(default settings)
|
brave 1.61 |
chrome 120.0 |
duckduckgo 5.182 |
edge 119.0 |
firefox 120.1 |
focus 120.1 |
mull 120.0 |
opera 79.2 |
samsung 23.0 |
tor 115.2 |
vivaldi 6.4 |
yandex 23.11 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
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, 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: 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 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: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 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. 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: undefined test failed: true, true, true, true, true |
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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 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. 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: undefined test failed: true, true, true, true, true |
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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: undefined test failed: true, true, true, true, true |
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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: a7ea552a-255c-404e-9e7f-e21c9c2a15eb, a7ea552a-255c-404e-9e7f-e21c9c2a15eb, a7ea552a-255c-404e-9e7f-e21c9c2a15eb, a7ea552a-255c-404e-9e7f-e21c9c2a15eb, a7ea552a-255c-404e-9e7f-e21c9c2a15eb result, different first party: Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: eeb6640d-2f2b-44c7-a17e-361524b4f144, eeb6640d-2f2b-44c7-a17e-361524b4f144, eeb6640d-2f2b-44c7-a17e-361524b4f144, eeb6640d-2f2b-44c7-a17e-361524b4f144, eeb6640d-2f2b-44c7-a17e-361524b4f144 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977 result, different first party: 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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 first party: 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866 result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 4dbc3271-e290-42ad-a46c-7d5543158033, 4dbc3271-e290-42ad-a46c-7d5543158033, 4dbc3271-e290-42ad-a46c-7d5543158033, 4dbc3271-e290-42ad-a46c-7d5543158033, 4dbc3271-e290-42ad-a46c-7d5543158033 result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: b9b246ab-6e78-4d8d-839f-01008346b9a8, b9b246ab-6e78-4d8d-839f-01008346b9a8, b9b246ab-6e78-4d8d-839f-01008346b9a8, b9b246ab-6e78-4d8d-839f-01008346b9a8, b9b246ab-6e78-4d8d-839f-01008346b9a8 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b result, different first party: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e result, different first party: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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 first party: cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97 result, different first party: cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. | write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 6b08516b-6570-43f7-b0be-994b64b83297_http, b3c0b764-1694-4606-a574-bd20bae88ebf_http, ff11ee75-0297-4921-b084-a1e50d015a81_http, c074b37f-8845-4ae6-9597-d35653e4a1e8_http, 0cd9bc56-c223-47da-845d-d89863e25b5d_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_http, 5c932743-4914-4bfb-990e-7fec30b37d17_http, 7efb1829-a14a-4059-8f2f-c87a70d20550_http, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_http, 6453fa6c-736b-4330-ae61-ffc98e5e7651_http result, different first party: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_http, 5c932743-4914-4bfb-990e-7fec30b37d17_http, 7efb1829-a14a-4059-8f2f-c87a70d20550_http, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_http, 6453fa6c-736b-4330-ae61-ffc98e5e7651_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5_http, cec297a4-ab57-4f4a-864a-2f344d81840e_http, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_http, ff65e9e0-3d17-43b5-9466-be17af1bf92f_http, 5b66b722-17d1-4891-8c1e-6d87801b5724_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_http, fd84492e-9bb6-4592-a4a4-4accee642151_http, 68d1c313-6142-4ae8-8afb-c80456336653_http, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_http, 1e427c1b-05a9-40da-86da-06b5fef221da_http result, different first party: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_http, fd84492e-9bb6-4592-a4a4-4accee642151_http, 68d1c313-6142-4ae8-8afb-c80456336653_http, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_http, 1e427c1b-05a9-40da-86da-06b5fef221da_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 58eb4d3d-e93b-456e-9c42-82926a183c7d_http, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_http, 2617895e-ca04-4e76-8572-796ec6927c9f_http, be826c7c-356f-4728-b142-2e67dd425871_http, 61d2f896-fb76-46dd-8c68-3714cd861529_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_http, ececa7a9-a219-4808-96e4-424d475ecf77_http, 6a304f98-28fe-48e7-bc81-784524f46f56_http, ad602811-662e-4bf0-bc96-e3a5c692ef27_http, 17905561-5d43-44b4-92a7-423f801f946e_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: d051c148-5407-4bdd-a077-bfb85da31a5f_http, 5a5967a4-93ce-4679-830c-9e3da8a911ab_http, 3802560d-d657-4e32-b3f0-d141cbdcba07_http, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_http, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 198a735f-2eb7-463e-9237-b167ea6b2faf_http, 0e2b28dc-69b6-426b-a79b-61463663b77f_http, 524e1c43-d711-4742-a9a9-6293371f056c_http, 057d3099-61b6-4071-b01c-626cfaa410b2_http, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_http result, different first party: 198a735f-2eb7-463e-9237-b167ea6b2faf_http, 0e2b28dc-69b6-426b-a79b-61463663b77f_http, 524e1c43-d711-4742-a9a9-6293371f056c_http, 057d3099-61b6-4071-b01c-626cfaa410b2_http, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_http, e1222404-2fee-4a7a-b129-265717ea5eda_http, dba1531c-5070-42a1-8651-2b0448f009ae_http, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_http, 3baae986-6067-4f50-8b6a-e9bc394c9e25_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: da3cc1bf-a4fe-4deb-b990-118151fb0d94_http, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0_http, 712350c9-127f-492f-891b-ad59788b27b3_http, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e_http, e5aa0e20-a99a-401a-88d7-439f2901087b_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: c5688c7d-69b9-4a18-8428-34ead9f41327_http, cb767888-0acd-451c-87bd-5d62ab751366_http, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_http, 24953eaf-775a-47aa-ad45-e7d185f9b75d_http, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_http result, different first party: c5688c7d-69b9-4a18-8428-34ead9f41327_http, cb767888-0acd-451c-87bd-5d62ab751366_http, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_http, 24953eaf-775a-47aa-ad45-e7d185f9b75d_http, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_http, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_http, 00fbc641-ac94-4300-b590-f958045ad3f9_http, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_http, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_http result, different first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_http, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_http, 00fbc641-ac94-4300-b590-f958045ad3f9_http, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_http, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. | write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 6b08516b-6570-43f7-b0be-994b64b83297_js, b3c0b764-1694-4606-a574-bd20bae88ebf_js, ff11ee75-0297-4921-b084-a1e50d015a81_js, c074b37f-8845-4ae6-9597-d35653e4a1e8_js, 0cd9bc56-c223-47da-845d-d89863e25b5d_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_js, 5c932743-4914-4bfb-990e-7fec30b37d17_js, 7efb1829-a14a-4059-8f2f-c87a70d20550_js, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_js, 6453fa6c-736b-4330-ae61-ffc98e5e7651_js result, different first party: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_js, 5c932743-4914-4bfb-990e-7fec30b37d17_js, 7efb1829-a14a-4059-8f2f-c87a70d20550_js, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_js, 6453fa6c-736b-4330-ae61-ffc98e5e7651_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5_js, cec297a4-ab57-4f4a-864a-2f344d81840e_js, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_js, ff65e9e0-3d17-43b5-9466-be17af1bf92f_js, 5b66b722-17d1-4891-8c1e-6d87801b5724_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_js, fd84492e-9bb6-4592-a4a4-4accee642151_js, 68d1c313-6142-4ae8-8afb-c80456336653_js, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_js, 1e427c1b-05a9-40da-86da-06b5fef221da_js result, different first party: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_js, fd84492e-9bb6-4592-a4a4-4accee642151_js, 68d1c313-6142-4ae8-8afb-c80456336653_js, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_js, 1e427c1b-05a9-40da-86da-06b5fef221da_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 58eb4d3d-e93b-456e-9c42-82926a183c7d_js, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_js, 2617895e-ca04-4e76-8572-796ec6927c9f_js, be826c7c-356f-4728-b142-2e67dd425871_js, 61d2f896-fb76-46dd-8c68-3714cd861529_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_js, ececa7a9-a219-4808-96e4-424d475ecf77_js, 6a304f98-28fe-48e7-bc81-784524f46f56_js, ad602811-662e-4bf0-bc96-e3a5c692ef27_js, 17905561-5d43-44b4-92a7-423f801f946e_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: d051c148-5407-4bdd-a077-bfb85da31a5f_js, 5a5967a4-93ce-4679-830c-9e3da8a911ab_js, 3802560d-d657-4e32-b3f0-d141cbdcba07_js, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_js, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 198a735f-2eb7-463e-9237-b167ea6b2faf_js, 0e2b28dc-69b6-426b-a79b-61463663b77f_js, 524e1c43-d711-4742-a9a9-6293371f056c_js, 057d3099-61b6-4071-b01c-626cfaa410b2_js, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_js result, different first party: 198a735f-2eb7-463e-9237-b167ea6b2faf_js, 0e2b28dc-69b6-426b-a79b-61463663b77f_js, 524e1c43-d711-4742-a9a9-6293371f056c_js, 057d3099-61b6-4071-b01c-626cfaa410b2_js, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_js, e1222404-2fee-4a7a-b129-265717ea5eda_js, dba1531c-5070-42a1-8651-2b0448f009ae_js, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_js, 3baae986-6067-4f50-8b6a-e9bc394c9e25_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: da3cc1bf-a4fe-4deb-b990-118151fb0d94_js, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0_js, 712350c9-127f-492f-891b-ad59788b27b3_js, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e_js, e5aa0e20-a99a-401a-88d7-439f2901087b_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: c5688c7d-69b9-4a18-8428-34ead9f41327_js, cb767888-0acd-451c-87bd-5d62ab751366_js, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_js, 24953eaf-775a-47aa-ad45-e7d185f9b75d_js, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_js result, different first party: c5688c7d-69b9-4a18-8428-34ead9f41327_js, cb767888-0acd-451c-87bd-5d62ab751366_js, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_js, 24953eaf-775a-47aa-ad45-e7d185f9b75d_js, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_js, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_js, 00fbc641-ac94-4300-b590-f958045ad3f9_js, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_js, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_js result, different first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_js, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_js, 00fbc641-ac94-4300-b590-f958045ad3f9_js, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_js, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. | write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 6b08516b-6570-43f7-b0be-994b64b83297, b3c0b764-1694-4606-a574-bd20bae88ebf, ff11ee75-0297-4921-b084-a1e50d015a81, c074b37f-8845-4ae6-9597-d35653e4a1e8, 0cd9bc56-c223-47da-845d-d89863e25b5d 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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 result, different first party: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 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: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da result, different first party: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da 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, 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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 result, different first party: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 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: 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: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d 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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. | write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_5275074208974333, fake_05979543493140271, fake_434517643539289, fake_6731977138627823, fake_04852488446791581 result, different first party: fake_6452711120923325, fake_4396445403759448, fake_12124042490479914, fake_3590680265202304, fake_8155726667126821 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_7044859506470782, fake_1380069503411414, fake_05629113151250831, fake_6731445997480836, fake_3339519554429291 result, different first party: fake_933557968177642, fake_7842226721472922, fake_20342606645804695, fake_20078636003437755, fake_8411976136787294 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_37520916051401554, fake_11824585095884554, fake_16119250691936515, fake_6389862369009303, fake_9703708434809974 result, different first party: fake_37520916051401554, fake_11824585095884554, fake_16119250691936515, fake_6389862369009303, fake_9703708434809974 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 first party: fake_5678731979487, fake_41791840998059326, fake_4165871147173954, fake_16382039524207515, fake_6182364629911672 result, different first party: fake_9690372302262784, fake_014698821673197138, fake_6389003722900575, fake_22282754622867418, fake_4844434857196942 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_5947881819371386, fake_7249144634086202, fake_9634482086286171, fake_45878750327838813, fake_44711050966728116 result, different first party: fake_7212369411166488, fake_9737600888464433, fake_4960780309811057, fake_11490061864366408, fake_2432402411155299 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_5538973239993565, fake_5240710664529844, fake_8855053084517013, fake_39104324343562635, fake_05940884903794963 result, different first party: fake_2705896906498346, fake_33063591909012313, fake_5884268664623606, fake_2414774002601383, fake_45376262623774943 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_6232586271527893, fake_11277920094390614, fake_06260974558054211, fake_5784001167366468, fake_5682543417662933 result, different first party: fake_905962882385466, fake_3260231938231217, fake_9051793138692128, fake_4932252582021197, fake_7773748480048188 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_17818191258643523, fake_49616738808303595, fake_7399929567636032, fake_8079714584904831, fake_026186801912995383 result, different first party: fake_8914099994212543, fake_3643890220374122, fake_05379838392099234, fake_1591117520449319, fake_5455529942809334 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_11874825000075839, fake_5753770696117535, fake_6784834142455312, fake_3022647656193467, fake_31221894049077137 result, different first party: fake_11874825000075839, fake_5753770696117535, fake_6784834142455312, fake_3022647656193467, fake_31221894049077137 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 first party: fake_3065810672208864, fake_009233202542390906, fake_6545411278203017, fake_7119801249397877, fake_3998581636273282 result, different first party: fake_6873404481285086, fake_5799515061757028, fake_6734938748836043, fake_940869269553728, fake_3589380580738506 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_779055418950686, fake_28365779406921376, fake_640042542394285, fake_699950455810582, fake_8071322724111052 result, different first party: fake_779055418950686, fake_28365779406921376, fake_640042542394285, fake_699950455810582, fake_8071322724111052 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 first party: fake_11869376552418687, fake_34758313516762995, fake_254574069563823, fake_2547308828364363, fake_5413116268590601 result, different first party: fake_11869376552418687, fake_34758313516762995, fake_254574069563823, fake_2547308828364363, fake_5413116268590601 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
favicon cache
A favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites. | write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 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: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 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: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
fetch cache
When a resource is received via the Fetch API, it is frequently cached. That cache can potentially be abused for cross-site tracking. | write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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 first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 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 |
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. | write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: 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: 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: 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 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: 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 first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
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: 6b08516b-6570-43f7-b0be-994b64b83297, b3c0b764-1694-4606-a574-bd20bae88ebf, ff11ee75-0297-4921-b084-a1e50d015a81, c074b37f-8845-4ae6-9597-d35653e4a1e8, 0cd9bc56-c223-47da-845d-d89863e25b5d 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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 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: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 result, different first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 unsupported: false, false, false, false, false passed: false, false, false, false, false 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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da 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: 58eb4d3d-e93b-456e-9c42-82926a183c7d, 08c014e5-66fb-469d-826a-9a7c0cc5dce4, 2617895e-ca04-4e76-8572-796ec6927c9f, be826c7c-356f-4728-b142-2e67dd425871, 61d2f896-fb76-46dd-8c68-3714cd861529 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: d051c148-5407-4bdd-a077-bfb85da31a5f, 5a5967a4-93ce-4679-830c-9e3da8a911ab, 3802560d-d657-4e32-b3f0-d141cbdcba07, d3ee86db-9b46-4e5b-8888-959dbb9b13a6, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a 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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 result, different first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 unsupported: false, false, false, false, false passed: false, false, false, false, false 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: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d unsupported: false, false, false, false, false passed: false, false, false, false, false 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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
H1 connection
HTTP/1.x are the classic web connection protocols. If these connections are re-used across websites, they can be used to track users. | write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 6b08516b-6570-43f7-b0be-994b64b83297, b3c0b764-1694-4606-a574-bd20bae88ebf, ff11ee75-0297-4921-b084-a1e50d015a81, c074b37f-8845-4ae6-9597-d35653e4a1e8, 0cd9bc56-c223-47da-845d-d89863e25b5d result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 result, different first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 58eb4d3d-e93b-456e-9c42-82926a183c7d, 08c014e5-66fb-469d-826a-9a7c0cc5dce4, 2617895e-ca04-4e76-8572-796ec6927c9f, be826c7c-356f-4728-b142-2e67dd425871, 61d2f896-fb76-46dd-8c68-3714cd861529 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4, ececa7a9-a219-4808-96e4-424d475ecf77, 6a304f98-28fe-48e7-bc81-784524f46f56, ad602811-662e-4bf0-bc96-e3a5c692ef27, 17905561-5d43-44b4-92a7-423f801f946e 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d051c148-5407-4bdd-a077-bfb85da31a5f, 5a5967a4-93ce-4679-830c-9e3da8a911ab, 3802560d-d657-4e32-b3f0-d141cbdcba07, d3ee86db-9b46-4e5b-8888-959dbb9b13a6, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 result, different first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: da3cc1bf-a4fe-4deb-b990-118151fb0d94, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0, 712350c9-127f-492f-891b-ad59788b27b3, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e, e5aa0e20-a99a-401a-88d7-439f2901087b 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
H2 connection
HTTP/2 is a web connection protocol introduced in 2015. Some browsers re-use HTTP/2 connections across websites and can thus be used to track users. | write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 6b08516b-6570-43f7-b0be-994b64b83297, b3c0b764-1694-4606-a574-bd20bae88ebf, ff11ee75-0297-4921-b084-a1e50d015a81, c074b37f-8845-4ae6-9597-d35653e4a1e8, 0cd9bc56-c223-47da-845d-d89863e25b5d result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 result, different first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 58eb4d3d-e93b-456e-9c42-82926a183c7d, 08c014e5-66fb-469d-826a-9a7c0cc5dce4, 2617895e-ca04-4e76-8572-796ec6927c9f, be826c7c-356f-4728-b142-2e67dd425871, 61d2f896-fb76-46dd-8c68-3714cd861529 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4, ececa7a9-a219-4808-96e4-424d475ecf77, 6a304f98-28fe-48e7-bc81-784524f46f56, ad602811-662e-4bf0-bc96-e3a5c692ef27, 17905561-5d43-44b4-92a7-423f801f946e 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d051c148-5407-4bdd-a077-bfb85da31a5f, 5a5967a4-93ce-4679-830c-9e3da8a911ab, 3802560d-d657-4e32-b3f0-d141cbdcba07, d3ee86db-9b46-4e5b-8888-959dbb9b13a6, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 result, different first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: da3cc1bf-a4fe-4deb-b990-118151fb0d94, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0, 712350c9-127f-492f-891b-ad59788b27b3, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e, e5aa0e20-a99a-401a-88d7-439f2901087b 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
H3 connection
HTTP/3 is a new standard HTTP connection protocol, still in draft but widely supported by browsers. If it is not partitioned, it can be used to track users across websites. | write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 53ca3ebfbd9c5928aafd9fb16deb9359, f45e5bf2800ac25cbc8199cc33b42c81, 1cc6405ce05b6ecfa65296455c70484c, 4b0a928f6fa85a4eb07a871b27627ae9, 551c836925c771d8a6ad660ef6eccc7f result, different first party: e061a8ff99970e043daaa66da94bed8c, e97b92f74db7e1292445e0ff1cb76668, 9a0773a29d2ddfda405cc3b3a0e80cc3, 8a0157469a144740710b4cee24c35a26, 713bc6728870a36122bf84ca9f8e2f24 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: c76f246007f4caf4c4a9453a6fc849b1, 07e5413ea302f4339229b1b62b4ac45f, ce97eff9fcaca5b928670bee57607337, 9c1434dbc52781904cbe7f74ed115cf5, 0768bdaa9e7ef14c7d3eb582435843a4 result, different first party: 4a0c6eb96f6c87c443a6d06f0de74f63, 53ed7f1c518629fd76ff44ae5710dc12, 7e27b0ba589248455754a38b9106b30d, d5dea4bf2e337c053cfac12994aa0212, 1c035853c962e835873ebc99b3d62bb9 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: 93ab52dec107c62a63027f18c5586a8a, cf3e38c25b6e2a0269d64c9e1475b0f9, f7cda2c7ab54cbfe6cbd0fcdcd523d3b, 332c85f4788ddbd7240d9efc89b2e7ca, 72384286e3cf89facde7634464d682f6 result, different first party: 93ab52dec107c62a63027f18c5586a8a, cf3e38c25b6e2a0269d64c9e1475b0f9, f7cda2c7ab54cbfe6cbd0fcdcd523d3b, 332c85f4788ddbd7240d9efc89b2e7ca, 72384286e3cf89facde7634464d682f6 unsupported: false, false, false, false, false passed: false, false, false, false, false 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: f84b1f49641929c06506b77b784fb819, e5524b1ebf7aa860ab0bd8180285fd0d, 1d3cbc6125f67390b2a3de84333ddace, a882b202c054482caf658ef1fcd64178, 340356dbc949145cfd7fd206d36dfd05 result, different first party: c0089a3aef7f963d82c8ca129cf90028, be5f60ae69bc5ebb1abd26f7911542ee, 4b69b85295484251d6be27d987e07e07, 99c31630eff34adef2194703af6fc410, f2488ecc5541095adeafbd7b0a1d1a3a 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: 16d93bbe03ab2cce18d4bb589216e7b3, 0c516aba027149a26a2293e024f61b0a, 6346412b33085878b08aca41e8385b57, 3e469787f28f6de3b7e0e49512fa8367, 85fe9cbf5564f4813afdd4dca225aa00 result, different first party: a6c52e2a289c12b82a302d904732e3aa, fa33bcaec1c0b635ae6e896e45ceef60, 226588c5db9de7aaee4af282aca24a02, 37e781f9eac89f65a89bc15ac0f07fd4, f13d1a8baea97301adab8dbf518f4ed6 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: 52c0cd0375ca7360139932b43621f1d0, 21dcd405495fbbcc9b634c4fbef94e44, 9c450d1665d3c27cae78b2edcfd4a1a2, 2542a445ea73625f41cd45f32e433746, a85436039d86084ed29d22c2791e6e26 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: cfc5f90e4f64d9a899f12c0328890d38, 82348a8e163bb108457b934d270cd1c7, 04645e738f4754f921a59e9131e29016, 60de80c254d1ed6d4be3dd53a0060edb, c4d3b5f8345365bbe61f8f709d953159 result, different first party: 9a46f5ec1be0ccfcebe129c9f6ccf012, 215c7c264e43fd60847b46ea3fb8534e, e286616c48e8fffec7c1197af451ae96, 5e77e2b2eb55b9ef96c26f0f4fabd596, 1de82043c0a8be55b8de252a79f123da 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: 339e9d1a6a573f4694d5c22dc304f0d6, 8cc72592512ae8647700c979f4a5d5f4, 6fa7871224ec4b58e270b4c0403fc25a, 1a73e1fc647b62b1166f9f25e886d584, 2e2d8a1d2c2c2989c98a05665d538364 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: c80abec33432530c80de079c3cc477cc, be3d327e4cfc415bbd0b0dc9def429ad, 3e0e3ed797ec7d2e3cf9bc4bbd53a6ae, e9465ea59643d7cae9638671a0f704ee, ed1c26f453e725c7f9251f1a87a99283 result, different first party: d2f6b7a5cfa1974b6dea32600cd04be7, 3d6b2851720d92c8f57a23b4930d2e69, 6c2362a3a873048108d64ed2d0fec627, c8c89bb537ad0e1d61a10216071eafc5, cf8927d14d545ac2620f3f3b80df6007 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: 6817d807495321b50e630d75c5db7d5c, 9544c3a7e2396f5a35cc80e6f3da0fe0, 51792c80afc2aa915c0128258b12b779, 055489ce0d38a8a41634bbe57d609bea, aa25509a153324fd047c761e563b0ce0 result, different first party: 2feee73f7403055fb50a6805ae840403, e8cb0e90697e97c90d16128b09539a99, d982a9173b89e0ae6a1a256ba557e5ad, 96113fb1b5b2a08767887ed959f43a48, b30010a30e983da5b1661cf7e502a225 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
HSTS cache
The HTTP Strict-Transport-Security response header allows a website to signal that it should only be accessed via HTTPS. The browser remembers this directive in a database, but if this database is not partitioned, then it can be used to track users across websites." | write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: 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: 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, 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, 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 |
HSTS cache (fetch)
The HTTP Strict-Transport-Security response header allows a website to signal that it should only be accessed via HTTPS. The browser remembers this directive in a database, but if this database is not partitioned, then it can be used to track users across websites." | write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: 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: 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, 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, 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 |
iframe cache
An iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking. | write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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 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: 2, 1, 1, 1, 1 result, different first party: 3, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
image cache
Caching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. | write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => 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: 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: 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 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: 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 first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
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: 6b08516b-6570-43f7-b0be-994b64b83297, b3c0b764-1694-4606-a574-bd20bae88ebf, ff11ee75-0297-4921-b084-a1e50d015a81, c074b37f-8845-4ae6-9597-d35653e4a1e8, 0cd9bc56-c223-47da-845d-d89863e25b5d 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., Error: The user denied permission to access the database. 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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 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: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 result, different first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 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 first party: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da 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: 58eb4d3d-e93b-456e-9c42-82926a183c7d, 08c014e5-66fb-469d-826a-9a7c0cc5dce4, 2617895e-ca04-4e76-8572-796ec6927c9f, be826c7c-356f-4728-b142-2e67dd425871, 61d2f896-fb76-46dd-8c68-3714cd861529 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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4, ececa7a9-a219-4808-96e4-424d475ecf77, 6a304f98-28fe-48e7-bc81-784524f46f56, ad602811-662e-4bf0-bc96-e3a5c692ef27, 17905561-5d43-44b4-92a7-423f801f946e 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: d051c148-5407-4bdd-a077-bfb85da31a5f, 5a5967a4-93ce-4679-830c-9e3da8a911ab, 3802560d-d657-4e32-b3f0-d141cbdcba07, d3ee86db-9b46-4e5b-8888-959dbb9b13a6, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a 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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 result, different first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 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 first party: da3cc1bf-a4fe-4deb-b990-118151fb0d94, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0, 712350c9-127f-492f-891b-ad59788b27b3, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e, e5aa0e20-a99a-401a-88d7-439f2901087b 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: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d 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 first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
localStorage
The localStorage API gives websites access to a key-value database that will remain available across visits. If the localStorage API is not partitioned or blocked, it can also be used to track users across websites. | write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 6b08516b-6570-43f7-b0be-994b64b83297, b3c0b764-1694-4606-a574-bd20bae88ebf, ff11ee75-0297-4921-b084-a1e50d015a81, c074b37f-8845-4ae6-9597-d35653e4a1e8, 0cd9bc56-c223-47da-845d-d89863e25b5d 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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 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: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 result, different first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 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 first party: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da 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: 58eb4d3d-e93b-456e-9c42-82926a183c7d, 08c014e5-66fb-469d-826a-9a7c0cc5dce4, 2617895e-ca04-4e76-8572-796ec6927c9f, be826c7c-356f-4728-b142-2e67dd425871, 61d2f896-fb76-46dd-8c68-3714cd861529 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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4, ececa7a9-a219-4808-96e4-424d475ecf77, 6a304f98-28fe-48e7-bc81-784524f46f56, ad602811-662e-4bf0-bc96-e3a5c692ef27, 17905561-5d43-44b4-92a7-423f801f946e 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: d051c148-5407-4bdd-a077-bfb85da31a5f, 5a5967a4-93ce-4679-830c-9e3da8a911ab, 3802560d-d657-4e32-b3f0-d141cbdcba07, d3ee86db-9b46-4e5b-8888-959dbb9b13a6, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a 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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 result, different first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 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 first party: da3cc1bf-a4fe-4deb-b990-118151fb0d94, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0, 712350c9-127f-492f-891b-ad59788b27b3, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e, e5aa0e20-a99a-401a-88d7-439f2901087b 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: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d 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 first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
locks
navigator.locks (only supported in some browsers) allows scripts on multiple tabs to coordinate. If this API is not partitioned, it can be used for cross-site tracking. | write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 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') result, different first party: Error: The request was denied., 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, false passed: undefined test failed: true, true, true, true, true |
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: 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') 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: undefined test failed: true, true, true, true, true |
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: 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') 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: undefined test failed: true, true, true, true, true |
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: 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') 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: undefined test failed: true, true, true, true, true |
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: Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined 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: undefined test failed: true, true, true, true, true |
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: Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined 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: undefined test failed: true, true, true, true, true |
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: Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined result, different first party: Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
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: 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') 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: undefined test failed: true, true, true, true, true |
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: 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') 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: undefined test failed: true, true, true, true, true |
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: Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined, Error: queryResult.held[0] is undefined 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: undefined test failed: true, true, true, true, true |
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: 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') 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: undefined test failed: true, true, true, true, true |
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: 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') 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: undefined test failed: true, true, true, true, true |
prefetch cache
A <link rel='prefetch'...> suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites. | write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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 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: 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 first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
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: , , , , 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., 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, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true |
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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined 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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined 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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined 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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined 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: 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 { 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: 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 { 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: 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 { 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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined 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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined 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: Error: no SharedWorker message received, Error: no SharedWorker message received, Error: no SharedWorker message received, Error: no SharedWorker message received, Error: no SharedWorker message received 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: undefined test failed: true, true, true, true, true |
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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined 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: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
TLS Session ID
The TLS protocol is used by HTTPS to make connections secure. If the browser were to re-use a TLS session, then the session ID could be used to track users across websites. | write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: cd886f666fa96c06fb56c52e519b194ddf07012964f4967ebace9887c0a95e99, 807fa0edcbf3cc4c674b2b980e106d12aa8bc4f4e4397b11613730ccc58bb537, b2b4e8dde693aa6a26754815edbb4484b8a764580c7e557853cad78119894e69, 117bc2f93c0501f6a298b356cbab0d727e382cc9908d8b6658433655ad7229f3, f90a8fea30c1f78f7778c202f9376a284905caba7dc294bdc9cc0012a8f58ca6 result, different first party: 6f16e96312182040f6de88102a8f571e9bfedc883c466f474d38a28cb4ef5ce7, 1d1fb26276d1291280c50ae84e2fe341e71190f50578d61861f267daa1d36e9f, 24f41eab94924820f353930dd630c86f5fe7f63af2b729b58452705cf7236b18, 61f61140ae9cc93ff07d41f27ba6fbe276fa850cd05bf81a8a73f8c3d8390414, 38273748259f62e1c90433ac92a4e9fe91e44a8eaa4bc48aab08475ba1401b47 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: ad8958d9bc881641f5893a97eec71fbbf1c7242cb56b27159c6e2d274d7cf55d, 7693a4e0c60bff802e6b208d4806faecfb4cdd753950d3000d17046ba8986797, 94dfeb487f72c1459cb9f4b1057685b267e1464e027509bbe1cfc97c9ba60fde, 8b2caba019ab32a9e4ab53663132c03cc85e5c570943883024feb97df2aa14c0, b47109f0bc3bec67d8fed46953812b73b324b8279f7a11f5df5a926193eb2ecb result, different first party: f3cf6ad9a18c80f71178293bfa9754ce014cf841f92bb4341ebec66836b9c09b, beccf18e0d9a99d14a312bdf4fdfef111d8af313ff4b93ff91a6fffd18e14e11, 46e4e940a5a632a6c4d57f4d203ef6c2d37a070d9bf2cb413c53b8b131fb2370, 6a4c2d09a1805976a9d25a859da697ab7b9c131177f49a22d35b08ff60ba7833, 564946040b22ecb4b920536e648eb1ca44f48f983cfd60780191f6fee042eafb 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: c225106422f37e7d29331ebe5d5bbb752f8b28526f6e3b0cb48e851508b9386e, 94d29e5734a09e1504deced4a75dbfb36e87949383c390cf40b4d53633cfb7cc, ed443ab635e1e4ce0b32c1c2dbacc9b7f97bf438e6f632d9655572ce844a93af, 996d0f4b467c07dede59e7c849e2a36997cae11d7d6e3e7b8f636cb8d65e16c4, 85488469b701477c7a655995ff5e9968e87d2ded30a47c96e63ec4f54be1a1c9 result, different first party: c61203589c694c6e2f533b734c4734452764a099d4ff70c3d3972c8ecd0e3822, 9b8d64a714002990cb187ade8c72646957a80e784e0e3df2d89072d373082f32, c9db0eb574a3fa3962d9d5da135fe2a25fe63b900070cd67eda2d2e9e0495d2a, 37d89ae83314a05216619c1c77dea78501d0d7a9334c6d3b4142f18f05d973d2, 076934445350bebb8c25400943343564c081d629f8f6f374fc29fb4ed4dda794 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: ea35c218e8a09c6fb54d3174dd2218388090d56596dcaf55818daa47cfc6e015, 67797eb3b5a0abab4e0b21bc4f05ea7003ba7cbb9c90ce28bf839789543f613f, 0b8509f4348c503d60c67424196e80a540bc9b54f9d40fbbef2e4b794c9793a0, 66b0162b16244bde61164a0aaff764fa4d48d40d3e74dfe477c54b301d3c159d, d97d83c94d015b76e582c86baf0892ab96cc9a3fccf626e8d340cba175e99e41 result, different first party: dafb4f71684bf16e2dfcf14b0a61a673e666aa3372d3d10303902b1d3496d54b, 4d4b0f838b0758f143bd2744f3f41fa52d777719ef8002d08c5b2afc79f2b9ac, eee5992ef17028005c1d2984344ad376ac1295eac01971adf32961292d62243d, 5480de37374d1f9df2f635e0393ddf5fa8d940edc2319d471cdb59662fe2b43b, b4ea2c5dfc65d34b1b45b53724c1b5b5c542d299262e87d13e0783806c47d8a2 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: 5bac22780c838bd6343247a2eceef0a8213ad26e62dc793687d76ed7257f438b, fc8211d4f1d35f244eb6b2a24b6405e7c9e8f3946a36c10d176e762c11e478cb, 6da01565e47c3d9b640b7d7411276337e847d894d22925ae1faefc4ebdf4730e, e2f44e3a9f2e25990d6f75c0fca1e9edf23e0d7d89fe813809b98604d164c3e7, d62c07fd25dba0fdc87c530cf2bfdbb4e04860964990d1557c13947ef7433fbf result, different first party: cba72a07d03cb61567214ce7ec54d1dd6ffcfe9eb2530011bc041e5832f78941, 7107c333350ea844eb7b6134e3d24940ae323b6bcbfd326af3d7cb9d7067feb3, f3de2fc486742419ecf04c4f58c558271aa7794eb4b45f348c081032556b6ebe, 5b100ace13c22a037264ac0c9d6f62c7cdec964d1c45ceb3445333f638b24072, bb24573c4d0ddea066c24bd9deffe12db9ff2985457aa2be8344dc3794eef7e5 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: 927cfa9de1361846b10f18ea1257914b2182e39738e549f2b777eeb4dc967a2e, 69477dcbdd11014b2995ee249e9d73f53040ccf32e94e4e42e2cff1ae110bc5e, c9f82252c660baf28717260b79d67420e05a544c18261c8918e07f5a2f15250c, e975b4e0bcac21ae893ad8b878c9e0369e04fb27f015ca81d81d79bce851b52b, 76f16450c3de31c9656ac183cfe23300a23722f44ebd027b36a9a20e70b4f5cc result, different first party: 1b04029c2f886c1b078c1f86bc69ff076eb929608fb36751d57dd6cb20ca1f6e, a198f3be47ffebd7e692f62fa2d49e74b91ce0a5a7d98a6028a5441076b97a32, f06203c69df44e8eb906f9d8a33cb0d20676906d724315299c1cacb5a65c95c6, 4892badab4d94a0ddb87d34eb2a0007dca38919ea22aca6dcbef313ad9d032f5, 6101c7bc0a24518b8e2df647f77a99bf04f2f78ff0b874188e5f3ae6d4983089 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: 0c0246bdaf18e80dea9092c5a7cd5af350504646fafa0df1739ca0cb7b62e8b2, cf3fbe1fc9fa6ec44e5162214692f580e63c68ff9d1f8e2dcfaafd9234d0fdb6, 8050b8d6b697eb54d809cca7e93f925033709dbe2a3aaebcabcdcbd0606b0073, 827561cfcc83f0d644e4a5fe47960f1cc0353b047875e21d4050adbfd6e703e0, 80ec81940e0d27dbac4d5f1f73244b588999540a14ffbb842091db29e0abdb7c result, different first party: e73829ca7d2208b9395dfb6749896d5be2983c5d11e6d3d464d8f5e96964b43b, 86763e32a4359c14d92005c0a85d24a32103bc2f870857ddd3872fde1cd0479f, 4b280e51f3f245bee61c6ad896aaa434eb23730d94bcc1783137762c9b684d3d, 84cbd35294c155bdc128ad2be59dfdbc6a6f006e77ed85a83c5e2a79936f9e1f, fdf015d9c479fdf8b384bb2b2e79465b031a3024317084de4fe602fa516c17c7 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: 9d4947da6de8314e3ac77435863957030c6afeaf54bb59406c6d790d1a7c3b19, 41e3d0c010f2b963100b42d1ef249c17ec29fd9484fae6d9452f3d6bf05d1d0d, bcb7f853bd04fdaae98c835ee19e167527cc7b6c181a353bcdd47faf89a92376, 9cf7ff6b659f049ea9cc7eded84ed8157567dafc5b4fe1754c2499ce3a809468, 4d3d63b848a5f92ea399e01052f0d0a216b8afa5baceec97469e1a3c9d068885 result, different first party: 612e8cc7fcea6991453637f5f438b6ebb4aa02fc7c7abf7bd42dbeef024add99, d7ef476c89c6c827d35fce6af85c36524b933d3db851586dff6a149cbe19300b, 3585c870d1b78b57fac7f400a94944a3ab727c696efcfc1e9ab8da51873dee58, a95a6a553c2dfaeeff17ffe427cdc14d5bfb992e38c9f248f50858a976c0a1cd, acbd7b033c235d1e929c51316438a72bc99de21c202e280b637293b2e3019d1d 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: 3fcdbdd8831375ef867d553423ea77e5989960f4b89024deb1473f64b97404be, 597bd634fe49d646c8d5c511902f25a81d0c8a7ee454f3a888925d6de2a9007a, e16811b5438f5afff3b1e5f0bc4f106d59de67ed8c9147ec00986540e6bd4189, a18604fd0c0421d0f0026f63495abd19648cf2257e6821da7c5e2ac1432391f8, dd5bb2d0c9da50cb76a62092afa64e32fb0123cbdc80a6f8576abb37148b606d result, different first party: 3b56a943bf6352a5383ad8a97e442a56075e63049e37d931353c149b1248e104, aa58625c61a4a271ec57094caba69520799969e36c9398702718efb79087cd9a, ef8a3d0842919fbb2d57cc56e4ed91afb604650716a769e6376bc72b4493a1cc, 2d1f9b9d35df21f455276b1352182dbd81bddfa3b8ecf0d9e9b4cb17ad6b182e, 910410294656b804cdce55daf3ed725e334d6f4b3f814186a847decef151236e 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: d8c7981a20b5bf0f935bd993b785bcd7fa7c5483cc33f553b80abe4cb2ada675, d6a3d25bc7a97ffda4c93507f221e2a1a64493f4fc8cec64d5244c735beab886, aca2192cdbc023c6a420d40c2b27d432cf21cf14e6f160ae31e88948273edf97, d5ef11807dbff09f20a33e7e546bbb4f462868c90df29feb07094423d0a71ff9, bf20d71c6fb8afa162dc7f9f77a781c1810177f449ecc608db0f5089a2b406a7 result, different first party: 8c8cab3735d5a5b0e988bca00be03632fa4a17d03f5a5338ad626c32df0174a3, e3be7b22d4ef0fc26ec41c2600ff621ad0f3e0f107f48e7203937f71417feab6, 9c8ba189c13fade44d0578e3e05d76c80616ce063633d84385b9eb4d876ee845, b96b4c1db682f7b984fadf24d4321c6b0da74686795f1fbc25ffeae665c62906, a79ea3d1c0a94532267fb87fa15704bd39a89b8226713fbb50842014cc4593f4 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: 7c731c8db61323e061b289339d63949cfb9dfaa910f6e274e51da3293ae3cc2d, b1b98f9ed6b090e8a531e4fe8860440dae56f3d71d49bdd62308eef0a1faef4d, a27700b665b1b7d40889c1f64bf8d19546c5fd195a811a8ead5c7782d9f1ab8b, d31b3683ab33a74b525ae84292221c33bdabfa9c66f998a9857dc23028853ea1, 4ee46867b78ffa22c4512167a176e0b14c556571456f7e6a074cacc81f2e287e result, different first party: 403bd6e99dc186a526c71fa3083a327469e7ee7ff95f372eb5a8d8af265dea0a, 8378968a08463459ebeaeed9ef63516fa83e5ec0aec36da67759f6a309b68c5e, 8dbd51479722ebc0878d1167c65586cc6e2be3d56b986a3055f9b7dab5565bf6, 766cfaa62bb8c09a5da74d0b172ea1cd6745c19d7d76eec763db24e588b7f061, 3e03f77b1b126e8bd8b737097a3067737fedd38dbf9f5142941db4496bc7a83d 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: 01b6946b956cd484fdfb6767e25686191a47827b362af1763b1cfea4308c269e, 9cd86cd2d496738e81a1e386a80151b3509516c54cda80c783885d2fc19f371c, 4b4408623fc148d45f88d1fb19604779fa681792226e502c7e766d95531dbccc, fe14a1e514d5811539020abc24cf4ef1075a842e7ef99cefbc7bf58ecfc9c249, 188e4ff2c1b1a5d817098dbc3f543830a0d7bc56d252f627585e7148e559b040 result, different first party: 18c708c86ec68493875a8d6a75bd02273f64222f01fdddd34c72cc97f9482abd, 930c8af0f7421d5aa57079155e8c92aeb5d03be93c233d5cac899169c2d30148, 7f4688fcc6eebe11841a7bb0cb9561dfb47793ed39df09eb8965379008f41b24, cd29228ea9635bbb4ece4cb7508ae6f397a9e53badeeacca1181f6234394cfef, b13e9f19ed50cfcf5ac0348435b12b52b7bb34b3b1339e379168e5201fc6712a unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, 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, 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: 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: 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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true 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 first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true 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 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: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true 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 first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. | write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same 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: 2, 1, 1, 1, 1 result, different first party: 3, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
Navigation testsWhich browsers prevent websites from sharing tracking data when you click on a link?
When you click a hyperlink to navigate your browser from one site to another, certain browser APIs allow the first site to communicate to the second site. These privacy vulnerabilities can be fixed by introducing new limits on how much data is transfered between sites.', | ||||||||||||
document.referrer
The Referer [sic] request header is a mechanism used by browsers to let a website know where the user is visiting from. This header is inherently tracking users across websites. In recent times, browsers have switched to a policy of trimming a referrer to convey less tracking information, but Referer continues to convey cross-site tracking data by default. | write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, 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: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
sessionStorage
The sessionStorage API is similar to the localStorage API, but it does not persist across tabs or across browser sessions. Nonetheless, it can be used to track users if they navigate from one website to another. This tracking can be thwarted by partitioning sessionStorage between websites. | write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 6b08516b-6570-43f7-b0be-994b64b83297, b3c0b764-1694-4606-a574-bd20bae88ebf, ff11ee75-0297-4921-b084-a1e50d015a81, c074b37f-8845-4ae6-9597-d35653e4a1e8, 0cd9bc56-c223-47da-845d-d89863e25b5d 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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, 5c932743-4914-4bfb-990e-7fec30b37d17, 7efb1829-a14a-4059-8f2f-c87a70d20550, cb5cb0af-58d5-4c11-bec1-4e6f4961858c, 6453fa6c-736b-4330-ae61-ffc98e5e7651 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: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 result, different first party: c2de2832-23f0-40f4-b115-d16b5d19e2b5, cec297a4-ab57-4f4a-864a-2f344d81840e, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3, ff65e9e0-3d17-43b5-9466-be17af1bf92f, 5b66b722-17d1-4891-8c1e-6d87801b5724 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2, fd84492e-9bb6-4592-a4a4-4accee642151, 68d1c313-6142-4ae8-8afb-c80456336653, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed, 1e427c1b-05a9-40da-86da-06b5fef221da 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: 58eb4d3d-e93b-456e-9c42-82926a183c7d, 08c014e5-66fb-469d-826a-9a7c0cc5dce4, 2617895e-ca04-4e76-8572-796ec6927c9f, be826c7c-356f-4728-b142-2e67dd425871, 61d2f896-fb76-46dd-8c68-3714cd861529 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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4, ececa7a9-a219-4808-96e4-424d475ecf77, 6a304f98-28fe-48e7-bc81-784524f46f56, ad602811-662e-4bf0-bc96-e3a5c692ef27, 17905561-5d43-44b4-92a7-423f801f946e 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: d051c148-5407-4bdd-a077-bfb85da31a5f, 5a5967a4-93ce-4679-830c-9e3da8a911ab, 3802560d-d657-4e32-b3f0-d141cbdcba07, d3ee86db-9b46-4e5b-8888-959dbb9b13a6, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a 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: 198a735f-2eb7-463e-9237-b167ea6b2faf, 0e2b28dc-69b6-426b-a79b-61463663b77f, 524e1c43-d711-4742-a9a9-6293371f056c, 057d3099-61b6-4071-b01c-626cfaa410b2, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 result, different first party: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663, e1222404-2fee-4a7a-b129-265717ea5eda, dba1531c-5070-42a1-8651-2b0448f009ae, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, 3baae986-6067-4f50-8b6a-e9bc394c9e25 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: da3cc1bf-a4fe-4deb-b990-118151fb0d94, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0, 712350c9-127f-492f-891b-ad59788b27b3, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e, e5aa0e20-a99a-401a-88d7-439f2901087b 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: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: c5688c7d-69b9-4a18-8428-34ead9f41327, cb767888-0acd-451c-87bd-5d62ab751366, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18, 24953eaf-775a-47aa-ad45-e7d185f9b75d, f5f4bb2a-aadd-4495-b326-6b71c06eec4d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017, 00fbc641-ac94-4300-b590-f958045ad3f9, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, 4c4d5e14-f724-474e-ae0b-9d134610b1ee unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
window.name
The window.name API allows websites to store data that will persist after the user has navigated the tab to a different website. This mechanism could be partitioned so that data is not allowed to persist between websites. | write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_6b08516b-6570-43f7-b0be-994b64b83297, name_b3c0b764-1694-4606-a574-bd20bae88ebf, name_ff11ee75-0297-4921-b084-a1e50d015a81, name_c074b37f-8845-4ae6-9597-d35653e4a1e8, name_0cd9bc56-c223-47da-845d-d89863e25b5d 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_a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, name_5c932743-4914-4bfb-990e-7fec30b37d17, name_7efb1829-a14a-4059-8f2f-c87a70d20550, name_cb5cb0af-58d5-4c11-bec1-4e6f4961858c, name_6453fa6c-736b-4330-ae61-ffc98e5e7651 result, different first party: name_a2413a1f-0ce3-49cf-971a-baf1ffc50ae1, name_5c932743-4914-4bfb-990e-7fec30b37d17, name_7efb1829-a14a-4059-8f2f-c87a70d20550, name_cb5cb0af-58d5-4c11-bec1-4e6f4961858c, name_6453fa6c-736b-4330-ae61-ffc98e5e7651 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_c2de2832-23f0-40f4-b115-d16b5d19e2b5, name_cec297a4-ab57-4f4a-864a-2f344d81840e, name_3f5740cf-7942-41e3-bd08-1dfa6e73eac3, name_ff65e9e0-3d17-43b5-9466-be17af1bf92f, name_5b66b722-17d1-4891-8c1e-6d87801b5724 result, different first party: name_c2de2832-23f0-40f4-b115-d16b5d19e2b5, name_cec297a4-ab57-4f4a-864a-2f344d81840e, name_3f5740cf-7942-41e3-bd08-1dfa6e73eac3, name_ff65e9e0-3d17-43b5-9466-be17af1bf92f, name_5b66b722-17d1-4891-8c1e-6d87801b5724 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_2779dd56-c284-422e-bf37-1ef4e7d0b4d2, name_fd84492e-9bb6-4592-a4a4-4accee642151, name_68d1c313-6142-4ae8-8afb-c80456336653, name_0b17bc4c-300c-4a49-ba7e-3abab088c4ed, name_1e427c1b-05a9-40da-86da-06b5fef221da result, different first party: name_2779dd56-c284-422e-bf37-1ef4e7d0b4d2, name_fd84492e-9bb6-4592-a4a4-4accee642151, name_68d1c313-6142-4ae8-8afb-c80456336653, name_0b17bc4c-300c-4a49-ba7e-3abab088c4ed, name_1e427c1b-05a9-40da-86da-06b5fef221da 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_58eb4d3d-e93b-456e-9c42-82926a183c7d, name_08c014e5-66fb-469d-826a-9a7c0cc5dce4, name_2617895e-ca04-4e76-8572-796ec6927c9f, name_be826c7c-356f-4728-b142-2e67dd425871, name_61d2f896-fb76-46dd-8c68-3714cd861529 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_2584e1a0-7620-47a9-8725-f9149c5f0ab4, name_ececa7a9-a219-4808-96e4-424d475ecf77, name_6a304f98-28fe-48e7-bc81-784524f46f56, name_ad602811-662e-4bf0-bc96-e3a5c692ef27, name_17905561-5d43-44b4-92a7-423f801f946e 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_d051c148-5407-4bdd-a077-bfb85da31a5f, name_5a5967a4-93ce-4679-830c-9e3da8a911ab, name_3802560d-d657-4e32-b3f0-d141cbdcba07, name_d3ee86db-9b46-4e5b-8888-959dbb9b13a6, name_096d4cf1-45ee-4a10-a73c-794f3d46ea5a 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_198a735f-2eb7-463e-9237-b167ea6b2faf, name_0e2b28dc-69b6-426b-a79b-61463663b77f, name_524e1c43-d711-4742-a9a9-6293371f056c, name_057d3099-61b6-4071-b01c-626cfaa410b2, name_dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 result, different first party: name_198a735f-2eb7-463e-9237-b167ea6b2faf, name_0e2b28dc-69b6-426b-a79b-61463663b77f, name_524e1c43-d711-4742-a9a9-6293371f056c, name_057d3099-61b6-4071-b01c-626cfaa410b2, name_dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78 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_8a3e4e2f-11ff-4e76-9a75-b99ba780d663, name_e1222404-2fee-4a7a-b129-265717ea5eda, name_dba1531c-5070-42a1-8651-2b0448f009ae, name_c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7, name_3baae986-6067-4f50-8b6a-e9bc394c9e25 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_da3cc1bf-a4fe-4deb-b990-118151fb0d94, name_952bfaf9-6cdd-4f66-a53e-5fa3c09370f0, name_712350c9-127f-492f-891b-ad59788b27b3, name_42e9f9e0-fe4a-47bc-b5da-f6276c04024e, name_e5aa0e20-a99a-401a-88d7-439f2901087b 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_c5688c7d-69b9-4a18-8428-34ead9f41327, name_cb767888-0acd-451c-87bd-5d62ab751366, name_2e78df64-cb3b-4b6e-9d45-35ba17e19b18, name_24953eaf-775a-47aa-ad45-e7d185f9b75d, name_f5f4bb2a-aadd-4495-b326-6b71c06eec4d result, different first party: name_c5688c7d-69b9-4a18-8428-34ead9f41327, name_cb767888-0acd-451c-87bd-5d62ab751366, name_2e78df64-cb3b-4b6e-9d45-35ba17e19b18, name_24953eaf-775a-47aa-ad45-e7d185f9b75d, name_f5f4bb2a-aadd-4495-b326-6b71c06eec4d 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_118ac5cd-4a61-4293-9ad5-701cd3d5d08f, name_2b6b5433-1d5a-47b8-813c-ecfc9faa0017, name_00fbc641-ac94-4300-b590-f958045ad3f9, name_3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, name_4c4d5e14-f724-474e-ae0b-9d134610b1ee result, different first party: name_118ac5cd-4a61-4293-9ad5-701cd3d5d08f, name_2b6b5433-1d5a-47b8-813c-ecfc9faa0017, name_00fbc641-ac94-4300-b590-f958045ad3f9, name_3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df, name_4c4d5e14-f724-474e-ae0b-9d134610b1ee unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
HTTPS testsWhich browsers prevent unencrypted network connections?
HTTPS is the protocol that web browsers use to connect securely to websites. When HTTPS is being used, the connection is encrypted so that third parties on the network cannot read content being sent between the server and your browser. In the past, insecure connections were the default and websites would need to actively request that a browser use HTTPS. Now the status quo is shifting, and browser makers are moving toward a world where HTTPS is the default protocol.` | ||||||||||||
Insecure website warning
Checks to see if the browser stops loading an insecure website and warns the user before giving them the option to continue. Known as HTTPS-Only Mode in some browsers. | passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded |
passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded |
passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded |
passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded |
passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded |
passed: true,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,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 |
Upgradable address
Checks to see if an insecure address entered into the browser's address bar is upgraded to HTTPS whenever possible. | upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
Upgradable hyperlink
Checks to see if the user has clicked on a hyperlink to an insecure address, if the browser upgrades that address to HTTPS whenever possible. | upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: true,true,true,true,true passed: true,true,true,true,true |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
upgraded: false,false,false,false,false passed: false,false,false,false,false |
Upgradable image
Checks to see if the browser attempts to upgrade an insecure address for an image to HTTPS whenever possible. | passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely |
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,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded |
Upgradable script
Checks to see if the browser attempts to upgrade an insecure address for an script to HTTPS whenever possible. | passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked |
passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked |
passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked |
passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked |
passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked |
passed: true,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,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 |
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,true |
SNI_status: encrypted passed: true,true,true,true,true |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,true,true,true,true |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
SNI_status: plaintext passed: false,false,false,false,false |
GPC enabled first-party
The Global Privacy Control is an HTTP header that can be sent by a browser to instruct a website not to sell the user's personal data to third parties. This test checks to see if the GPC header is sent by default to the top-level website. | header value: 1 passed: true,true,true,true,true |
header value: undefined passed: false,false,false,false,false |
header value: 1 passed: true,true,true,true,true |
header value: undefined passed: false,false,false,false,false |
header value: undefined passed: false,false,false,false,false |
header value: undefined passed: false,false,false,false,false |
header value: undefined passed: false,false,false,false,false |
header value: 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,false,false,false |
GPC enabled third-party
The Global Privacy Control is an HTTP header that can be sent by a browser to instruct a visited website not to sell the user's personal data to other parties. This test checks to see if the GPC header is sent to third-party elements on the web page. | sec-gpc: 1 passed: true,true,true,true,true |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
IP address leak
IP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address. | passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
passed: false,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,true,true,true |
passed: false,false,false,false,false |
passed: false,false,false,false,false |
Stream isolation
Browsers that use Tor can use a different Tor circuit per top-level website. | write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false |
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,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,false,false,false readSameFirstParty: 2001:67c:6ec:203:192:42:116:173,2a03:e600:100::68,185.246.188.73,77.48.28.236,107.174.231.197 readDifferentFirstParty: 2001:67c:6ec:203:192:42:116:181,2001:67c:6ec:203:192:42:116:187,2a0b:f4c2::19,2001:67c:289c:2::234,45.138.16.222 passed: true,true,true,true,true 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 |
Tor enabled
The Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default. | IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,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,true,true,true passed: true,true,true,true,true |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
IsTorExit: false,false,false,false,false passed: false,false,false,false,false |
Fingerprinting resistance testsWhich browsers hide what's unique about your device?
Fingerprinting is a technique trackers use to uniquely identify you as you browse the web. A fingerprinting script will measure several characteristics of your browser and, combining this data, will build a fingerprint that may uniquely identify you among web users. Browsers can introduce countermeasures, such as minimizing the distinguishing information disclosed by certain web APIs so your browser is harder to pick out from the crowd (so-called 'fingerprinting resistance').`, | ||||||||||||
Media query screen height
Height of the user's screen in pixels. | expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
Media query screen width
Width of the user's screen in pixels. | expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 980,980,980,980,980 desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 980,980,980,980,980 desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
outerHeight
Height of the browser window in pixels, including browser chrome. | expression: outerHeight desired expression: undefined actual value: 512,512,512,512,512 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 560,560,560,560,560 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 560,560,560,560,560 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 512,512,512,512,512 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 616,616,616,616,616 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 616,616,616,616,616 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 1524,1524,1524,1524,1524 desired value: undefined passed: true,true,true,true,true |
expression: outerHeight desired expression: undefined actual value: 504,504,504,504,504 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 520,520,520,520,520 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 1524,1524,1524,1524,1524 desired value: undefined passed: true,true,true,true,true |
expression: outerHeight desired expression: undefined actual value: 472,472,472,472,472 desired value: undefined passed: false,false,false,false,false |
expression: outerHeight desired expression: undefined actual value: 552,552,552,552,552 desired value: undefined passed: false,false,false,false,false |
screen.height
Height of the user's screen, in pixels. | expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1524,1524,1524,1524,1524 desired value: undefined passed: true,true,true,true,true |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 1524,1524,1524,1524,1524 desired value: undefined passed: true,true,true,true,true |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
expression: screen.height desired expression: undefined actual value: 640,640,640,640,640 desired value: undefined passed: false,false,false,false,false |
screen.width
Width of the user's screen, in pixels. | expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 980,980,980,980,980 desired value: undefined passed: true,true,true,true,true |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 980,980,980,980,980 desired value: undefined passed: true,true,true,true,true |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
expression: screen.width desired expression: undefined actual value: 360,360,360,360,360 desired value: undefined passed: false,false,false,false,false |
screenX
Position, in pixels, of the left edge of the browser window on screen. | expression: screenX desired expression: undefined actual value: 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: 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: 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: 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: 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: 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 |
screenY
Position, in pixels, of the top edge of the browser window on screen. | 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: 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: 24,24,24,24,24 desired value: undefined passed: false,false,false,false,false |
expression: screenY desired expression: undefined actual value: 80,80,80,80,80 desired value: undefined passed: false,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: 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: 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 |
Tracking query parameter testsWhich browsers remove URL parameters that can track you?
When you browse from one web page to another, tracking companies will frequently attach a 'tracking query parameter' to the address of the second web page. That query parameter may contain a unique identifier that tracks you individually as you browse the web. And these query parameters are frequently synchronized with cookies, making them a powerful tracking vector. Web browsers can protect you from known tracking query parameters by stripping them from web addresses before your browser sends them. (The set of tracking query parameters tested here was largely borrowed from Brave.)` | ||||||||||||
__hsfp
HubSpot tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
__hssc
HubSpot tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
__hstc
HubSpot tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
__s
Drip.com email address tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
_hsenc
HubSpot tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
_openstat
Yandex tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
dclid
DoubleClick Click ID (Google) | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
fbclid
Facebook Click Identifier | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
gclid
Google Click Identifier | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
hsCtaTracking
HubSpot tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
mc_eid
Mailchimp Email ID (email recipient's address) | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
mkt_tok
Adobe Marketo tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
ml_subscriber
MailerLite email tracking | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
ml_subscriber_hash
MailerLite email tracking | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
msclkid
Microsoft Click ID | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
oly_anon_id
Omeda marketing 'anonymous' customer id | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
oly_enc_id
Omeda marketing 'known' customer id | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
rb_clickid
Unknown high-entropy tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
s_cid
Adobe Site Catalyst tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
vero_conv
Vero tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
vero_id
Vero tracking parameter | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
wickedid
Wicked Reports e-commerce tracking | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
yclid
Yandex Click ID | passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
passed: true,true,true,true,true |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
value: 5472688134301975 passed: false,false,false,false,false |
Tracker content blocking testsWhich browsers block important known tracking scripts and pixels?
When you visit a web page, it frequently has third-party embedded tracking content, such as scripts and tracking pixels. These embedded components spy on you. Some browsers and browser extensions maintain list of tracking companies and block their content from being loaded. This section checks to see if a browser blocks 20 of the largest trackers listed by https://whotracks.me.` | ||||||||||||
Adobe
Tests whether the browser blocks the page from loading the tracker at https://munchkin.marketo.net/munchkin.js | url: https://munchkin.marketo.net/munchkin.js passed: true,true,true,true,true |
url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false,false |
url: https://munchkin.marketo.net/munchkin.js passed: true,true,true,true,true |
url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false,false |
url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false,false |
url: https://munchkin.marketo.net/munchkin.js passed: true,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,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,false,false,false |
Adobe Audience Manager
Tests whether the browser blocks the page from loading the tracker at https://dpm.demdex.net/ibs | url: https://dpm.demdex.net/ibs passed: true,true,true,true,true |
url: https://dpm.demdex.net/ibs passed: false,false,false,false,false |
url: https://dpm.demdex.net/ibs passed: true,true,true,true,true |
url: https://dpm.demdex.net/ibs passed: false,false,false,false,false |
url: https://dpm.demdex.net/ibs passed: false,false,false,false,false |
url: https://dpm.demdex.net/ibs passed: true,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,false,false,false |
url: https://dpm.demdex.net/ibs passed: false,false,false,false,false |
url: https://dpm.demdex.net/ibs passed: false,false,false,false,false |
Amazon adsystem
Tests whether the browser blocks the page from loading the tracker at https://s.amazon-adsystem.com/dcm | url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true |
url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false |
url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true |
url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false |
url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false |
url: https://s.amazon-adsystem.com/dcm passed: true,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: 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,false,false,false |
url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false |
AppNexus
Tests whether the browser blocks the page from loading the tracker at https://ib.adnxs.com/px?id=178248&t=1 | url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,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: 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,false,false,false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false |
Bing Ads
Tests whether the browser blocks the page from loading the tracker at https://bat.bing.com/bat.js | url: https://bat.bing.com/bat.js passed: true,true,true,true,true |
url: https://bat.bing.com/bat.js passed: false,false,false,false,false |
url: https://bat.bing.com/bat.js passed: true,true,true,true,true |
url: https://bat.bing.com/bat.js passed: false,false,false,false,false |
url: https://bat.bing.com/bat.js passed: false,false,false,false,false |
url: https://bat.bing.com/bat.js passed: true,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,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,false,false,false |
Chartbeat
Tests whether the browser blocks the page from loading the tracker at https://static.chartbeat.com/js/chartbeat.js | url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true |
url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false |
url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true |
url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false |
url: https://static.chartbeat.com/js/chartbeat.js passed: true,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,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,false,false,false |
Criteo
Tests whether the browser blocks the page from loading the tracker at https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx | url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,true,true,true,true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false,false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,true,true,true,true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false,false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false,false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,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,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,false,false,false |
DoubleClick (Google)
Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js | url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,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: 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,false,false,false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false |
Facebook tracking
Tests whether the browser blocks the page from loading the tracker at https://connect.facebook.net/en_US/fbevents.js | url: https://connect.facebook.net/en_US/fbevents.js passed: true,true,true,true,true |
url: https://connect.facebook.net/en_US/fbevents.js passed: false,false,false,false,false |
url: https://connect.facebook.net/en_US/fbevents.js passed: true,true,true,true,true |
url: https://connect.facebook.net/en_US/fbevents.js passed: false,false,false,false,false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false,false,false,false,false |
url: https://connect.facebook.net/en_US/fbevents.js passed: true,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,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,false,false,false |
Google (third-party ad pixel)
Tests whether the browser blocks the page from loading the tracker at https://www.google.com/pagead/1p-user-list/ | url: https://www.google.com/pagead/1p-user-list/ passed: true,true,true,true,true |
url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false |
url: https://www.google.com/pagead/1p-user-list/ passed: true,true,true,true,true |
url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false |
url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false |
url: https://www.google.com/pagead/1p-user-list/ passed: 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,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,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,false,false,false |
Google Analytics
Tests whether the browser blocks the page from loading the tracker at https://google-analytics.com/urchin.js | url: https://google-analytics.com/urchin.js passed: true,true,true,true,true |
url: https://google-analytics.com/urchin.js passed: false,false,false,false,false |
url: https://google-analytics.com/urchin.js passed: true,true,true,true,true |
url: https://google-analytics.com/urchin.js passed: false,false,false,false,false |
url: https://google-analytics.com/urchin.js passed: false,false,false,false,false |
url: https://google-analytics.com/urchin.js passed: true,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,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,false,false,false |
Google Tag Manager
Tests whether the browser blocks the page from loading the tracker at https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL | url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: 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,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,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,false,false,false |
Index Exchange
Tests whether the browser blocks the page from loading the tracker at https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 | url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,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: 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,false,false,false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false |
New Relic
Tests whether the browser blocks the page from loading the tracker at https://js-agent.newrelic.com/nr-1212.min.js | url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,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,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,false,false,false |
Quantcast
Tests whether the browser blocks the page from loading the tracker at https://pixel.quantserve.com/pixel | url: https://pixel.quantserve.com/pixel passed: true,true,true,true,true |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false |
url: https://pixel.quantserve.com/pixel passed: true,true,true,true,true |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false |
url: https://pixel.quantserve.com/pixel passed: true,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,false,false,false |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false |
url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false |
Scorecard Research Beacon
Tests whether the browser blocks the page from loading the tracker at https://sb.scorecardresearch.com/internal-c2/default/cs.js | url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,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,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,false,false,false |
Taboola
Tests whether the browser blocks the page from loading the tracker at https://trc.taboola.com/futureplc-tomsguide/trc/3/json | url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,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,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,false,false,false |
Twitter pixel
Tests whether the browser blocks the page from loading the tracker at https://t.co/i/adsct | url: https://t.co/i/adsct passed: true,true,true,true,true |
url: https://t.co/i/adsct passed: false,false,false,false,false |
url: https://t.co/i/adsct passed: true,true,true,true,true |
url: https://t.co/i/adsct passed: false,false,false,false,false |
url: https://t.co/i/adsct passed: false,false,false,false,false |
url: https://t.co/i/adsct passed: true,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,false,false,false |
url: https://t.co/i/adsct passed: false,false,false,false,false |
url: https://t.co/i/adsct passed: false,false,false,false,false |
Yandex Ads
Tests whether the browser blocks the page from loading the tracker at https://yandex.ru/ads/system/header-bidding.js | url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true |
url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false |
url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true |
url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false |
url: https://yandex.ru/ads/system/header-bidding.js passed: true,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,false,false,false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false |
Cross-session first-party tracking testsWhich browsers prevent websites from tracking you across browser sessions?
A common vulnerability of web browsers is that they allow websites ("first parties") to 'tag' your browser with some tracking data. This tag can be used to re-identify you when you return to a website you visited before. This category of leaks can be prevented by browser if they clean or isolate data between browser sessions. (In cases where a user has logged into a website or entered detailed information, it may be justifiable for a browser to retain information across sessions. These tests check when no such justification exists: when you have entered no significant information into a website, will the browser still retain data that allows you to be tracked across sessions?) | ||||||||||||
Alt-Svc
Alt-Svc allows the server to indicate to the web browser that a resource should be loaded on a different server. Because this is a persistent setting, it could be used to track users across websites if it is not correctly partitioned. | write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: 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: 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: h2, h3, h2, h3, h2 unsupported: false, false, false, false, false passed: true, false, true, false, 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: h2, h3, h3, h3, h3 result, different session: h2, h3, h2, h3, h2 unsupported: true, false, false, false, false passed: , false, true, false, 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: h2, h2, h2, h2, h2 result, different session: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h2, h2, h2, h2 result, different session: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: 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 |
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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p result, different session: c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p, c9a446a7-a65e-47c6-a279-e23fe3f6db18_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_1p result, different session: defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_1p, defabcfe-d4c3-44cd-98be-58dff46a19dd_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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p result, different session: cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p, cd166d3a-4d9a-42fa-a597-064e97131505_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p result, different session: 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_1p, 9d9aa524-9dbe-4a12-82eb-9db2d506176b_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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p result, different session: 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p result, different session: 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p, 4dbc3271-e290-42ad-a46c-7d5543158033_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p result, different session: bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p result, different session: 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p, 45e0d566-796f-48b2-8085-5812a25cf263_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p result, different session: a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p, a100212a-873c-4497-b5ee-050a836fbeeb_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p result, different session: 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p, 4792958b-c7cd-497b-8d79-51ad07609bcb_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. | write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_1p_http, b3c0b764-1694-4606-a574-bd20bae88ebf_1p_http, ff11ee75-0297-4921-b084-a1e50d015a81_1p_http, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p_http, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p_http result, different session: 6b08516b-6570-43f7-b0be-994b64b83297_1p_http, 6b08516b-6570-43f7-b0be-994b64b83297_1p_http, ff11ee75-0297-4921-b084-a1e50d015a81_1p_http, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p_http, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p_http unsupported: false, false, false, false, false passed: false, true, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p_http, 5c932743-4914-4bfb-990e-7fec30b37d17_1p_http, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p_http, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p_http, 6453fa6c-736b-4330-ae61-ffc98e5e7651_1p_http result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p_http, 5c932743-4914-4bfb-990e-7fec30b37d17_1p_http, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p_http, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p_http, 6453fa6c-736b-4330-ae61-ffc98e5e7651_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p_http, cec297a4-ab57-4f4a-864a-2f344d81840e_1p_http, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p_http, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p_http, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p_http result, different session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p_http, cec297a4-ab57-4f4a-864a-2f344d81840e_1p_http, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p_http, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p_http, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p_http, fd84492e-9bb6-4592-a4a4-4accee642151_1p_http, 68d1c313-6142-4ae8-8afb-c80456336653_1p_http, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p_http, 1e427c1b-05a9-40da-86da-06b5fef221da_1p_http result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p_http, fd84492e-9bb6-4592-a4a4-4accee642151_1p_http, 68d1c313-6142-4ae8-8afb-c80456336653_1p_http, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p_http, 1e427c1b-05a9-40da-86da-06b5fef221da_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p_http, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p_http, 2617895e-ca04-4e76-8572-796ec6927c9f_1p_http, be826c7c-356f-4728-b142-2e67dd425871_1p_http, 61d2f896-fb76-46dd-8c68-3714cd861529_1p_http result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p_http, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p_http, 2617895e-ca04-4e76-8572-796ec6927c9f_1p_http, be826c7c-356f-4728-b142-2e67dd425871_1p_http, 61d2f896-fb76-46dd-8c68-3714cd861529_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_1p_http, ececa7a9-a219-4808-96e4-424d475ecf77_1p_http, 6a304f98-28fe-48e7-bc81-784524f46f56_1p_http, ad602811-662e-4bf0-bc96-e3a5c692ef27_1p_http, 17905561-5d43-44b4-92a7-423f801f946e_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: d051c148-5407-4bdd-a077-bfb85da31a5f_1p_http, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p_http, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p_http, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p_http, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_1p_http result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_1p_http, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p_http, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p_http, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p_http, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p_http, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p_http, 524e1c43-d711-4742-a9a9-6293371f056c_1p_http, 057d3099-61b6-4071-b01c-626cfaa410b2_1p_http, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p_http result, different session: , 0e2b28dc-69b6-426b-a79b-61463663b77f_1p_http, 524e1c43-d711-4742-a9a9-6293371f056c_1p_http, 057d3099-61b6-4071-b01c-626cfaa410b2_1p_http, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p_http unsupported: false, false, false, false, false passed: true, 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p_http, e1222404-2fee-4a7a-b129-265717ea5eda_1p_http, dba1531c-5070-42a1-8651-2b0448f009ae_1p_http, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p_http, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p_http result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p_http, e1222404-2fee-4a7a-b129-265717ea5eda_1p_http, dba1531c-5070-42a1-8651-2b0448f009ae_1p_http, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p_http, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: da3cc1bf-a4fe-4deb-b990-118151fb0d94_1p_http, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0_1p_http, 712350c9-127f-492f-891b-ad59788b27b3_1p_http, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e_1p_http, e5aa0e20-a99a-401a-88d7-439f2901087b_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p_http, cb767888-0acd-451c-87bd-5d62ab751366_1p_http, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p_http, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p_http, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p_http result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p_http, cb767888-0acd-451c-87bd-5d62ab751366_1p_http, cb767888-0acd-451c-87bd-5d62ab751366_1p_http, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p_http, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p_http unsupported: false, false, false, false, false passed: false, false, true, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p_http, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p_http, 00fbc641-ac94-4300-b590-f958045ad3f9_1p_http, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p_http, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p_http result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p_http, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p_http, 00fbc641-ac94-4300-b590-f958045ad3f9_1p_http, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p_http, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. | write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_1p_js, b3c0b764-1694-4606-a574-bd20bae88ebf_1p_js, ff11ee75-0297-4921-b084-a1e50d015a81_1p_js, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p_js, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p_js result, different session: 6b08516b-6570-43f7-b0be-994b64b83297_1p_js, 6b08516b-6570-43f7-b0be-994b64b83297_1p_js, ff11ee75-0297-4921-b084-a1e50d015a81_1p_js, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p_js, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p_js unsupported: false, false, false, false, false passed: false, true, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p_js, 5c932743-4914-4bfb-990e-7fec30b37d17_1p_js, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p_js, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p_js, 6453fa6c-736b-4330-ae61-ffc98e5e7651_1p_js result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p_js, 5c932743-4914-4bfb-990e-7fec30b37d17_1p_js, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p_js, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p_js, 6453fa6c-736b-4330-ae61-ffc98e5e7651_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p_js, cec297a4-ab57-4f4a-864a-2f344d81840e_1p_js, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p_js, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p_js, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p_js result, different session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p_js, cec297a4-ab57-4f4a-864a-2f344d81840e_1p_js, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p_js, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p_js, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p_js, fd84492e-9bb6-4592-a4a4-4accee642151_1p_js, 68d1c313-6142-4ae8-8afb-c80456336653_1p_js, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p_js, 1e427c1b-05a9-40da-86da-06b5fef221da_1p_js result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p_js, fd84492e-9bb6-4592-a4a4-4accee642151_1p_js, 68d1c313-6142-4ae8-8afb-c80456336653_1p_js, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p_js, 1e427c1b-05a9-40da-86da-06b5fef221da_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p_js, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p_js, 2617895e-ca04-4e76-8572-796ec6927c9f_1p_js, be826c7c-356f-4728-b142-2e67dd425871_1p_js, 61d2f896-fb76-46dd-8c68-3714cd861529_1p_js result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p_js, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p_js, 2617895e-ca04-4e76-8572-796ec6927c9f_1p_js, be826c7c-356f-4728-b142-2e67dd425871_1p_js, 61d2f896-fb76-46dd-8c68-3714cd861529_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_1p_js, ececa7a9-a219-4808-96e4-424d475ecf77_1p_js, 6a304f98-28fe-48e7-bc81-784524f46f56_1p_js, ad602811-662e-4bf0-bc96-e3a5c692ef27_1p_js, 17905561-5d43-44b4-92a7-423f801f946e_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: d051c148-5407-4bdd-a077-bfb85da31a5f_1p_js, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p_js, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p_js, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p_js, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_1p_js result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_1p_js, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p_js, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p_js, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p_js, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p_js, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p_js, 524e1c43-d711-4742-a9a9-6293371f056c_1p_js, 057d3099-61b6-4071-b01c-626cfaa410b2_1p_js, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p_js result, different session: , 0e2b28dc-69b6-426b-a79b-61463663b77f_1p_js, 524e1c43-d711-4742-a9a9-6293371f056c_1p_js, 057d3099-61b6-4071-b01c-626cfaa410b2_1p_js, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p_js unsupported: false, false, false, false, false passed: true, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p_js, e1222404-2fee-4a7a-b129-265717ea5eda_1p_js, dba1531c-5070-42a1-8651-2b0448f009ae_1p_js, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p_js, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p_js result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p_js, e1222404-2fee-4a7a-b129-265717ea5eda_1p_js, dba1531c-5070-42a1-8651-2b0448f009ae_1p_js, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p_js, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: da3cc1bf-a4fe-4deb-b990-118151fb0d94_1p_js, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0_1p_js, 712350c9-127f-492f-891b-ad59788b27b3_1p_js, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e_1p_js, e5aa0e20-a99a-401a-88d7-439f2901087b_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=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p_js, cb767888-0acd-451c-87bd-5d62ab751366_1p_js, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p_js, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p_js, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p_js result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p_js, cb767888-0acd-451c-87bd-5d62ab751366_1p_js, cb767888-0acd-451c-87bd-5d62ab751366_1p_js, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p_js, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p_js unsupported: false, false, false, false, false passed: false, false, true, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p_js, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p_js, 00fbc641-ac94-4300-b590-f958045ad3f9_1p_js, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p_js, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p_js result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p_js, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p_js, 00fbc641-ac94-4300-b590-f958045ad3f9_1p_js, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p_js, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. | write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_1p, b3c0b764-1694-4606-a574-bd20bae88ebf_1p, ff11ee75-0297-4921-b084-a1e50d015a81_1p, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p result, different session: 6b08516b-6570-43f7-b0be-994b64b83297_1p, 6b08516b-6570-43f7-b0be-994b64b83297_1p, ff11ee75-0297-4921-b084-a1e50d015a81_1p, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p unsupported: false, false, false, false, false passed: false, true, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p, 5c932743-4914-4bfb-990e-7fec30b37d17_1p, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_1p result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p, 5c932743-4914-4bfb-990e-7fec30b37d17_1p, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p, cec297a4-ab57-4f4a-864a-2f344d81840e_1p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p result, different session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p, cec297a4-ab57-4f4a-864a-2f344d81840e_1p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p, fd84492e-9bb6-4592-a4a4-4accee642151_1p, 68d1c313-6142-4ae8-8afb-c80456336653_1p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p, 1e427c1b-05a9-40da-86da-06b5fef221da_1p result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p, fd84492e-9bb6-4592-a4a4-4accee642151_1p, 68d1c313-6142-4ae8-8afb-c80456336653_1p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p, 1e427c1b-05a9-40da-86da-06b5fef221da_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, 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: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p result, different session: , 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p unsupported: false, false, false, false, false passed: true, false, false, false, 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p unsupported: false, false, false, false, false passed: false, false, true, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. | write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_29498478440245335, fake_7915326587077367, fake_08496903005590162, fake_11239429056359795, fake_7231490580131292 result, different session: fake_29498478440245335, fake_7915326587077367, fake_08496903005590162, fake_11239429056359795, fake_7231490580131292 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_5536448407777661, fake_49715152515643335, fake_7390341333693653, fake_5620093034536504, fake_5399419268875565 result, different session: fake_5536448407777661, fake_49715152515643335, fake_7390341333693653, fake_5620093034536504, fake_5399419268875565 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_9716479819471291, fake_030706053088245477, fake_9444904672111771, fake_8738626938236622, fake_9163643246012763 result, different session: fake_9716479819471291, fake_030706053088245477, fake_9444904672111771, fake_8738626938236622, fake_9163643246012763 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_12213735112776658, fake_8049245414597441, fake_05899178888692247, fake_7686448946213569, fake_6160632633958889 result, different session: fake_12213735112776658, fake_8049245414597441, fake_05899178888692247, fake_7686448946213569, fake_6160632633958889 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_849723711119061, fake_9180439578062454, fake_6716864734747636, fake_3426441344591713, fake_26718095236663886 result, different session: fake_849723711119061, fake_9180439578062454, fake_6716864734747636, fake_3426441344591713, fake_26718095236663886 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_5661011761667882, fake_47127194372807635, fake_14921015582949448, fake_29516745896737073, fake_2715727174274911 result, different session: fake_12289078200018166, fake_8091249778328427, fake_14780678535471248, fake_10012356447079851, fake_6916930989511663 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_015604235068636063, fake_5398490158709928, fake_5965023999932157, fake_6975565019912244, fake_5314929416406702 result, different session: fake_015604235068636063, fake_5398490158709928, fake_5965023999932157, fake_6975565019912244, fake_5314929416406702 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_8852871637018431, fake_5316499543012567, fake_2401055540747472, fake_9837070901873664, fake_7315804963189758 result, different session: fake_8852871637018431, fake_5316499543012567, fake_2401055540747472, fake_9837070901873664, fake_7315804963189758 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_47944226781813915, fake_005736270766164342, fake_8045509863603464, fake_3613855498886227, fake_6102837111833201 result, different session: fake_47944226781813915, fake_005736270766164342, fake_8045509863603464, fake_3613855498886227, fake_6102837111833201 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_46329524447853454, fake_3739890771758141, fake_39726350040630676, fake_45503133530776996, fake_8847611355521181 result, different session: fake_4589620597368955, fake_3049277737013121, fake_06514706594168751, fake_24165967297389068, fake_5933530217919789 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_549850064487118, fake_8273325114007553, fake_7737576159650468, fake_283150005079988, fake_05687099406990992 result, different session: fake_549850064487118, fake_8273325114007553, fake_7737576159650468, fake_283150005079988, fake_05687099406990992 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_5427321757044572, fake_26169315170681084, fake_9337928290717956, fake_3007995532226826, fake_742008782152844 result, different session: fake_5427321757044572, fake_26169315170681084, fake_9337928290717956, fake_3007995532226826, fake_742008782152844 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
favicon cache
A favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites. | write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 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: (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: 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: (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: 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 |
fetch cache
When a resource is received via the Fetch API, it is frequently cached. That cache can potentially be abused for cross-site tracking. | write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 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, 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: 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 |
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. | write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 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, 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: 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 |
iframe cache
An iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking. | write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 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, 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: 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 |
image cache
Caching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. | write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 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, 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: 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 |
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: 6b08516b-6570-43f7-b0be-994b64b83297_1p, b3c0b764-1694-4606-a574-bd20bae88ebf_1p, ff11ee75-0297-4921-b084-a1e50d015a81_1p, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p result, different session: 6b08516b-6570-43f7-b0be-994b64b83297_1p, b3c0b764-1694-4606-a574-bd20bae88ebf_1p, ff11ee75-0297-4921-b084-a1e50d015a81_1p, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p, 0cd9bc56-c223-47da-845d-d89863e25b5d_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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p, 5c932743-4914-4bfb-990e-7fec30b37d17_1p, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_1p result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p, 5c932743-4914-4bfb-990e-7fec30b37d17_1p, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_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: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p, cec297a4-ab57-4f4a-864a-2f344d81840e_1p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p result, different session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p, cec297a4-ab57-4f4a-864a-2f344d81840e_1p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p, 5b66b722-17d1-4891-8c1e-6d87801b5724_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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p, fd84492e-9bb6-4592-a4a4-4accee642151_1p, 68d1c313-6142-4ae8-8afb-c80456336653_1p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p, 1e427c1b-05a9-40da-86da-06b5fef221da_1p result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p, fd84492e-9bb6-4592-a4a4-4accee642151_1p, 68d1c313-6142-4ae8-8afb-c80456336653_1p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p, 1e427c1b-05a9-40da-86da-06b5fef221da_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: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p, 2617895e-ca04-4e76-8572-796ec6927c9f_1p, be826c7c-356f-4728-b142-2e67dd425871_1p, 61d2f896-fb76-46dd-8c68-3714cd861529_1p result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p, 2617895e-ca04-4e76-8572-796ec6927c9f_1p, be826c7c-356f-4728-b142-2e67dd425871_1p, 61d2f896-fb76-46dd-8c68-3714cd861529_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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_1p, ececa7a9-a219-4808-96e4-424d475ecf77_1p, 6a304f98-28fe-48e7-bc81-784524f46f56_1p, ad602811-662e-4bf0-bc96-e3a5c692ef27_1p, 17905561-5d43-44b4-92a7-423f801f946e_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: d051c148-5407-4bdd-a077-bfb85da31a5f_1p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_1p result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_1p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_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: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p result, different session: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_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: da3cc1bf-a4fe-4deb-b990-118151fb0d94_1p, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0_1p, 712350c9-127f-492f-891b-ad59788b27b3_1p, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e_1p, e5aa0e20-a99a-401a-88d7-439f2901087b_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: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
localStorage
The localStorage API gives websites access to a key-value database that will remain available across visits. If the localStorage API is not partitioned or blocked, it can also be used to track users across websites. | write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_1p, b3c0b764-1694-4606-a574-bd20bae88ebf_1p, ff11ee75-0297-4921-b084-a1e50d015a81_1p, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p, 0cd9bc56-c223-47da-845d-d89863e25b5d_1p result, different session: 6b08516b-6570-43f7-b0be-994b64b83297_1p, b3c0b764-1694-4606-a574-bd20bae88ebf_1p, ff11ee75-0297-4921-b084-a1e50d015a81_1p, c074b37f-8845-4ae6-9597-d35653e4a1e8_1p, 0cd9bc56-c223-47da-845d-d89863e25b5d_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: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p, 5c932743-4914-4bfb-990e-7fec30b37d17_1p, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_1p result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_1p, 5c932743-4914-4bfb-990e-7fec30b37d17_1p, 7efb1829-a14a-4059-8f2f-c87a70d20550_1p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_1p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_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: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p, cec297a4-ab57-4f4a-864a-2f344d81840e_1p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p, 5b66b722-17d1-4891-8c1e-6d87801b5724_1p result, different session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_1p, cec297a4-ab57-4f4a-864a-2f344d81840e_1p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_1p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_1p, 5b66b722-17d1-4891-8c1e-6d87801b5724_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: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p, fd84492e-9bb6-4592-a4a4-4accee642151_1p, 68d1c313-6142-4ae8-8afb-c80456336653_1p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p, 1e427c1b-05a9-40da-86da-06b5fef221da_1p result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_1p, fd84492e-9bb6-4592-a4a4-4accee642151_1p, 68d1c313-6142-4ae8-8afb-c80456336653_1p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_1p, 1e427c1b-05a9-40da-86da-06b5fef221da_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: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p, 2617895e-ca04-4e76-8572-796ec6927c9f_1p, be826c7c-356f-4728-b142-2e67dd425871_1p, 61d2f896-fb76-46dd-8c68-3714cd861529_1p result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_1p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_1p, 2617895e-ca04-4e76-8572-796ec6927c9f_1p, be826c7c-356f-4728-b142-2e67dd425871_1p, 61d2f896-fb76-46dd-8c68-3714cd861529_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: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_1p, ececa7a9-a219-4808-96e4-424d475ecf77_1p, 6a304f98-28fe-48e7-bc81-784524f46f56_1p, ad602811-662e-4bf0-bc96-e3a5c692ef27_1p, 17905561-5d43-44b4-92a7-423f801f946e_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: d051c148-5407-4bdd-a077-bfb85da31a5f_1p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_1p result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_1p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_1p, 3802560d-d657-4e32-b3f0-d141cbdcba07_1p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_1p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_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: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p result, different session: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_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: da3cc1bf-a4fe-4deb-b990-118151fb0d94_1p, 952bfaf9-6cdd-4f66-a53e-5fa3c09370f0_1p, 712350c9-127f-492f-891b-ad59788b27b3_1p, 42e9f9e0-fe4a-47bc-b5da-f6276c04024e_1p, e5aa0e20-a99a-401a-88d7-439f2901087b_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: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
prefetch cache
A <link rel='prefetch'...> suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites. | write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 2, 1, 1, 1 result, different session: 1, 2, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 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 session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
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, 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, 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, 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, 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, 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, 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, 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: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p result, different session: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p unsupported: false, false, false, false, false passed: false, false, false, false, false 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_1p, e1222404-2fee-4a7a-b129-265717ea5eda_1p, dba1531c-5070-42a1-8651-2b0448f009ae_1p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_1p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_1p unsupported: false, false, false, false, false passed: false, false, false, false, false 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, 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: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_1p, cb767888-0acd-451c-87bd-5d62ab751366_1p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_1p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_1p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_1p unsupported: false, false, false, false, false passed: false, false, false, false, false 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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_1p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_1p, 00fbc641-ac94-4300-b590-f958045ad3f9_1p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_1p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_1p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. | write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
Cross-session third-party tracking testsWhich browsers prevent third-party trackers from tracking you across browser sessions?
A common vulnerability of web browsers is that they allow third-party trackers to 'tag' your browser with some tracking data. This tag can be used to re-identify you when you return to a website you visited before. This category of leaks can be prevented by browser if they clean or isolate data between browser sessions. (In cases where a user has logged into a website or entered detailed information, it may be justifiable for a browser to retain information across sessions. These tests check when no such justification exists: when you have entered no significant information into a website, will the browser still retain data that allows you to be tracked across sessions?) | ||||||||||||
Alt-Svc
Alt-Svc allows the server to indicate to the web browser that a resource should be loaded on a different server. Because this is a persistent setting, it could be used to track users across websites if it is not correctly partitioned. | write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h3, h3, h3, h3, h3 result, different session: 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: 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: h2, h3, h2, h3, h2 unsupported: false, false, false, false, false passed: true, false, true, false, 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: h2, h3, h2, h3, h2 unsupported: false, false, false, false, false passed: true, false, true, false, 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: h2, h2, h2, h2, h2 result, different session: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: h2, h2, h2, h2, h2 result, different session: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same session: 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 |
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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent. result, different session: Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent., Error: Failed to execute 'open' on 'CacheStorage': An attempt was made to break through the security policy of the user agent. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p result, different session: 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p, 22d8d73f-03b5-4e9b-80fc-3d784a3f7c82_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977 result, different session: 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977, 65f38c7b-7948-47a5-b2de-8c1265f66977 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p result, different session: f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p, f2bf3b31-d75d-41da-85bd-f2c3b703c3cd_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p result, different session: 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p, 84dab69e-dc0c-457f-bed7-51fcf51b6599_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: Error: The operation is insecure., Error: The operation is insecure., 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p result, different session: 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p, 1cd02ea3-ee08-4289-885b-fb60558d5441_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: c1037c12-9c44-482e-af82-8baaed910da4_3p, c1037c12-9c44-482e-af82-8baaed910da4_3p, c1037c12-9c44-482e-af82-8baaed910da4_3p, c1037c12-9c44-482e-af82-8baaed910da4_3p, c1037c12-9c44-482e-af82-8baaed910da4_3p result, different session: bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p, bd9df6f3-221d-4777-b213-c4c9eb6ccf3f_1p 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b result, different session: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: Error: The operation is insecure., Error: The operation is insecure., 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same session: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e result, different session: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97 result, different session: cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97, cdec529c-9cfc-4d18-9302-4e8e4ab22e97 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. | write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_3p_http, b3c0b764-1694-4606-a574-bd20bae88ebf_3p_http, ff11ee75-0297-4921-b084-a1e50d015a81_3p_http, c074b37f-8845-4ae6-9597-d35653e4a1e8_3p_http, 0cd9bc56-c223-47da-845d-d89863e25b5d_3p_http result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p_http, 5c932743-4914-4bfb-990e-7fec30b37d17_3p_http, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p_http, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p_http, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p_http result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p_http, 5c932743-4914-4bfb-990e-7fec30b37d17_3p_http, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p_http, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p_http, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p_http, fd84492e-9bb6-4592-a4a4-4accee642151_3p_http, 68d1c313-6142-4ae8-8afb-c80456336653_3p_http, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p_http, 1e427c1b-05a9-40da-86da-06b5fef221da_3p_http result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p_http, fd84492e-9bb6-4592-a4a4-4accee642151_3p_http, 68d1c313-6142-4ae8-8afb-c80456336653_3p_http, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p_http, 1e427c1b-05a9-40da-86da-06b5fef221da_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p_http, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p_http, 2617895e-ca04-4e76-8572-796ec6927c9f_3p_http, be826c7c-356f-4728-b142-2e67dd425871_3p_http, 61d2f896-fb76-46dd-8c68-3714cd861529_3p_http result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p_http, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p_http, 2617895e-ca04-4e76-8572-796ec6927c9f_3p_http, be826c7c-356f-4728-b142-2e67dd425871_3p_http, 61d2f896-fb76-46dd-8c68-3714cd861529_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_3p_http, ececa7a9-a219-4808-96e4-424d475ecf77_3p_http, 6a304f98-28fe-48e7-bc81-784524f46f56_3p_http, ad602811-662e-4bf0-bc96-e3a5c692ef27_3p_http, 17905561-5d43-44b4-92a7-423f801f946e_3p_http result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p_http, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p_http, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p_http, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p_http, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p_http result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p_http, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p_http, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p_http, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p_http, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: 198a735f-2eb7-463e-9237-b167ea6b2faf_3p_http, 0e2b28dc-69b6-426b-a79b-61463663b77f_3p_http, 524e1c43-d711-4742-a9a9-6293371f056c_3p_http, 057d3099-61b6-4071-b01c-626cfaa410b2_3p_http, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_3p_http result, different session: , 0e2b28dc-69b6-426b-a79b-61463663b77f_1p_http, 524e1c43-d711-4742-a9a9-6293371f056c_1p_http, 057d3099-61b6-4071-b01c-626cfaa410b2_1p_http, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p_http 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p_http, cb767888-0acd-451c-87bd-5d62ab751366_3p_http, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_3p_http, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p_http, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p_http result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p_http, cb767888-0acd-451c-87bd-5d62ab751366_3p_http, cb767888-0acd-451c-87bd-5d62ab751366_http, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p_http, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p_http unsupported: false, false, false, false, false passed: false, false, true, false, false test failed: false, false, false, false, false |
write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p_http, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p_http, 00fbc641-ac94-4300-b590-f958045ad3f9_3p_http, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p_http, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p_http result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p_http, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p_http, 00fbc641-ac94-4300-b590-f958045ad3f9_3p_http, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p_http, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. | write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_3p_js, b3c0b764-1694-4606-a574-bd20bae88ebf_3p_js, ff11ee75-0297-4921-b084-a1e50d015a81_3p_js, c074b37f-8845-4ae6-9597-d35653e4a1e8_3p_js, 0cd9bc56-c223-47da-845d-d89863e25b5d_3p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p_js, 5c932743-4914-4bfb-990e-7fec30b37d17_3p_js, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p_js, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p_js, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p_js result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p_js, 5c932743-4914-4bfb-990e-7fec30b37d17_3p_js, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p_js, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p_js, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p_js, fd84492e-9bb6-4592-a4a4-4accee642151_3p_js, 68d1c313-6142-4ae8-8afb-c80456336653_3p_js, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p_js, 1e427c1b-05a9-40da-86da-06b5fef221da_3p_js result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p_js, fd84492e-9bb6-4592-a4a4-4accee642151_3p_js, 68d1c313-6142-4ae8-8afb-c80456336653_3p_js, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p_js, 1e427c1b-05a9-40da-86da-06b5fef221da_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p_js, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p_js, 2617895e-ca04-4e76-8572-796ec6927c9f_3p_js, be826c7c-356f-4728-b142-2e67dd425871_3p_js, 61d2f896-fb76-46dd-8c68-3714cd861529_3p_js result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p_js, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p_js, 2617895e-ca04-4e76-8572-796ec6927c9f_3p_js, be826c7c-356f-4728-b142-2e67dd425871_3p_js, 61d2f896-fb76-46dd-8c68-3714cd861529_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_3p_js, ececa7a9-a219-4808-96e4-424d475ecf77_3p_js, 6a304f98-28fe-48e7-bc81-784524f46f56_3p_js, ad602811-662e-4bf0-bc96-e3a5c692ef27_3p_js, 17905561-5d43-44b4-92a7-423f801f946e_3p_js result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p_js, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p_js, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p_js, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p_js, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p_js result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p_js, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p_js, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p_js, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p_js, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 198a735f-2eb7-463e-9237-b167ea6b2faf_3p_js, 0e2b28dc-69b6-426b-a79b-61463663b77f_3p_js, 524e1c43-d711-4742-a9a9-6293371f056c_3p_js, 057d3099-61b6-4071-b01c-626cfaa410b2_3p_js, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_3p_js result, different session: , 0e2b28dc-69b6-426b-a79b-61463663b77f_1p_js, 524e1c43-d711-4742-a9a9-6293371f056c_1p_js, 057d3099-61b6-4071-b01c-626cfaa410b2_1p_js, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p_js unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p_js, cb767888-0acd-451c-87bd-5d62ab751366_3p_js, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_3p_js, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p_js, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p_js result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p_js, cb767888-0acd-451c-87bd-5d62ab751366_3p_js, cb767888-0acd-451c-87bd-5d62ab751366_js, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p_js, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p_js unsupported: false, false, false, false, false passed: false, false, true, false, false test failed: false, false, false, false, false |
write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p_js, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p_js, 00fbc641-ac94-4300-b590-f958045ad3f9_3p_js, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p_js, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p_js result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p_js, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p_js, 00fbc641-ac94-4300-b590-f958045ad3f9_3p_js, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p_js, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. | write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_3p, b3c0b764-1694-4606-a574-bd20bae88ebf_3p, ff11ee75-0297-4921-b084-a1e50d015a81_3p, c074b37f-8845-4ae6-9597-d35653e4a1e8_3p, 0cd9bc56-c223-47da-845d-d89863e25b5d_3p result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p, 5c932743-4914-4bfb-990e-7fec30b37d17_3p, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p, 5c932743-4914-4bfb-990e-7fec30b37d17_3p, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p, fd84492e-9bb6-4592-a4a4-4accee642151_3p, 68d1c313-6142-4ae8-8afb-c80456336653_3p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p, 1e427c1b-05a9-40da-86da-06b5fef221da_3p result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p, fd84492e-9bb6-4592-a4a4-4accee642151_3p, 68d1c313-6142-4ae8-8afb-c80456336653_3p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p, 1e427c1b-05a9-40da-86da-06b5fef221da_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different session: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: Error: Unsupported, Error: Unsupported, 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: 198a735f-2eb7-463e-9237-b167ea6b2faf_3p, 0e2b28dc-69b6-426b-a79b-61463663b77f_3p, 524e1c43-d711-4742-a9a9-6293371f056c_3p, 057d3099-61b6-4071-b01c-626cfaa410b2_3p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_3p result, different session: , 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p 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: , , , , result, different session: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 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: c5688c7d-69b9-4a18-8428-34ead9f41327_3p, cb767888-0acd-451c-87bd-5d62ab751366_3p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_3p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p, cb767888-0acd-451c-87bd-5d62ab751366_3p, cb767888-0acd-451c-87bd-5d62ab751366, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p unsupported: false, false, false, false, false passed: false, false, true, false, false test failed: false, false, false, false, false |
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p, 00fbc641-ac94-4300-b590-f958045ad3f9_3p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p, 00fbc641-ac94-4300-b590-f958045ad3f9_3p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. | write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same session: fake_20358210787348208, fake_7004794068690199, fake_33094074645046545, fake_04283665942123571, fake_5572210916021318 result, different session: fake_20358210787348208, fake_7004794068690199, fake_33094074645046545, fake_04283665942123571, fake_5572210916021318 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_26025921579520084, fake_4110686461038524, fake_5592501141225388, fake_0595466303425396, fake_8312440737226316 result, different session: fake_26025921579520084, fake_4110686461038524, fake_5592501141225388, fake_0595466303425396, fake_8312440737226316 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_03309230554891851, fake_05849843089170603, fake_09478233075116238, fake_4498754012458568, fake_5474207915312355 result, different session: fake_03309230554891851, fake_05849843089170603, fake_09478233075116238, fake_4498754012458568, fake_5474207915312355 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_15867829857048732, fake_07548510416221821, fake_396208041942373, fake_8710729875688206, fake_3327099176617876 result, different session: fake_15867829857048732, fake_07548510416221821, fake_396208041942373, fake_8710729875688206, fake_3327099176617876 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_6541838942949669, fake_08900535819706268, fake_019271357172917725, fake_6561062167588767, fake_9777289520436312 result, different session: fake_6541838942949669, fake_08900535819706268, fake_019271357172917725, fake_6561062167588767, fake_9777289520436312 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_9477592493762739, fake_09777347457593932, fake_8478764674297876, fake_3026092226769008, fake_41470708237321086 result, different session: fake_09100824082311454, fake_9553572634187217, fake_17762503878548985, fake_02848136503116261, fake_7186567300632347 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_821200522901, fake_09058106560627843, fake_07967981429008586, fake_9929243261130405, fake_9519017659056428 result, different session: fake_821200522901, fake_09058106560627843, fake_07967981429008586, fake_9929243261130405, fake_9519017659056428 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_9669499011629157, fake_31071110261117907, fake_33714871677124303, fake_8834794150287952, fake_4261832159232666 result, different session: fake_8852871637018431, fake_5316499543012567, fake_2401055540747472, fake_9837070901873664, fake_7315804963189758 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_8818406779220962, fake_1340475518127615, fake_02268129120665474, fake_6891206837445045, fake_6195502589685613 result, different session: fake_8818406779220962, fake_1340475518127615, fake_02268129120665474, fake_6891206837445045, fake_6195502589685613 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_6279481466077059, fake_808833301370756, fake_26994844649341143, fake_46042270936632, fake_4512640414708724 result, different session: fake_03838787951112965, fake_9810868993752169, fake_280476856695006, fake_6547114638485454, fake_5715379732021555 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_8072491917002975, fake_5672273279516591, fake_5942065905112679, fake_019779072836097145, fake_9879452520777754 result, different session: fake_8072491917002975, fake_5672273279516591, fake_5942065905112679, fake_019779072836097145, fake_9879452520777754 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_921994511440204, fake_6653875375242857, fake_7409850200476371, fake_5380781406375943, fake_23537635039235094 result, different session: fake_921994511440204, fake_6653875375242857, fake_7409850200476371, fake_5380781406375943, fake_23537635039235094 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
favicon cache
A favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites. | write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same session: 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: (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: 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: (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: 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 |
fetch cache
When a resource is received via the Fetch API, it is frequently cached. That cache can potentially be abused for cross-site tracking. | write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 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, 2 result, different session: 1, 1, 1, 1, 2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 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 |
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. | write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 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, 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: 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 |
iframe cache
An iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking. | write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 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, 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: 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 |
image cache
Caching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking. | write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same session: 1, 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, 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: 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 |
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: 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., Error: The user denied permission to access the database. result, different session: 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., Error: The user denied permission to access the database. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p, 5c932743-4914-4bfb-990e-7fec30b37d17_3p, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p, 5c932743-4914-4bfb-990e-7fec30b37d17_3p, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_3p, cec297a4-ab57-4f4a-864a-2f344d81840e_3p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_3p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_3p, 5b66b722-17d1-4891-8c1e-6d87801b5724_3p result, different session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_3p, cec297a4-ab57-4f4a-864a-2f344d81840e_3p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_3p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_3p, 5b66b722-17d1-4891-8c1e-6d87801b5724_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p, fd84492e-9bb6-4592-a4a4-4accee642151_3p, 68d1c313-6142-4ae8-8afb-c80456336653_3p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p, 1e427c1b-05a9-40da-86da-06b5fef221da_3p result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p, fd84492e-9bb6-4592-a4a4-4accee642151_3p, 68d1c313-6142-4ae8-8afb-c80456336653_3p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p, 1e427c1b-05a9-40da-86da-06b5fef221da_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p, 2617895e-ca04-4e76-8572-796ec6927c9f_3p, be826c7c-356f-4728-b142-2e67dd425871_3p, 61d2f896-fb76-46dd-8c68-3714cd861529_3p result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p, 2617895e-ca04-4e76-8572-796ec6927c9f_3p, be826c7c-356f-4728-b142-2e67dd425871_3p, 61d2f896-fb76-46dd-8c68-3714cd861529_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_3p, ececa7a9-a219-4808-96e4-424d475ecf77_3p, 6a304f98-28fe-48e7-bc81-784524f46f56_3p, ad602811-662e-4bf0-bc96-e3a5c692ef27_3p, 17905561-5d43-44b4-92a7-423f801f946e_3p result, different session: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 198a735f-2eb7-463e-9237-b167ea6b2faf_3p, 0e2b28dc-69b6-426b-a79b-61463663b77f_3p, 524e1c43-d711-4742-a9a9-6293371f056c_3p, 057d3099-61b6-4071-b01c-626cfaa410b2_3p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_3p result, different session: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_3p, e1222404-2fee-4a7a-b129-265717ea5eda_3p, dba1531c-5070-42a1-8651-2b0448f009ae_3p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_3p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_3p result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_3p, e1222404-2fee-4a7a-b129-265717ea5eda_3p, dba1531c-5070-42a1-8651-2b0448f009ae_3p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_3p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 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 (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p, cb767888-0acd-451c-87bd-5d62ab751366_3p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_3p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p, cb767888-0acd-451c-87bd-5d62ab751366_3p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_3p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p, 00fbc641-ac94-4300-b590-f958045ad3f9_3p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p, 00fbc641-ac94-4300-b590-f958045ad3f9_3p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
localStorage
The localStorage API gives websites access to a key-value database that will remain available across visits. If the localStorage API is not partitioned or blocked, it can also be used to track users across websites. | write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 6b08516b-6570-43f7-b0be-994b64b83297_3p, b3c0b764-1694-4606-a574-bd20bae88ebf_3p, ff11ee75-0297-4921-b084-a1e50d015a81_3p, c074b37f-8845-4ae6-9597-d35653e4a1e8_3p, 0cd9bc56-c223-47da-845d-d89863e25b5d_3p result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p, 5c932743-4914-4bfb-990e-7fec30b37d17_3p, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p result, different session: a2413a1f-0ce3-49cf-971a-baf1ffc50ae1_3p, 5c932743-4914-4bfb-990e-7fec30b37d17_3p, 7efb1829-a14a-4059-8f2f-c87a70d20550_3p, cb5cb0af-58d5-4c11-bec1-4e6f4961858c_3p, 6453fa6c-736b-4330-ae61-ffc98e5e7651_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_3p, cec297a4-ab57-4f4a-864a-2f344d81840e_3p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_3p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_3p, 5b66b722-17d1-4891-8c1e-6d87801b5724_3p result, different session: c2de2832-23f0-40f4-b115-d16b5d19e2b5_3p, cec297a4-ab57-4f4a-864a-2f344d81840e_3p, 3f5740cf-7942-41e3-bd08-1dfa6e73eac3_3p, ff65e9e0-3d17-43b5-9466-be17af1bf92f_3p, 5b66b722-17d1-4891-8c1e-6d87801b5724_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p, fd84492e-9bb6-4592-a4a4-4accee642151_3p, 68d1c313-6142-4ae8-8afb-c80456336653_3p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p, 1e427c1b-05a9-40da-86da-06b5fef221da_3p result, different session: 2779dd56-c284-422e-bf37-1ef4e7d0b4d2_3p, fd84492e-9bb6-4592-a4a4-4accee642151_3p, 68d1c313-6142-4ae8-8afb-c80456336653_3p, 0b17bc4c-300c-4a49-ba7e-3abab088c4ed_3p, 1e427c1b-05a9-40da-86da-06b5fef221da_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p, 2617895e-ca04-4e76-8572-796ec6927c9f_3p, be826c7c-356f-4728-b142-2e67dd425871_3p, 61d2f896-fb76-46dd-8c68-3714cd861529_3p result, different session: 58eb4d3d-e93b-456e-9c42-82926a183c7d_3p, 08c014e5-66fb-469d-826a-9a7c0cc5dce4_3p, 2617895e-ca04-4e76-8572-796ec6927c9f_3p, be826c7c-356f-4728-b142-2e67dd425871_3p, 61d2f896-fb76-46dd-8c68-3714cd861529_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 2584e1a0-7620-47a9-8725-f9149c5f0ab4_3p, ececa7a9-a219-4808-96e4-424d475ecf77_3p, 6a304f98-28fe-48e7-bc81-784524f46f56_3p, ad602811-662e-4bf0-bc96-e3a5c692ef27_3p, 17905561-5d43-44b4-92a7-423f801f946e_3p result, different session: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p result, different session: d051c148-5407-4bdd-a077-bfb85da31a5f_3p, 5a5967a4-93ce-4679-830c-9e3da8a911ab_3p, 3802560d-d657-4e32-b3f0-d141cbdcba07_3p, d3ee86db-9b46-4e5b-8888-959dbb9b13a6_3p, 096d4cf1-45ee-4a10-a73c-794f3d46ea5a_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 198a735f-2eb7-463e-9237-b167ea6b2faf_3p, 0e2b28dc-69b6-426b-a79b-61463663b77f_3p, 524e1c43-d711-4742-a9a9-6293371f056c_3p, 057d3099-61b6-4071-b01c-626cfaa410b2_3p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_3p result, different session: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p 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: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_3p, e1222404-2fee-4a7a-b129-265717ea5eda_3p, dba1531c-5070-42a1-8651-2b0448f009ae_3p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_3p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_3p result, different session: 8a3e4e2f-11ff-4e76-9a75-b99ba780d663_3p, e1222404-2fee-4a7a-b129-265717ea5eda_3p, dba1531c-5070-42a1-8651-2b0448f009ae_3p, c3c0c355-dc51-4c5d-8f0c-824ffb2c69c7_3p, 3baae986-6067-4f50-8b6a-e9bc394c9e25_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different session: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p, cb767888-0acd-451c-87bd-5d62ab751366_3p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_3p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p result, different session: c5688c7d-69b9-4a18-8428-34ead9f41327_3p, cb767888-0acd-451c-87bd-5d62ab751366_3p, 2e78df64-cb3b-4b6e-9d45-35ba17e19b18_3p, 24953eaf-775a-47aa-ad45-e7d185f9b75d_3p, f5f4bb2a-aadd-4495-b326-6b71c06eec4d_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p, 00fbc641-ac94-4300-b590-f958045ad3f9_3p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p result, different session: 118ac5cd-4a61-4293-9ad5-701cd3d5d08f_3p, 2b6b5433-1d5a-47b8-813c-ecfc9faa0017_3p, 00fbc641-ac94-4300-b590-f958045ad3f9_3p, 3dcd1cfe-c4da-4da5-a2e0-585c5be1a0df_3p, 4c4d5e14-f724-474e-ae0b-9d134610b1ee_3p unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
prefetch cache
A <link rel='prefetch'...> suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites. | write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 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 session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different session: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
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, 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, 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, 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, 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, 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, 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, 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: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. result, different session: 198a735f-2eb7-463e-9237-b167ea6b2faf_1p, 0e2b28dc-69b6-426b-a79b-61463663b77f_1p, 524e1c43-d711-4742-a9a9-6293371f056c_1p, 057d3099-61b6-4071-b01c-626cfaa410b2_1p, dd2a1da9-3ed5-4b34-ae59-d25dc60c2c78_1p 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: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. result, different session: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. 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, 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: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. result, different session: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. 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: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. result, different session: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false |
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. | write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same session: 1, 1, 1, 1, 1 result, different session: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |