: The operation is insecure., Error: The operation is insecure. result, different session: Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true passed: undefined test failed: false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 97ead046-45c5-401d-b63c-5ccc239dd543_3p, 59aa2d42-8262-4767-99e3-384619556b91_3p, 484acdad-25bb-4433-94b1-6c16d4fd390e_3p, bfc3994e-661e-4006-b356-b10ee5d44de5_3p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_3p result, different session: 97ead046-45c5-401d-b63c-5ccc239dd543_3p, 59aa2d42-8262-4767-99e3-384619556b91_3p, 484acdad-25bb-4433-94b1-6c16d4fd390e_3p, bfc3994e-661e-4006-b356-b10ee5d44de5_3p, 50851283-1da0-4339-927f-2aa4fdc2fc6e_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p result, different session: 204fbf6e-3b84-4138-b1da-b71b5d502669_3p, affb069f-fe25-4ffe-9450-ebb304b44fba_3p, 8de0c3d7-f222-460e-ab1b-5ba012cbd6a3_3p, b8d656a3-d542-43f6-86e8-0b843648eb8d_3p, 8b37f004-4d17-4386-a388-9cfc59051659_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
prefetch cache
A <link rel='prefetch'...> suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites. |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received result, different session: Error: No requests received unsupported: true passed: undefined test failed: false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received unsupported: true, true passed: undefined test failed: false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
script cache
Caching of scripts in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let script = document.createElement("script"); document.body.appendChild(script); script.addEventListener("load", () => resolve(key), {once: true}); script.src = testURI("resource", "script", key); }) read: async (key) => { let script = document.createElement("script"); document.body.appendChild(script); let scriptLoadPromise = new Promise((resolve, reject) => { script.addEventListener("load", resolve, {once: true}); }); script.src = testURI("resource", "script", key); await scriptLoadPromise; let response = await fetch( testURI("ctr", "script", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1 result, different session: 2 unsupported: false passed: true test failed: false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1 result, different session: 2, 2 unsupported: false, false passed: true, true test failed: false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
DNS privacy testsWhich browsers keep their DNS queries encrypted?
The Domain Name System (DNS) is the method by which web browsers look up the IP address for each website you visit. In a DNS query, a web browser will ask a DNS resolver (somewhere on the internet) for the IP address corresponding to a domain name (such as nytimes.com) for a website you want to visit. Traditionally, most web browsers have sent their DNS queries unencrypted, which means your ISP or anyone else on the network between your computer and the DNS resolver can eavesdrop on the websites you visit. In recent years, web browsers and operating systems have begun to introduce encrypted DNS, including the DNS over HTTPS (DoH) protocol, to encrypt the DNS request from your browser and the response from the resolver to keep your browsing history from leaking. These tests check whether a browser is still protecting its DNS requests by sending them encrypted. |
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Location: Brazil
Checks whether the browser decides to use encrypted DNS if the computer is located in Brazil. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
Location: China
Checks whether the browser decides to use encrypted DNS if the computer is located in China. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
Location: Germany
Checks whether the browser decides to use encrypted DNS if the computer is located in Germany. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
Location: India
Checks whether the browser decides to use encrypted DNS if the computer is located in India. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
Location: Nigeria
Checks whether the browser decides to use encrypted DNS if the computer is located in Nigeria. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
Location: Russia
Checks whether the browser decides to use encrypted DNS if the computer is located in Russia. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
Location: United States
Checks whether the browser decides to use encrypted DNS if the computer is located in United States. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, true, true, false, false leak detected: true, false, false, true, true |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
OS DNS: Cloudflare
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Cloudflare. |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true leak detected: false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
OS DNS: Comodo
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Comodo. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false leak detected: true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
OS DNS: Google
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Google. |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true leak detected: false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
OS DNS: Quad9
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Quad9. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true leak detected: false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true leak detected: false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |