(default settings)
|
brave 1.61 |
chrome 120.0 |
edge 120.0 |
firefox 121.0 |
librewolf 121.0-1 |
mullvad 13.0 |
opera 106.0 |
safari 17.2 |
tor 13.0 |
ungoogled 120.0 |
vivaldi 6.5 |
---|---|---|---|---|---|---|---|---|---|---|---|
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. | |||||||||||
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 result, different first party: h2, h2, h2, h2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: h2, h2, h2, h2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: h2, h2, h2, h2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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: 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 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 result, different first party: h2, h2, h2, h2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 result, different first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb 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. unsupported: false, false, false, false passed: true, true, true, true test failed: 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 result, different first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 result, different first party: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false passed: true, true, true, true test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false passed: true, true, true, true test failed: 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: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 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') unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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 first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 result, different first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: Error: The operation is insecure., Error: The operation is insecure. result, different first party: 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 result, different first party: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 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') unsupported: false, false, false, false passed: true, true, true, true test failed: 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 1095b4c5-c2b2-47e0-8db2-65feaa709195_http, 67b49f9b-a50d-4abd-8700-39eae6008cac_http, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_http, 9969e975-3b4c-42c3-bd1f-96529e100e5d_http result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_http, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_http, e6177fbe-aa24-4cde-b396-056291211e56_http, 5fa493ff-7417-4537-81ca-45012dc3ad60_http, 81b83cf7-f396-4894-948c-244a40942735_http result, different first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_http, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_http, e6177fbe-aa24-4cde-b396-056291211e56_http, 5fa493ff-7417-4537-81ca-45012dc3ad60_http, 81b83cf7-f396-4894-948c-244a40942735_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 106204b4-c822-4c4d-965c-b827fc572d5f_http, 62518c05-fa03-4cde-8884-8abc7354cb5c_http, 2b52533e-2792-4328-a141-e6291fd0d163_http, fa07c854-49de-4c41-8e37-9af2eae99850_http result, different first party: 106204b4-c822-4c4d-965c-b827fc572d5f_http, 62518c05-fa03-4cde-8884-8abc7354cb5c_http, 2b52533e-2792-4328-a141-e6291fd0d163_http, fa07c854-49de-4c41-8e37-9af2eae99850_http unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: f3d4573a-3662-4541-89b9-1591d26bedf4_http, c9f400b5-24e7-474f-9f14-568da2ee6788_http, 7d503cdb-7b08-471f-980e-7c8d56d05239_http, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_http result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 5642effc-7665-4cb9-8b9e-7f43cda7eff6_http, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707_http, a0b140d3-d593-4ab9-bc87-55965bdb9968_http, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8_http, 82543b0c-37ca-43d1-8c56-27a410058c34_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c_http, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f_http, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a_http, 0bc233d6-b4ac-4c9d-9b33-864656aaede8_http, 37cffb97-291e-4286-bb47-cc946ff15864_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345_http, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_http, 36eb090a-c192-453b-9587-4ac47e0fb44e_http, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_http, 2862e714-4ac7-46da-81a8-913895bba901_http result, different first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345_http, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_http, 36eb090a-c192-453b-9587-4ac47e0fb44e_http, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_http, 2862e714-4ac7-46da-81a8-913895bba901_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 8bb48553-d721-4780-8f78-b09777cbfc24_http, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_http, 218746da-3103-4db3-b751-9c93f6eff5e7_http, eff30dad-ed29-454a-bd9f-c3e29b245b1e_http, 0db44723-4eb1-44ef-89a1-bb062a9fab52_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 9cbba4db-cccc-431a-91cc-2e7d4492552e_http, ed46bf99-731d-43d9-87eb-a6c0c56b50a8_http result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 1f781983-109b-431d-9f01-082c4fc81e57_http, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_http, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_http, 2c6f5493-f82c-433e-9928-0a73dcce58a2_http, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: fea73457-ab1a-4106-b0ae-dbd12477cff0_http, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_http, 25e332ba-d729-4f3f-a43b-ace2be2221da_http, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_http result, different first party: fea73457-ab1a-4106-b0ae-dbd12477cff0_http, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_http, 25e332ba-d729-4f3f-a43b-ace2be2221da_http, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_http unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 1095b4c5-c2b2-47e0-8db2-65feaa709195_js, 67b49f9b-a50d-4abd-8700-39eae6008cac_js, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_js, 9969e975-3b4c-42c3-bd1f-96529e100e5d_js result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_js, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_js, e6177fbe-aa24-4cde-b396-056291211e56_js, 5fa493ff-7417-4537-81ca-45012dc3ad60_js, 81b83cf7-f396-4894-948c-244a40942735_js result, different first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_js, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_js, e6177fbe-aa24-4cde-b396-056291211e56_js, 5fa493ff-7417-4537-81ca-45012dc3ad60_js, 81b83cf7-f396-4894-948c-244a40942735_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 106204b4-c822-4c4d-965c-b827fc572d5f_js, 62518c05-fa03-4cde-8884-8abc7354cb5c_js, 2b52533e-2792-4328-a141-e6291fd0d163_js, fa07c854-49de-4c41-8e37-9af2eae99850_js result, different first party: 106204b4-c822-4c4d-965c-b827fc572d5f_js, 62518c05-fa03-4cde-8884-8abc7354cb5c_js, 2b52533e-2792-4328-a141-e6291fd0d163_js, fa07c854-49de-4c41-8e37-9af2eae99850_js unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: f3d4573a-3662-4541-89b9-1591d26bedf4_js, c9f400b5-24e7-474f-9f14-568da2ee6788_js, 7d503cdb-7b08-471f-980e-7c8d56d05239_js, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_js result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 5642effc-7665-4cb9-8b9e-7f43cda7eff6_js, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707_js, a0b140d3-d593-4ab9-bc87-55965bdb9968_js, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8_js, 82543b0c-37ca-43d1-8c56-27a410058c34_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 5d608609-73f8-4ee0-bfe8-5668cbfef85c_js, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f_js, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a_js, 0bc233d6-b4ac-4c9d-9b33-864656aaede8_js, 37cffb97-291e-4286-bb47-cc946ff15864_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345_js, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_js, 36eb090a-c192-453b-9587-4ac47e0fb44e_js, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_js, 2862e714-4ac7-46da-81a8-913895bba901_js result, different first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345_js, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_js, 36eb090a-c192-453b-9587-4ac47e0fb44e_js, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_js, 2862e714-4ac7-46da-81a8-913895bba901_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 8bb48553-d721-4780-8f78-b09777cbfc24_js, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_js, 218746da-3103-4db3-b751-9c93f6eff5e7_js, eff30dad-ed29-454a-bd9f-c3e29b245b1e_js, 0db44723-4eb1-44ef-89a1-bb062a9fab52_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 9cbba4db-cccc-431a-91cc-2e7d4492552e_js, ed46bf99-731d-43d9-87eb-a6c0c56b50a8_js result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 1f781983-109b-431d-9f01-082c4fc81e57_js, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_js, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_js, 2c6f5493-f82c-433e-9928-0a73dcce58a2_js, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: fea73457-ab1a-4106-b0ae-dbd12477cff0_js, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_js, 25e332ba-d729-4f3f-a43b-ace2be2221da_js, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_js result, different first party: fea73457-ab1a-4106-b0ae-dbd12477cff0_js, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_js, 25e332ba-d729-4f3f-a43b-ace2be2221da_js, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_js unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 result, different first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true passed: undefined test failed: 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, 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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 result, different first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 unsupported: false, false, false, false passed: false, false, false, false test failed: 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_46470252837450876, fake_163832485687039, fake_36395885410946116, fake_6347571736670972 result, different first party: fake_5670837700433724, fake_8377750884444697, fake_7829792297673277, fake_4307380334436839 unsupported: false, false, false, false passed: true, true, true, true test failed: 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_7096892843000737, fake_012404535999884114, fake_5283091819311097, fake_17998140747308988, fake_18707581030107767 result, different first party: fake_188322312553173, fake_3525705265495509, fake_035551250240448695, fake_5033478522232899, fake_19592559363249196 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_7073472449543206, fake_6853240553675661, fake_9359527321984893, fake_21953634722837245 result, different first party: fake_19089427626037048, fake_30342687628232223, fake_169196614902259, fake_6577109983749303 unsupported: false, false, false, false passed: true, true, true, true test failed: 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_05573086463214083, fake_966003463547539, fake_948979720175325, fake_636052396069003 result, different first party: fake_45321476459213716, fake_6353379921960665, fake_3461843536274458, fake_3454377571660454 unsupported: false, false, false, false passed: true, true, true, true test failed: 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_3731255434744203, fake_6189759491929487, fake_3177541526972658, fake_02767239454972037, fake_9775635752812362 result, different first party: fake_5224559542793092, fake_03455036444612869, fake_4881003070376344, fake_128746161930547, fake_9877312485856864 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_6880228572095193, fake_9985674757530205, fake_21800062699232314, fake_7058338270334339, fake_49748097601188324 result, different first party: fake_019105377119495337, fake_9026475907826099, fake_34384473864483045, fake_9189916155011681, fake_1128643508446936 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_9740476335138271, fake_008262475094727106, fake_8223442690619995, fake_9131635670536824, fake_29698195219297263 result, different first party: fake_544330213066148, fake_879733616390332, fake_20831591220502266, fake_20707470494027724, fake_14222960028605436 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_7065627199280757, fake_5156367439569514, fake_9045525579546803, fake_478883538060382, fake_8314752325010208 result, different first party: fake_09981817857341602, fake_3467691667169095, fake_8883685978733249, fake_01775904762870817, fake_9821440400100134 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_6701215909249645, fake_6043131132391948 result, different first party: fake_6205194940359575, fake_7360637193751405 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_3619078433928524, fake_17269147090475023, fake_535266489675861, fake_7225324974075131, fake_26544945512827733 result, different first party: fake_9200361858377557, fake_5696075540050933, fake_7665162833433516, fake_6697545027078293, fake_684087720219277 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_9177709410677912, fake_48223415510906076, fake_977684160528852, fake_7516729989562823 result, different first party: fake_6736705838774457, fake_17209918890759224, fake_4832437151864444, fake_08908012254973752 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 2 result, different first party: 2, 2, 2, 3 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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 result, different first party: 3, 3, 3, 3 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false passed: true, true, true, true test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false passed: true, true, true, true test failed: 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: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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: 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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false passed: true, true, true, true test failed: 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 result, different first party: , unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
H2 connection
HTTP/2 is a web connection protocol introduced in 2015. Some browsers re-use HTTP/2 connections across websites and can thus be used to track users. |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: e2af2121c4ac09ecaa2a0838911f030c, 82cea66c2ae117536f520b5138ed65fa, 092b856bbe6f46f420cfb903091ed6ec, 639b39305237682fe2b51156ea9ebb68 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 7adf9677982ffcb231d70f167e2e4abc, ef595d0e76b31f6453330b51c7641c13, 476cbfcded2ec39b1e159426a3693e0a, bcc4a0c044d6b233552e52b83b9c919e, 4b82a2f4e2b50d51e725ec39f19d4299 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: f92ca2c89900538327eb824f515b2bd9, 73b93fed37026c88995b746cd2e21954, 1a1e2a7093e5a580e04e974da5c26fd2, 817cff21e8ae7574663c21c3092533fb result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: e2dbcd10dae3bf1880e4252b843e10b0, 65c6108ef12d1259f08eecfe6cf480ed, 383246e7d2a8b13952c603468f7d7479, 4a82ebf78991a74b3c450646f0b7dbf4 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: f1c188486a72c78df09db2870bc9f259, 776051746197fbd6e8ade8dba56befbe, e3fc6c09a42c6e9cdc9334a5f47b80ad, 351b05da923326f1d3ce88115fc850ed, 95a88d4eb86ab078067deac932c99959 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: c4c61accfb6e8edd996abde4e72dd291, 887a38571d5221efdd0aee8c6d1045ca, 5aa9501d676a217990cd06f23236399a, 1272f9e854550241699d5afbac00c5d5, 5f096ed65f76cf98d314a10ec76d56ee 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: 9fe475e1e6c2adca5317d18efe3d1280, 2642ba7634ae601058f471379157febc, facf97d9e9abb52001e0ce307a580935, 2122db9cbe61aa7cf155c66295cb3f09, fdbd0ca2d3990506385221aeac2cb7b0 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: , ee04e1be735a645384c7e9dc74c189ae, 9631d2d58f43dd85339d42db8383a2eb, 4723fc307389f0b444a1ed92aa6474b0, 205964d516088f9b49356ea59deac857 result, different first party: , 85740d2ca7e621fb25678940d500cc41, 798d2d1afc19ffaf4161b171c3b8b5b1, 54bdf348c3b61a6c7a0f79ecd12dbc14, d5c4174c8057bc241a5b234fdf921b46 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: , 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: 965445cd9aa6c057afe09c6fdf535bd7, e06dd90c1350c1dbb173742204736833, 65e80450973638c3f7ac3212076c8ad2, 4a9f296e726b97212d28b45861ab8ee4, 4a57cd29859d0981d9419e8e43739b13 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: c516363972609cd35f54cfbd1e81ac2c, 0208b0060c8d10c33a42c4b6ea224763, 76fed249920632f959d57c0fca8f2691, c8d05a48228290d8c6c167b423ef114b result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: Used http, Used http, Used http, Used http unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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: 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 result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different first party: Used http, Used http, Used http, Used http unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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: 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: 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: 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 result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: Error: The user denied permission to access the database., Error: The user denied permission to access the database., Error: The user denied permission to access the database., Error: The user denied permission to access the database. unsupported: false, false, false, false passed: true, true, true, true test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: undefined unsupported: false, false, false, false passed: true, true, true, true test failed: 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: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: undefined unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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 (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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 (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: undefined unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: Error: The request was denied., Error: The request was denied., Error: The request was denied., Error: The request was denied. unsupported: false, false, false, false passed: true, true, true, true test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 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') unsupported: false, false, false, false passed: true, true, true, true test failed: 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: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb 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 unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 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') unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 --> result, different first party: Error: Failed to register a ServiceWorker for scope ('https://test-pages.privacytests2.org/') with script ('https://test-pages.privacytests2.org/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://test-pages.privacytests2.org/') with script ('https://test-pages.privacytests2.org/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://test-pages.privacytests2.org/') with script ('https://test-pages.privacytests2.org/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://test-pages.privacytests2.org/') with script ('https://test-pages.privacytests2.org/serviceWorker.js'): The user denied permission to use Service Worker. unsupported: false, false, false, false passed: true, true, true, true test failed: 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: <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 passed: true, true, true, true test failed: 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 passed: undefined test failed: 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=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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, 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 --> result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: Error: no SharedWorker message received, Error: no SharedWorker message received, Error: no SharedWorker message received, Error: no SharedWorker message received unsupported: false, false, false, false passed: true, true, true, true test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false passed: true, true, true, true test failed: 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: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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 (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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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 (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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false passed: true, true, true, true test failed: 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: a91d383e74eec0276cea8d2a17cc43a37700f77118ac8667c461241f3c9b19b2, 182d0c5034b53451797b274c80deaca889a1a03a861b6eec45b814d47ce654e7, 051b4069d37bc2b44e91a8ca3c70e8eb662273238b2c6088938d09317754868c, e16bee5f01f7ab4af01ba156609878e8bd784c45b066c358e5c6773646dba4ab result, different first party: 0b909cc4d937d49e5481f4b42a72a72ce1414c8c9faccec5cd6a64c56a114fad, c44871f18f3e92dc935d97b6eebf2653435ed656f4dce23cbe4168a9e1323a45, 75541f3975e0cebbbf29f896f64fa27ec46ee6a5e2df76e401f1968cc37c66b8, 3cff57746d5ab0edb740c512e0b78653ab4d4e30a3f088bde7cbce3bd88b8873 unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 129b275872ad40dd9cbe9de4ba8f8d9b40ea46b21c7835cbf3604a3cf25b40e0, 02845e7ed0f8e8c1ce6d47ffb198638478f40dbf1b97870e04ad5911a40a710c, 151324b3ce0caa3568adfe335f778b758fde1a0b6c2fd5221c61c7b41052dfec, 25c005c7c4886317d231289e4de5b15452ac3474de284e14bbf400903f1a797b, 8c103aea87eff09fe9621ec5f33c92b961962911578440abb35c0641a908e7c5 result, different first party: fafbb65374c1d7a3b961d8e2cff753b5f711af0f6a63a9e916385b19d32501c0, bb72fcd49f20833b4f1652494415aae581434a32f5a5becbeeb7c1ae832c1ffa, 2337d2941a86d2dadf09e6cdaab9ca88d180d8550f0b4a10e9ed945847202ec4, 276cf1897fe0ac4301d274a1a77a40cc762c2383757af62cedbd7fca0026780a, 6fe421d7f1689bee7b74fe2f33c9e9d73131732d3a485848217c0a336afddf47 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: 48c8955dafd1fc5f0807cb189db90d32f257bae6edfd063382e21b639fd4fbc4, beaf6e34973c53e94209ef8a3bac8242a6487c945b8b0f20aa1c1fddad57e863, d90d329e8ce57254729fca779966de8c2364e4affaca2c276ffa061cd34f7e95, 0610056aaddb89af5b9e75cbd85d12b33b727e7e22a6a0f5a27f44a6aa2b4a58 result, different first party: b02147646101c42905977e3cea5d70d2eb6b5eaf99d2dbd4cb26dccaa65d4b36, f7b7396a53642d5ddc15607ec0a841a4376bb29b70a8f0e8c4c89c9c6a8d7ae5, 93c4d32ee34a046ce2e688a172a832addbd82ca8b2cb8aa54fdfb55ebe485d4e, 87793063d3d9914031150661a807d46eac5e3367bf1741e9d7de9fbb018b61c3 unsupported: false, false, false, false passed: true, true, true, true test failed: 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: a751a7e956d7f96d854744bf2f533a9acf97e433475fe77091d0fc9dd1a26b67, f00442468a83f639c3df5c1d645e15e8d27b8b4c8479886b2d8d4867f89fcf7f, 4c621ab70c692f23544263bf2230799029b5726a489f7ac108845c370bd5582a, 1ca10db2fb5d1f1ab7f4ff08136c60f5cd4d1b075d09c00d2965541df1b57229 result, different first party: 5d1eb46f60c83d36957dec48da2e97566ae34916c1db19b629a1608c721a2c08, 605da623bb4d9681908efddfe61404f22cca2ef3c2f93398781cb5ca29379d95, 032e7cabcde25ad1539a240e2bac54d23554f665879cd747fad4039c05bbff13, 60bade28475f29d4d1942d9a196a06a8e8a5ba06235f1eea310133cf8f9af610 unsupported: false, false, false, false passed: true, true, true, true test failed: 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: f68eee670752b58b00058a82b475d1315e710ee2883d6940bea83f5eeec19d2a, 773c4ba28f91ef98dc08edbb550c4ff2aa62f6710158e650b50eb7c788e66f90, 3f9a3c737a0b6888f8ab21471aef18040b5ed37a80d33d8d34e335a1c6803625, c3df7ae4504ab28bd0680df10933488fee68c7501aa58f7df8337595e379a872, 9937bbbc8da574a087abaa1e38bd99f6ee821cd9db6d8a77a50f66b0198ea86e result, different first party: e32017625b4f2ff389547024702543a380dc322addc7b416b2fc22b8c79fe67b, 2101d2b1ba58036ca5b4ff7ae47146c1fd48b6b57174406c37b22c4cf28124f6, 3e586940c9d5657ada54896530017e56c7ce0ad653539177a1152aa5d3da8b51, 425f5669c766abff0f6a0154bf45388b5407110c860ff51db0db0ffb861b7c24, a25ceb1a86ad6a889ec1f19490ffe84201316f7f247bdfc33a2094893012bfdf 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: 034f1d9bc9cb3b48df1497a3bf442237c844660af68299a28320d574f77c2a74, ffff9b2a8380bdd12b6a916d51b21b45ae4d801023a2c85ade332ad57d061dfd, 65036d2aa3cd5ada71f5e775f2c9d9366e66f41707c7186f288c212195c4ae77, 815b4f3df20c159464c9bf3b769e5ee1d3b8c06e38e4d066e65f10ff0378ef42, d183ddb11e93aece9d2b296fe93287de33ecb76c5c967347f1f135fdbe94e73a result, different first party: 11f3e01a4cbda7fc705bd29640e97bea4fefa5e342dcf440d19df3450a818af2, caab3ad6df0a91effbf90bfcaa4abedb206df3144edaf0b327f3f8525cd7d2f0, 3198d01f0ccc6ff018d8c6f99caf084b1ad0866b551e1eb16f347407740bfb71, 2e40994bf1722e025a3f3c79d7c3f3e2d7202a944d134c105d6ee3fcdcb2fe37, 4535feb8ed461ffc755f5850ce95b00791adb5a0cbfdd7edc22dec770753778d 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: 801081f750d9fdd22aa3a60a03c505f203e0d4d31cae7237f4d71e3ad1823fc4, 4bce0472c52b320f7a116ac39f6981a4cc6a6a5bc2d95f033b23c139749b678d, 0228291eed88f552473cd50e560bad11ae119b470819ecb8a234576041ed6efd, e177ece03fa258ebdb8a52821b5c58f3a5566271c8084aad75558a1f9025c2e0, 4211522947fec9f20c23c6c5d7d34f208e2ef03d8b5daf9c50cd07a0d7a36f3e result, different first party: 9248e62a0ba4645236e0d01cf63c62054e83c87239cb3ac0d8545749b8694933, b41aa0c673f5dfa39db5ca9375d698fd20608be9d8ef9d64ef40e5cd8633d4a3, 38b258881a900c32f7552173d519cb820588515fa14216beea6493ade427840d, 874a20a282184832c64dfa11c1cf387073cfb8e062f1cb7e6e64e56cc175ca90, 1d39422d3550fe1d601c129c8e0562a713ab896c92ec3500e973b81025ccba24 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: 6a8ed6a9392c6ee5a6ff43cf0bbab3c0a3058d76a00f20b7bcd44517e3948343, b83f27e583c9e1c5162340565c7b6eab045fee1e8bbc5196838aa160b10c93fe, a5a4cb4f899602e997f46d033f5d5bf09376627903b0fac1c7165571c2e5c240, 76201edf65c7841c5204da659384367b1318c9ce651bbe08e08420d7b929e768, e838982e3a1ff8958a6a6964237e4abe000a03e14ae6d1b1edf8f5aa1b873352 result, different first party: 215a850dd2e21d806dc04aeed73a13735882e8f9aabd00d55b468e1c5e5f9db2, fb39d7d3fa81e36ef1b4d24434f888d0dc308e205936742164402b5c477a96b7, c004215296d6ecdd6675d467d97f3715268699071aedebcb6ef2e82ec8ae9780, f6757a197fb9750a4743c9a053351ef2b658a647867591845df929a3ba8e26a1, 832294b3cd4e5b5edbe7712b45d491081955024576c3433d35485bd0a08d1161 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: 664733bc9a0725b8a82038349a4299332ad81e01b3a9feb76714e8ddd3058fa2, 118549436717a8caed58343ac97440b65cf9d94ddfcaee90069df94edfac233d result, different first party: 9df2b722dbdef9e4fb2f97cddf99901d4042e6a16de1f23968f2374d0af9e3a8, f544f3108a7fa6ed6a75fac53f582820e315a06bd0c050ce588dbdc0345ea107 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: a88fddfd156d01043f7ae88ad7119fba6f2765e834439e828a5c754cec7a8e24, 651ac657b443e307f9bce04af788fa663b0da139490f76ffbb24d0721ae61c42, ef536a9a45a283608e5662e508cb8aa50ec9d7234f5c678ee2bc89a72054785d, 9e75911e3e7bf9e709ee9ab732c8caffb0f169f771fbe3e1c3cc32fdc4589502, ce61f00b5223969b1553cbbc79f998b01af21758e7d68af3f6213a4caf15620c result, different first party: 3d62d46217a5b426e05d4e12b6a805413659d3d52653351ada0a079a71bd9b57, 5ce76bbf0e143bbac1a25c1bb8d87803555ede1e3eb0d6bae6f2ff00fc1946ad, 0812306f7e8f223c384d1fe5f7e80d005151b73fa95d6b293f1b1b2014121356, 62052c1fe691734e277a4f817195b25dd5646df1fd6b12cc391996adce69bf96, 0721eb3bfd7e1e1e4234cfec923b27b72dc6411d7886c34af7b65c4bd43205be 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: 3395ac076d0df406c91677b2625920e9e09b0f31f13c4861ceb77e327bdaf103, 2eb5a9d47c213e250c5cce0359565b8fa76390cd586791c43ac16097cbae104f, a294f3dc5dd70838c1ad1ad34e19344ea49946848bf60c800344eb80f6d24847, 01cf5a1a1a84f9090867e82085dae6bf4ba1f1347c56dcd5371ba6d621ba274f result, different first party: 0a1b3250e037827058b80b24a9dbeb0a7ba4cec2977d961f7ee18ed08ae9f093, e7efcc737832145fa00a884063610ce2388e34e35c0312361a9cc2b96c4811ce, cf69a42d3d2b7ba1f69eaa4c8f65a8dd7f0823914905bd270e8e21f713f1e9c5, ad0fd0f300a078289a0e16801021446500e8b8b37aa88f0e2dd2b7b5c0101160 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
Web SQL Database
The Web SQL Database is a deprecated web API for storing data in an SQL database. |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false passed: undefined test failed: true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false passed: undefined test failed: true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false passed: undefined test failed: true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated result, different first party: Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false passed: undefined test failed: true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false passed: undefined test failed: true, true, true, true |
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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: 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.', | |||||||||||
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/ result, different first party: 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 passed: false, false, false, false test failed: 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/ result, different first party: 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 passed: false, false, false, false test failed: 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/ result, different first party: 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 passed: false, false, false, false test failed: 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/, 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/ result, different first party: 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 passed: false, false, false, false test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195, 67b49f9b-a50d-4abd-8700-39eae6008cac, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2, 9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: c61b66b6-5f6f-4479-bbbe-d910f1c4a242, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be, e6177fbe-aa24-4cde-b396-056291211e56, 5fa493ff-7417-4537-81ca-45012dc3ad60, 81b83cf7-f396-4894-948c-244a40942735 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: 106204b4-c822-4c4d-965c-b827fc572d5f, 62518c05-fa03-4cde-8884-8abc7354cb5c, 2b52533e-2792-4328-a141-e6291fd0d163, fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: f3d4573a-3662-4541-89b9-1591d26bedf4, c9f400b5-24e7-474f-9f14-568da2ee6788, 7d503cdb-7b08-471f-980e-7c8d56d05239, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 5642effc-7665-4cb9-8b9e-7f43cda7eff6, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707, a0b140d3-d593-4ab9-bc87-55965bdb9968, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, 82543b0c-37ca-43d1-8c56-27a410058c34 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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a, 0bc233d6-b4ac-4c9d-9b33-864656aaede8, 37cffb97-291e-4286-bb47-cc946ff15864 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: 1ac417a7-e448-45f0-9603-c61ec3f8b345, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, 36eb090a-c192-453b-9587-4ac47e0fb44e, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, 2862e714-4ac7-46da-81a8-913895bba901 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: 8bb48553-d721-4780-8f78-b09777cbfc24, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, 218746da-3103-4db3-b751-9c93f6eff5e7, eff30dad-ed29-454a-bd9f-c3e29b245b1e, 0db44723-4eb1-44ef-89a1-bb062a9fab52 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: 9cbba4db-cccc-431a-91cc-2e7d4492552e, ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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: 1f781983-109b-431d-9f01-082c4fc81e57, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0, 2c6f5493-f82c-433e-9928-0a73dcce58a2, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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: fea73457-ab1a-4106-b0ae-dbd12477cff0, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, 25e332ba-d729-4f3f-a43b-ace2be2221da, 636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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_1095b4c5-c2b2-47e0-8db2-65feaa709195, name_67b49f9b-a50d-4abd-8700-39eae6008cac, name_9c5e4a2f-69aa-42ee-aff8-00cf689280f2, name_9969e975-3b4c-42c3-bd1f-96529e100e5d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_c61b66b6-5f6f-4479-bbbe-d910f1c4a242, name_1a21bd10-857e-4b30-bd9f-e0ed001bf2be, name_e6177fbe-aa24-4cde-b396-056291211e56, name_5fa493ff-7417-4537-81ca-45012dc3ad60, name_81b83cf7-f396-4894-948c-244a40942735 result, different first party: name_c61b66b6-5f6f-4479-bbbe-d910f1c4a242, name_1a21bd10-857e-4b30-bd9f-e0ed001bf2be, name_e6177fbe-aa24-4cde-b396-056291211e56, name_5fa493ff-7417-4537-81ca-45012dc3ad60, name_81b83cf7-f396-4894-948c-244a40942735 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_106204b4-c822-4c4d-965c-b827fc572d5f, name_62518c05-fa03-4cde-8884-8abc7354cb5c, name_2b52533e-2792-4328-a141-e6291fd0d163, name_fa07c854-49de-4c41-8e37-9af2eae99850 result, different first party: name_106204b4-c822-4c4d-965c-b827fc572d5f, name_62518c05-fa03-4cde-8884-8abc7354cb5c, name_2b52533e-2792-4328-a141-e6291fd0d163, name_fa07c854-49de-4c41-8e37-9af2eae99850 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_f3d4573a-3662-4541-89b9-1591d26bedf4, name_c9f400b5-24e7-474f-9f14-568da2ee6788, name_7d503cdb-7b08-471f-980e-7c8d56d05239, name_7d335416-6a49-4da5-8a6d-eb655fa2d0fb result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_5642effc-7665-4cb9-8b9e-7f43cda7eff6, name_2d3fe1ab-5fb0-419f-890f-c34b13e6a707, name_a0b140d3-d593-4ab9-bc87-55965bdb9968, name_9a9d5b43-dea0-496c-89e0-75cdaa2d72e8, name_82543b0c-37ca-43d1-8c56-27a410058c34 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_5d608609-73f8-4ee0-bfe8-5668cbfef85c, name_b4ed6530-6b24-4f84-8f0d-2f23148b2c6f, name_85d6aa10-b22b-47ed-9997-9bb68ad7a26a, name_0bc233d6-b4ac-4c9d-9b33-864656aaede8, name_37cffb97-291e-4286-bb47-cc946ff15864 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_1ac417a7-e448-45f0-9603-c61ec3f8b345, name_7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, name_36eb090a-c192-453b-9587-4ac47e0fb44e, name_ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, name_2862e714-4ac7-46da-81a8-913895bba901 result, different first party: name_1ac417a7-e448-45f0-9603-c61ec3f8b345, name_7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c, name_36eb090a-c192-453b-9587-4ac47e0fb44e, name_ca982fd0-e8ff-445d-a15c-e8ac1d6cb067, name_2862e714-4ac7-46da-81a8-913895bba901 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_8bb48553-d721-4780-8f78-b09777cbfc24, name_33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f, name_218746da-3103-4db3-b751-9c93f6eff5e7, name_eff30dad-ed29-454a-bd9f-c3e29b245b1e, name_0db44723-4eb1-44ef-89a1-bb062a9fab52 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_9cbba4db-cccc-431a-91cc-2e7d4492552e, name_ed46bf99-731d-43d9-87eb-a6c0c56b50a8 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_1f781983-109b-431d-9f01-082c4fc81e57, name_9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, name_0c5f7117-5e93-4b7f-b49b-d254238fd3a0, name_2c6f5493-f82c-433e-9928-0a73dcce58a2, name_98bf4063-d303-475d-b01d-3e4dbb2dcbe7 result, different first party: name_1f781983-109b-431d-9f01-082c4fc81e57, name_9c56c899-d156-4e5a-8e2e-d0e44f4f33d9, name_0c5f7117-5e93-4b7f-b49b-d254238fd3a0, name_2c6f5493-f82c-433e-9928-0a73dcce58a2, name_98bf4063-d303-475d-b01d-3e4dbb2dcbe7 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_fea73457-ab1a-4106-b0ae-dbd12477cff0, name_7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, name_25e332ba-d729-4f3f-a43b-ace2be2221da, name_636949e8-d7aa-4d97-a66c-e3089de2d3c7 result, different first party: name_fea73457-ab1a-4106-b0ae-dbd12477cff0, name_7e4d381d-c79a-49fd-a6b3-4bcb60ba4778, name_25e332ba-d729-4f3f-a43b-ace2be2221da, name_636949e8-d7aa-4d97-a66c-e3089de2d3c7 unsupported: false, false, false, false passed: false, false, false, false test failed: 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.` | |||||||||||
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 result: 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 result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded |
passed: false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website 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: 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 result: 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 passed: true,true,true,true |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: true,true,true,true passed: true,true,true,true |
upgraded: false,false,false,false passed: false,false,false,false |
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: 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 passed: 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 passed: true,true,true,true |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: true,true,true,true passed: true,true,true,true |
upgraded: false,false,false,false passed: false,false,false,false |
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: 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 passed: 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 result: upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true result: upgraded,upgraded,upgraded,upgraded |
passed: false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely |
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: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely |
passed: true,true result: upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true result: 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 result: blocked,blocked,blocked,blocked |
passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked |
passed: true,true,true,true result: blocked,blocked,blocked,blocked |
passed: true,true,true,true result: blocked,blocked,blocked,blocked |
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: 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 result: blocked,blocked,blocked,blocked |
Misc testsWhich browsers provide additional assorted privacy protections?
This category includes tests for the presence of miscellaneous privacy features | |||||||||||
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 |
SNI_status: encrypted passed: true,true,true,true,true |
SNI_status: encrypted passed: true,true,true,true |
SNI_status: plaintext passed: false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
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,false |
SNI_status: plaintext passed: false,false |
SNI_status: encrypted passed: true,true,true,true,true |
SNI_status: encrypted passed: 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 |
header value: undefined passed: false,false,false,false,false |
header value: undefined passed: false,false,false,false |
header value: undefined passed: 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: undefined passed: false,false,false,false,false |
header value: undefined passed: false,false |
header value: undefined passed: false,false,false,false,false |
header value: undefined passed: 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 |
passed: false,false,false,false,false |
passed: false,false,false,false |
passed: 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,false |
passed: false,false,false,false,false |
passed: 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 |
passed: false,false,false,false,false |
passed: false,false,false,false |
passed: 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: true,true |
passed: false,false,false,false,false |
passed: 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 readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: 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 readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: 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 readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: 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: false,false readSameFirstParty: 2a0b:f4c0:16c:12::1,2a0b:f4c2::1 readDifferentFirstParty: 2605:aa80:0:9::3,2602:fc24:13:e::1234 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 readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: 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 passed: false,false,false,false |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,false,false,false passed: false,false,false,false |
IsTorExit: false,false,false,false passed: 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: true,true passed: true,true |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,false,false,false passed: 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: 1300,1298,1297,1301 desired value: undefined passed: 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 desired value: undefined passed: false,false,false,false |
expression: undefined desired expression: undefined actual value: 1440,1440,1440,1440 desired value: undefined passed: false,false,false,false |
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: 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 desired value: undefined passed: false,false,false,false |
Media query screen width
Width of the user's screen in pixels. |
expression: undefined desired expression: undefined actual value: 1201,1208,1205,1200 desired value: undefined passed: 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 desired value: undefined passed: false,false,false,false |
expression: undefined desired expression: undefined actual value: 2560,2560,2560,2560 desired value: undefined passed: false,false,false,false |
expression: undefined desired expression: undefined actual value: 1600,1600,1600,1600,1600 desired value: undefined passed: true,true,true,true,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 desired value: undefined passed: false,false,false,false |
outerHeight
Height of the browser window in pixels, including browser chrome. |
expression: outerHeight desired expression: undefined actual value: 1300,1298,1297,1301 desired value: undefined passed: 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: 1371,1371,1371,1371 desired value: undefined passed: false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 1040,1040,1040,1040 desired value: undefined passed: false,false,false,false |
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: 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: 1335,1335,1335,1335,1335 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 desired value: undefined passed: false,false,false,false |
screen.height
Height of the user's screen, in pixels. |
expression: screen.height desired expression: undefined actual value: 1300,1298,1297,1301 desired value: undefined passed: 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 desired value: undefined passed: false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1440,1440,1440,1440 desired value: undefined passed: false,false,false,false |
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: 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 desired value: undefined passed: false,false,false,false |
screen.width
Width of the user's screen, in pixels. |
expression: screen.width desired expression: undefined actual value: 1201,1208,1205,1200 desired value: undefined passed: 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 desired value: undefined passed: false,false,false,false |
expression: screen.width desired expression: undefined actual value: 2560,2560,2560,2560 desired value: undefined passed: false,false,false,false |
expression: screen.width desired expression: undefined actual value: 1600,1600,1600,1600,1600 desired value: undefined passed: true,true,true,true,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 desired value: undefined passed: 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: 4,7,5,3 desired value: undefined passed: 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: 22,22,22,22 desired value: undefined passed: false,false,false,false |
expression: screenX desired expression: undefined actual value: 4,4,4,4 desired value: undefined passed: true,true,true,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: 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: 1329,1329,1329,1329,1329 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 desired value: undefined passed: 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: 1,3,4,5 desired value: undefined passed: 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: 47,47,47,47 desired value: undefined passed: false,false,false,false |
expression: screenY desired expression: undefined actual value: 25,25,25,25 desired value: undefined passed: false,false,false,false |
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: 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: 25,25,25,25,25 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 desired value: undefined passed: 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 |
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 |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: 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,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 |
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 |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
__hssc
HubSpot tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
__hstc
HubSpot tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
__s
Drip.com email address tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
_hsenc
HubSpot tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
_openstat
Yandex tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
dclid
DoubleClick Click ID (Google) |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
fbclid
Facebook Click Identifier |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
gclid
Google Click Identifier |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
hsCtaTracking
HubSpot tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
mc_eid
Mailchimp Email ID (email recipient's address) |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
mkt_tok
Adobe Marketo tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
ml_subscriber
MailerLite email tracking |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
ml_subscriber_hash
MailerLite email tracking |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
msclkid
Microsoft Click ID |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
oly_anon_id
Omeda marketing 'anonymous' customer id |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
oly_enc_id
Omeda marketing 'known' customer id |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
rb_clickid
Unknown high-entropy tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
s_cid
Adobe Site Catalyst tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
vero_conv
Vero tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
vero_id
Vero tracking parameter |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
wickedid
Wicked Reports e-commerce tracking |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
yclid
Yandex Click ID |
passed: true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
value: 6220409046356266 passed: false,false,false,false |
passed: true,true,true,true,true |
passed: true,true,true,true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: false,false,false,false,false |
passed: true,true |
value: 6220409046356266 passed: false,false,false,false,false |
value: 6220409046356266 passed: 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.` | |||||||||||
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 |
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 |
url: https://munchkin.marketo.net/munchkin.js passed: 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: 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 |
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 |
url: https://dpm.demdex.net/ibs passed: false,false,false,false,false |
url: https://dpm.demdex.net/ibs passed: false,false,false,false |
url: https://dpm.demdex.net/ibs passed: false,false,false,false |
url: https://dpm.demdex.net/ibs passed: true,true,true,true,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 |
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 |
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 |
url: https://s.amazon-adsystem.com/dcm passed: 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: 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 |
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 |
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 |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: 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: 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 |
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 |
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 |
url: https://bat.bing.com/bat.js passed: 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: 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 |
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 |
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 |
url: https://static.chartbeat.com/js/chartbeat.js passed: 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: 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 |
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 |
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 |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: 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: 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 |
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 |
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 |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: 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: 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 |
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 |
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 |
url: https://connect.facebook.net/en_US/fbevents.js passed: 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: 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 |
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 |
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 |
url: https://www.google.com/pagead/1p-user-list/ passed: 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: 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 |
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 |
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 |
url: https://google-analytics.com/urchin.js passed: 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: 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 |
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 |
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 |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: 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: 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 |
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 |
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 |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: 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: 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 |
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 |
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 |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: 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: 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 |
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 |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false |
url: https://pixel.quantserve.com/pixel passed: true,true,true,true,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 |
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 |
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 |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: 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: 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 |
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 |
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 |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: 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: 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 |
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 |
url: https://t.co/i/adsct passed: false,false,false,false,false |
url: https://t.co/i/adsct passed: false,false,false,false |
url: https://t.co/i/adsct passed: false,false,false,false |
url: https://t.co/i/adsct passed: true,true,true,true,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 |
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 |
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 |
url: https://yandex.ru/ads/system/header-bidding.js passed: 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: 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 |
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.`, | |||||||||||
Adobe
Tests whether the browser stops cookies from munchkin.marketo.net from tracking users across websites. |
passed: true,true,true,true url: https://munchkin.marketo.net/munchkin.js cookieFound: 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 url: https://munchkin.marketo.net/munchkin.js cookieFound: false,false,false,false |
passed: true,true,true,true url: https://munchkin.marketo.net/munchkin.js cookieFound: 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: false,false,false,true,false url: https://munchkin.marketo.net/munchkin.js cookieFound: true,true,true,false,true |
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,false,false url: https://munchkin.marketo.net/munchkin.js cookieFound: true,true,true,true |
Adobe Audience Manager
Tests whether the browser stops cookies from dpm.demdex.net from tracking users across websites. |
passed: true,true,true,true url: https://dpm.demdex.net/ibs cookieFound: 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 url: https://dpm.demdex.net/ibs cookieFound: false,false,false,false |
passed: true,true,true,true url: https://dpm.demdex.net/ibs cookieFound: 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: false,false,false,true,false url: https://dpm.demdex.net/ibs cookieFound: true,true,true,false,true |
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,false,false url: https://dpm.demdex.net/ibs cookieFound: true,true,true,true |
Amazon adsystem
Tests whether the browser stops cookies from s.amazon-adsystem.com from tracking users across websites. |
passed: true,true,true,true url: https://s.amazon-adsystem.com/dcm cookieFound: 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 url: https://s.amazon-adsystem.com/dcm cookieFound: false,false,false,false |
passed: true,true,true,true url: https://s.amazon-adsystem.com/dcm cookieFound: 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: false,false,false,true,false url: https://s.amazon-adsystem.com/dcm cookieFound: true,true,true,false,true |
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,false,false url: https://s.amazon-adsystem.com/dcm cookieFound: true,true,true,true |
AppNexus
Tests whether the browser stops cookies from ib.adnxs.com from tracking users across websites. |
passed: true,true,true,true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: 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: false,false,false,false url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true,true,true,true |
passed: true,true,true,true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: 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: false,false,false,true,false url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true,true,true,false,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,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,false,false url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true,true,true,true |
Bing Ads
Tests whether the browser stops cookies from bat.bing.com from tracking users across websites. |
passed: true,true,true,true url: https://bat.bing.com/bat.js cookieFound: false,false,false,false |
passed: false,false,false,false,false url: https://bat.bing.com/bat.js cookieFound: true,true,true,true,true |
passed: false,false,false,false url: https://bat.bing.com/bat.js cookieFound: true,true,true,true |
passed: true,true,true,true url: https://bat.bing.com/bat.js cookieFound: 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: false,false,false,true,false url: https://bat.bing.com/bat.js cookieFound: true,true,true,false,true |
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,false,false url: https://bat.bing.com/bat.js cookieFound: true,true,true,true |
Chartbeat
Tests whether the browser stops cookies from static.chartbeat.com from tracking users across websites. |
passed: true,true,true,true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: 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: false,false,false,false url: https://static.chartbeat.com/js/chartbeat.js cookieFound: true,true,true,true |
passed: true,true,true,true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: 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: false,false,false,true,false url: https://static.chartbeat.com/js/chartbeat.js cookieFound: true,true,true,false,true |
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,false,false url: https://static.chartbeat.com/js/chartbeat.js cookieFound: true,true,true,true |
Criteo
Tests whether the browser stops cookies from dis.criteo.com from tracking users across websites. |
passed: true,true,true,true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: 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 url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false,false,false,false |
passed: true,true,true,true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: 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: false,false,false,true,false url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: true,true,true,false,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 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,false,false url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: true,true,true,true |
DoubleClick (Google)
Tests whether the browser stops cookies from securepubads.g.doubleclick.net from tracking users across websites. |
passed: true,true,true,true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: 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 url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false,false,false,false |
passed: true,true,true,true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: 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: false,false,false,true,false url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: true,true,true,false,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 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,false,false url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: true,true,true,true |
Facebook tracking
Tests whether the browser stops cookies from connect.facebook.net from tracking users across websites. |
passed: true,true,true,true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: 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 url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false,false,false,false |
passed: true,true,true,true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: 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: false,false,false,true,false url: https://connect.facebook.net/en_US/fbevents.js cookieFound: true,true,true,false,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 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,false,false url: https://connect.facebook.net/en_US/fbevents.js cookieFound: true,true,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 url: https://www.google.com/pagead/1p-user-list/ cookieFound: 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 url: https://www.google.com/pagead/1p-user-list/ cookieFound: false,false,false,false |
passed: true,true,true,true url: https://www.google.com/pagead/1p-user-list/ cookieFound: 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: false,false,false,true,false url: https://www.google.com/pagead/1p-user-list/ cookieFound: true,true,true,false,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 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,false,false url: https://www.google.com/pagead/1p-user-list/ cookieFound: true,true,true,true |
Google Analytics
Tests whether the browser stops cookies from google-analytics.com from tracking users across websites. |
passed: true,true,true,true url: https://google-analytics.com/urchin.js cookieFound: false,false,false,false |
passed: false,false,false,false,false url: https://google-analytics.com/urchin.js cookieFound: true,true,true,true,true |
passed: false,false,false,false url: https://google-analytics.com/urchin.js cookieFound: true,true,true,true |
passed: true,true,true,true url: https://google-analytics.com/urchin.js cookieFound: 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: false,false,false,true,false url: https://google-analytics.com/urchin.js cookieFound: true,true,true,false,true |
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,false,false url: https://google-analytics.com/urchin.js cookieFound: true,true,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 url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: 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: false,false,false,false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true,true,true,true |
passed: true,true,true,true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: 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: false,false,false,true,false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true,true,true,false,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,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,false,false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true,true,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 url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: 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 url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false,false,false,false |
passed: 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 |
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: false,false,false,true,false url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: true,true,true,false,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 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,false,false url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: true,true,true,true |
New Relic
Tests whether the browser stops cookies from js-agent.newrelic.com from tracking users across websites. |
passed: true,true,true,true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: 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: false,false,false,false url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true,true,true,true |
passed: true,true,true,true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: 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: false,false,false,true,false url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true,true,true,false,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,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,false,false url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true,true,true,true |
Quantcast
Tests whether the browser stops cookies from pixel.quantserve.com from tracking users across websites. |
passed: true,true,true,true url: https://pixel.quantserve.com/pixel cookieFound: 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 url: https://pixel.quantserve.com/pixel cookieFound: false,false,false,false |
passed: true,true,true,true url: https://pixel.quantserve.com/pixel cookieFound: 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: false,false,false,true,false url: https://pixel.quantserve.com/pixel cookieFound: true,true,true,false,true |
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,false,false url: https://pixel.quantserve.com/pixel cookieFound: true,true,true,true |
Scorecard Research Beacon
Tests whether the browser stops cookies from sb.scorecardresearch.com from tracking users across websites. |
passed: true,true,true,true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: 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: false,false,false,false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true,true,true,true |
passed: true,true,true,true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: 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: false,false,false,true,false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true,true,true,false,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,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,false,false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true,true,true,true |
Taboola
Tests whether the browser stops cookies from trc.taboola.com from tracking users across websites. |
passed: true,true,true,true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: 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 url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false,false,false,false |
passed: true,true,true,true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: 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: false,false,false,true,false url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: true,true,true,false,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 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,false,false,false url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: true,true,true,true |
Twitter pixel
Tests whether the browser stops cookies from t.co from tracking users across websites. |
passed: true,true,true,true url: https://t.co/i/adsct cookieFound: false,false,false,false |
passed: false,false,false,false,false url: https://t.co/i/adsct cookieFound: true,true,true,true,true |
passed: false,false,false,false url: https://t.co/i/adsct cookieFound: true,true,true,true |
passed: true,true,true,true url: https://t.co/i/adsct cookieFound: 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: false,false,false,true,false url: https://t.co/i/adsct cookieFound: true,true,true,false,true |
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,false,false url: https://t.co/i/adsct cookieFound: true,true,true,true |
Yandex Ads
Tests whether the browser stops cookies from yandex.ru from tracking users across websites. |
passed: true,true,true,true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: 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 url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false,false,false,false |
passed: true,true,true,true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: 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: false,false,false,true,false url: https://yandex.ru/ads/system/header-bidding.js cookieFound: true,true,true,false,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 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: false,false,false,false url: https://yandex.ru/ads/system/header-bidding.js cookieFound: true,true,true,true |
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?) | |||||||||||
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 result, different session: h3, h3, h3, h3 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: h3, h3, h2, h3 unsupported: false, false, false, false passed: false, false, true, false test failed: 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 result, different session: h3, h3, h3, h3 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 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: 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, 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: 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 result, different session: h3, h3, h3, h3 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p result, different session: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p, e6177fbe-aa24-4cde-b396-056291211e56_1p, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p, 81b83cf7-f396-4894-948c-244a40942735_1p result, different session: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p, e6177fbe-aa24-4cde-b396-056291211e56_1p, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p, 81b83cf7-f396-4894-948c-244a40942735_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 106204b4-c822-4c4d-965c-b827fc572d5f_1p, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p, 2b52533e-2792-4328-a141-e6291fd0d163_1p, fa07c854-49de-4c41-8e37-9af2eae99850_1p result, different session: 106204b4-c822-4c4d-965c-b827fc572d5f_1p, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p, 2b52533e-2792-4328-a141-e6291fd0d163_1p, fa07c854-49de-4c41-8e37-9af2eae99850_1p unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p, c9f400b5-24e7-474f-9f14-568da2ee6788_1p, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p result, different session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p, c9f400b5-24e7-474f-9f14-568da2ee6788_1p, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6_1p, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707_1p, a0b140d3-d593-4ab9-bc87-55965bdb9968_1p, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8_1p, 82543b0c-37ca-43d1-8c56-27a410058c34_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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p, 2862e714-4ac7-46da-81a8-913895bba901_1p result, different session: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p, 2862e714-4ac7-46da-81a8-913895bba901_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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 8bb48553-d721-4780-8f78-b09777cbfc24_1p, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_1p, 218746da-3103-4db3-b751-9c93f6eff5e7_1p, eff30dad-ed29-454a-bd9f-c3e29b245b1e_1p, 0db44723-4eb1-44ef-89a1-bb062a9fab52_1p result, different session: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 1f781983-109b-431d-9f01-082c4fc81e57_1p, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_1p, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_1p, 2c6f5493-f82c-433e-9928-0a73dcce58a2_1p, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_1p result, different session: Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url'), Error: Cannot read properties of undefined (reading 'url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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 session: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p result, different session: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p unsupported: false, false, false, false passed: false, false, false, false test failed: 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p_http, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p_http, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p_http, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p_http result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p_http, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p_http, e6177fbe-aa24-4cde-b396-056291211e56_1p_http, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p_http, 81b83cf7-f396-4894-948c-244a40942735_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 106204b4-c822-4c4d-965c-b827fc572d5f_1p_http, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p_http, 2b52533e-2792-4328-a141-e6291fd0d163_1p_http, fa07c854-49de-4c41-8e37-9af2eae99850_1p_http result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: f3d4573a-3662-4541-89b9-1591d26bedf4_1p_http, c9f400b5-24e7-474f-9f14-568da2ee6788_1p_http, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p_http, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p_http result, different session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p_http, c9f400b5-24e7-474f-9f14-568da2ee6788_1p_http, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p_http, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p_http unsupported: false, false, false, false passed: false, false, false, false test failed: 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 5642effc-7665-4cb9-8b9e-7f43cda7eff6_1p_http, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707_1p_http, a0b140d3-d593-4ab9-bc87-55965bdb9968_1p_http, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8_1p_http, 82543b0c-37ca-43d1-8c56-27a410058c34_1p_http result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c_1p_http, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f_1p_http, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a_1p_http, 0bc233d6-b4ac-4c9d-9b33-864656aaede8_1p_http, 37cffb97-291e-4286-bb47-cc946ff15864_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p_http, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p_http, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p_http, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p_http, 2862e714-4ac7-46da-81a8-913895bba901_1p_http result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 8bb48553-d721-4780-8f78-b09777cbfc24_1p_http, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_1p_http, 218746da-3103-4db3-b751-9c93f6eff5e7_1p_http, eff30dad-ed29-454a-bd9f-c3e29b245b1e_1p_http, 0db44723-4eb1-44ef-89a1-bb062a9fab52_1p_http result, different session: 8bb48553-d721-4780-8f78-b09777cbfc24_1p_http, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_1p_http, 218746da-3103-4db3-b751-9c93f6eff5e7_1p_http, eff30dad-ed29-454a-bd9f-c3e29b245b1e_1p_http, 0db44723-4eb1-44ef-89a1-bb062a9fab52_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 9cbba4db-cccc-431a-91cc-2e7d4492552e_1p_http, ed46bf99-731d-43d9-87eb-a6c0c56b50a8_1p_http result, different session: , unsupported: false, false passed: true, true test failed: false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 1f781983-109b-431d-9f01-082c4fc81e57_1p_http, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_1p_http, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_1p_http, 2c6f5493-f82c-433e-9928-0a73dcce58a2_1p_http, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p_http, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p_http, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p_http, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p_http result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p_js, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p_js, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p_js, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p_js result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p_js, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p_js, e6177fbe-aa24-4cde-b396-056291211e56_1p_js, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p_js, 81b83cf7-f396-4894-948c-244a40942735_1p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 106204b4-c822-4c4d-965c-b827fc572d5f_1p_js, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p_js, 2b52533e-2792-4328-a141-e6291fd0d163_1p_js, fa07c854-49de-4c41-8e37-9af2eae99850_1p_js result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p_js, c9f400b5-24e7-474f-9f14-568da2ee6788_1p_js, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p_js, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p_js result, different session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p_js, c9f400b5-24e7-474f-9f14-568da2ee6788_1p_js, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p_js, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p_js unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 5642effc-7665-4cb9-8b9e-7f43cda7eff6_1p_js, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707_1p_js, a0b140d3-d593-4ab9-bc87-55965bdb9968_1p_js, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8_1p_js, 82543b0c-37ca-43d1-8c56-27a410058c34_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 5d608609-73f8-4ee0-bfe8-5668cbfef85c_1p_js, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f_1p_js, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a_1p_js, 0bc233d6-b4ac-4c9d-9b33-864656aaede8_1p_js, 37cffb97-291e-4286-bb47-cc946ff15864_1p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p_js, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p_js, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p_js, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p_js, 2862e714-4ac7-46da-81a8-913895bba901_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 8bb48553-d721-4780-8f78-b09777cbfc24_1p_js, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_1p_js, 218746da-3103-4db3-b751-9c93f6eff5e7_1p_js, eff30dad-ed29-454a-bd9f-c3e29b245b1e_1p_js, 0db44723-4eb1-44ef-89a1-bb062a9fab52_1p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 9cbba4db-cccc-431a-91cc-2e7d4492552e_1p_js, ed46bf99-731d-43d9-87eb-a6c0c56b50a8_1p_js result, different session: , unsupported: false, false passed: true, true test failed: false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 1f781983-109b-431d-9f01-082c4fc81e57_1p_js, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_1p_js, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_1p_js, 2c6f5493-f82c-433e-9928-0a73dcce58a2_1p_js, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_1p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p_js, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p_js, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p_js, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p_js result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p, e6177fbe-aa24-4cde-b396-056291211e56_1p, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p, 81b83cf7-f396-4894-948c-244a40942735_1p 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: 106204b4-c822-4c4d-965c-b827fc572d5f_1p, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p, 2b52533e-2792-4328-a141-e6291fd0d163_1p, fa07c854-49de-4c41-8e37-9af2eae99850_1p result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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 result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true passed: undefined test failed: 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, 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: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p, 2862e714-4ac7-46da-81a8-913895bba901_1p 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: 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: 1f781983-109b-431d-9f01-082c4fc81e57_1p, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_1p, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_1p, 2c6f5493-f82c-433e-9928-0a73dcce58a2_1p, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_1p 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: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p result, different session: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: 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_6608790817085128, fake_47225888442108666, fake_029482937773190443, fake_028537903028262646 result, different session: fake_6608790817085128, fake_47225888442108666, fake_029482937773190443, fake_028537903028262646 unsupported: false, false, false, false passed: false, false, false, false test failed: 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_38515884111998155, fake_032602519089434345, fake_09298338514654336, fake_4251212659014927, fake_4016637097560871 result, different session: fake_38515884111998155, fake_032602519089434345, fake_09298338514654336, fake_4251212659014927, fake_4016637097560871 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_1893033153657473, fake_050808074175333395, fake_5880831742330328, fake_2754336505433177 result, different session: fake_1893033153657473, fake_050808074175333395, fake_5880831742330328, fake_2754336505433177 unsupported: false, false, false, false passed: false, false, false, false test failed: 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_8508820137629389, fake_03889146580591696, fake_41841777999885155, fake_06744988456237655 result, different session: fake_8508820137629389, fake_03889146580591696, fake_41841777999885155, fake_06744988456237655 unsupported: false, false, false, false passed: false, false, false, false test failed: 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_1910735569635862, fake_18713067566337593, fake_5814079694747589, fake_25153801526256614, fake_15556577754422496 result, different session: fake_4756569342989301, fake_875052788640202, fake_05612425580109348, fake_19770841926155458, fake_27512957426473705 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_8772243008421756, fake_39377267578304376, fake_25742794441574435, fake_42537094685935983, fake_15653676798442584 result, different session: fake_27257571938273273, fake_6334808139748811, fake_8851825737606256, fake_7040041075446146, fake_24778789978059357 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_6869251901543498, fake_07951183281516272, fake_010732452382465896, fake_48358468570002766, fake_07300765530100617 result, different session: fake_6869251901543498, fake_07951183281516272, fake_010732452382465896, fake_48358468570002766, fake_07300765530100617 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_3698353761148099, fake_34119909807681115, fake_37803616367155923, fake_9992158543415945, fake_8837549387495236 result, different session: fake_3698353761148099, fake_34119909807681115, fake_37803616367155923, fake_9992158543415945, fake_8837549387495236 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_8346766756387605, fake_46217157049974844 result, different session: fake_9995495525769982, fake_15582581917234672 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_08962598829336921, fake_7409803965381221, fake_8205351881487044, fake_3619462048868365, fake_7597206597024353 result, different session: fake_08962598829336921, fake_7409803965381221, fake_8205351881487044, fake_3619462048868365, fake_7597206597024353 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_8524856474121651, fake_36893392924905055, fake_29638587759673407, fake_2861007493653862 result, different session: fake_8524856474121651, fake_36893392924905055, fake_29638587759673407, fake_2861007493653862 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 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: 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 result, different session: 2, 2, 2, 2 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 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: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 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: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 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: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 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: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p result, different session: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p unsupported: false, false, false, false passed: false, false, false, false test failed: 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: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p, e6177fbe-aa24-4cde-b396-056291211e56_1p, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p, 81b83cf7-f396-4894-948c-244a40942735_1p result, different session: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p, e6177fbe-aa24-4cde-b396-056291211e56_1p, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p, 81b83cf7-f396-4894-948c-244a40942735_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: 106204b4-c822-4c4d-965c-b827fc572d5f_1p, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p, 2b52533e-2792-4328-a141-e6291fd0d163_1p, fa07c854-49de-4c41-8e37-9af2eae99850_1p result, different session: 106204b4-c822-4c4d-965c-b827fc572d5f_1p, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p, 2b52533e-2792-4328-a141-e6291fd0d163_1p, fa07c854-49de-4c41-8e37-9af2eae99850_1p unsupported: false, false, false, false passed: false, false, false, false test failed: 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: f3d4573a-3662-4541-89b9-1591d26bedf4_1p, c9f400b5-24e7-474f-9f14-568da2ee6788_1p, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p result, different session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p, c9f400b5-24e7-474f-9f14-568da2ee6788_1p, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 5642effc-7665-4cb9-8b9e-7f43cda7eff6_1p, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707_1p, a0b140d3-d593-4ab9-bc87-55965bdb9968_1p, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8_1p, 82543b0c-37ca-43d1-8c56-27a410058c34_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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c_1p, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f_1p, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a_1p, 0bc233d6-b4ac-4c9d-9b33-864656aaede8_1p, 37cffb97-291e-4286-bb47-cc946ff15864_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: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p, 2862e714-4ac7-46da-81a8-913895bba901_1p result, different session: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p, 2862e714-4ac7-46da-81a8-913895bba901_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: 8bb48553-d721-4780-8f78-b09777cbfc24_1p, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_1p, 218746da-3103-4db3-b751-9c93f6eff5e7_1p, eff30dad-ed29-454a-bd9f-c3e29b245b1e_1p, 0db44723-4eb1-44ef-89a1-bb062a9fab52_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: 9cbba4db-cccc-431a-91cc-2e7d4492552e_1p, ed46bf99-731d-43d9-87eb-a6c0c56b50a8_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: 1f781983-109b-431d-9f01-082c4fc81e57_1p, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_1p, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_1p, 2c6f5493-f82c-433e-9928-0a73dcce58a2_1p, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_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: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p result, different session: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p unsupported: false, false, false, false passed: false, false, false, false test failed: 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: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p result, different session: 1095b4c5-c2b2-47e0-8db2-65feaa709195_1p, 67b49f9b-a50d-4abd-8700-39eae6008cac_1p, 9c5e4a2f-69aa-42ee-aff8-00cf689280f2_1p, 9969e975-3b4c-42c3-bd1f-96529e100e5d_1p unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p, e6177fbe-aa24-4cde-b396-056291211e56_1p, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p, 81b83cf7-f396-4894-948c-244a40942735_1p result, different session: c61b66b6-5f6f-4479-bbbe-d910f1c4a242_1p, 1a21bd10-857e-4b30-bd9f-e0ed001bf2be_1p, e6177fbe-aa24-4cde-b396-056291211e56_1p, 5fa493ff-7417-4537-81ca-45012dc3ad60_1p, 81b83cf7-f396-4894-948c-244a40942735_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: 106204b4-c822-4c4d-965c-b827fc572d5f_1p, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p, 2b52533e-2792-4328-a141-e6291fd0d163_1p, fa07c854-49de-4c41-8e37-9af2eae99850_1p result, different session: 106204b4-c822-4c4d-965c-b827fc572d5f_1p, 62518c05-fa03-4cde-8884-8abc7354cb5c_1p, 2b52533e-2792-4328-a141-e6291fd0d163_1p, fa07c854-49de-4c41-8e37-9af2eae99850_1p unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p, c9f400b5-24e7-474f-9f14-568da2ee6788_1p, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p result, different session: f3d4573a-3662-4541-89b9-1591d26bedf4_1p, c9f400b5-24e7-474f-9f14-568da2ee6788_1p, 7d503cdb-7b08-471f-980e-7c8d56d05239_1p, 7d335416-6a49-4da5-8a6d-eb655fa2d0fb_1p unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 5642effc-7665-4cb9-8b9e-7f43cda7eff6_1p, 2d3fe1ab-5fb0-419f-890f-c34b13e6a707_1p, a0b140d3-d593-4ab9-bc87-55965bdb9968_1p, 9a9d5b43-dea0-496c-89e0-75cdaa2d72e8_1p, 82543b0c-37ca-43d1-8c56-27a410058c34_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: 5d608609-73f8-4ee0-bfe8-5668cbfef85c_1p, b4ed6530-6b24-4f84-8f0d-2f23148b2c6f_1p, 85d6aa10-b22b-47ed-9997-9bb68ad7a26a_1p, 0bc233d6-b4ac-4c9d-9b33-864656aaede8_1p, 37cffb97-291e-4286-bb47-cc946ff15864_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: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p, 2862e714-4ac7-46da-81a8-913895bba901_1p result, different session: 1ac417a7-e448-45f0-9603-c61ec3f8b345_1p, 7bfdf1f8-23dc-4f87-bdb5-f7ad604c893c_1p, 36eb090a-c192-453b-9587-4ac47e0fb44e_1p, ca982fd0-e8ff-445d-a15c-e8ac1d6cb067_1p, 2862e714-4ac7-46da-81a8-913895bba901_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: 8bb48553-d721-4780-8f78-b09777cbfc24_1p, 33ad92d6-6dee-4ba3-9039-1cbfd8e54b3f_1p, 218746da-3103-4db3-b751-9c93f6eff5e7_1p, eff30dad-ed29-454a-bd9f-c3e29b245b1e_1p, 0db44723-4eb1-44ef-89a1-bb062a9fab52_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: 9cbba4db-cccc-431a-91cc-2e7d4492552e_1p, ed46bf99-731d-43d9-87eb-a6c0c56b50a8_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: 1f781983-109b-431d-9f01-082c4fc81e57_1p, 9c56c899-d156-4e5a-8e2e-d0e44f4f33d9_1p, 0c5f7117-5e93-4b7f-b49b-d254238fd3a0_1p, 2c6f5493-f82c-433e-9928-0a73dcce58a2_1p, 98bf4063-d303-475d-b01d-3e4dbb2dcbe7_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: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p result, different session: fea73457-ab1a-4106-b0ae-dbd12477cff0_1p, 7e4d381d-c79a-49fd-a6b3-4bcb60ba4778_1p, 25e332ba-d729-4f3f-a43b-ace2be2221da_1p, 636949e8-d7aa-4d97-a66c-e3089de2d3c7_1p unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: 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, 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 result, different session: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
Web SQL Database
The Web SQL Database is a deprecated web API for storing data in an SQL database. |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same session: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different session: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true passed: undefined test failed: false, false, false, false |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same session: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different session: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same session: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different session: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true passed: undefined test failed: false, false, false, false |
write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same session: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function res |