Android Browsers

(default settings)

brave
1.49

bromite
108.0

chrome
111.0

duckduckgo
5.154

edge
110.0

firefox
111.1

focus
111.1

mull
110.1

opera
74.1

samsung
20.0

tor
102.2

vivaldi
5.7

yandex
23.3
State Partitioning tests Which 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-SvcAlt-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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 result, different first party: h2, h2, h2, h2 unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 result, different first party: h2, h2, h2, h2 unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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 = ""; await fetch("https://altsvc.privacytests2.org:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.privacytests2.org:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.privacytests2.org:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.privacytests2.org:4433/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
blobA '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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 result, different first party: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a result, different first party: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
BroadcastChannelA 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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: 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 passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
CacheStorageThe 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: e7e1d094-1dcf-4178-8ea3-9a768f8dac51, e7e1d094-1dcf-4178-8ea3-9a768f8dac51, e7e1d094-1dcf-4178-8ea3-9a768f8dac51, e7e1d094-1dcf-4178-8ea3-9a768f8dac51, e7e1d094-1dcf-4178-8ea3-9a768f8dac51 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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 result, different first party: eeb6640d-2f2b-44c7-a17e-361524b4f144, eeb6640d-2f2b-44c7-a17e-361524b4f144, eeb6640d-2f2b-44c7-a17e-361524b4f144, eeb6640d-2f2b-44c7-a17e-361524b4f144 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862 result, different first party: 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862, 0b5baaba-82c0-4236-b4e6-42f30babd862 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065 result, different first party: 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065, 9ad83bac-eb09-4c9f-9bb2-dd19b759b065 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866, 34c7b866-1e42-4f6b-b6df-5f36d6c3a866 result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: b73b39df-a2b0-465e-a88e-7641e12a30cd, b73b39df-a2b0-465e-a88e-7641e12a30cd, b73b39df-a2b0-465e-a88e-7641e12a30cd, b73b39df-a2b0-465e-a88e-7641e12a30cd, b73b39df-a2b0-465e-a88e-7641e12a30cd result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 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 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b result, different first party: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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. result, different first party: 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 passed: undefined test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e result, different first party: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 17a7b026-3643-44c2-a45b-496b4e6d5192_http, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd_http, 97ee105e-97ea-4ffb-b5be-50d750ab3f79_http, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef_http, 503a6dc9-c3c6-48c8-b671-de81fd753a1a_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0_http, b09f8430-e2ce-4712-8d42-00f05ffa41d2_http, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169_http, 211d1e17-ba5b-4478-a95f-5543b81a223e_http, 35eb5b30-4084-4cbe-9b7e-41948089ef7e_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 92802a1f-132f-4f55-ae75-728df82a29f5_http, b937fbe6-7592-41b7-8579-8291fe0032ee_http, 63d9cd59-5af1-445b-bc29-8d54a8511879_http, 3da42a7d-d131-4647-b3bc-88728d243106_http result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5_http, b937fbe6-7592-41b7-8579-8291fe0032ee_http, 63d9cd59-5af1-445b-bc29-8d54a8511879_http, 3da42a7d-d131-4647-b3bc-88728d243106_http unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f_http, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4_http, 11fcecb2-9fbf-4999-a684-354223d8b12a_http, b39b54fb-e464-47e5-b015-1253fea8479b_http, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea_http, 6d5c9411-112b-4b7c-a23f-359850b08c31_http, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3_http, 488523c7-f9f5-430a-93c5-94af61b7326b_http, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4_http result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea_http, 6d5c9411-112b-4b7c-a23f-359850b08c31_http, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3_http, 488523c7-f9f5-430a-93c5-94af61b7326b_http, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 227ecd88-f7ac-4581-8a80-7aa2e8de4350_http, 26eafb85-05a9-42bc-8444-827de1105a74_http, f0c25ecf-18e7-47cb-b202-596060f155e4_http, 2ecc070d-f234-4b74-b108-be4e1cab156f_http, c51ff024-96c6-4e28-ae4c-6682b681f780_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: b010e5ab-c60e-408e-9f27-03ad66a68353_http, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9_http, f095bd48-e900-4bd3-a67a-f321d3f75045_http, 0961a784-5278-469e-9a24-7b4db87e0f0d_http, f067b242-2519-4d5c-b682-822db01ac47a_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 9ce28136-8b23-4f9b-94ca-bb96374a073f_http, 73a74fde-44c3-4fc8-a73a-15b8034fa51e_http, 3f270ae1-77f2-4528-89be-9f10daf3bba0_http, 17475059-809c-4dc0-a45a-e6c5a638599b_http, f1f88358-aabe-41e5-a4c9-f294ce50ea7a_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85_http, 68d1f735-8916-4af3-b800-643811bd59d1_http, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e_http, 29dde574-76ac-4d4c-95f9-b3fd6a755933_http, ad3ff89e-dad9-4db2-917d-06638aaaa9d3_http result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85_http, 68d1f735-8916-4af3-b800-643811bd59d1_http, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e_http, 29dde574-76ac-4d4c-95f9-b3fd6a755933_http, ad3ff89e-dad9-4db2-917d-06638aaaa9d3_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: b236c548-4f26-4b77-b272-59c06ca834fb_http, 8adab197-940d-4cf5-8cf2-ca440923595b_http, 38271ad0-7092-4d63-a5e2-8d2679d1ad65_http, 2838059e-52e8-481c-8f9f-6ae1c38fae81_http, b40cd9af-318d-4d4b-ab1c-d54361b76207_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: bca0f488-3f39-4679-8796-e40748013457_http, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd_http, 7969aee9-9abc-4736-84c1-d20adfabb63d_http, 65348339-cf6f-4a97-af61-f39841da933d_http result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28_http, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b_http, 7b9a6639-f84c-4cea-8821-51b029bb00c2_http, 9f79f839-8dc5-4529-bd68-74d081f4e833_http, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb_http result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28_http, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b_http, 7b9a6639-f84c-4cea-8821-51b029bb00c2_http, 9f79f839-8dc5-4529-bd68-74d081f4e833_http, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: e10b2895-c782-4e2d-9cbf-29d926f92960_http, c9d7a89d-25b6-4d14-af67-b7c88e669eed_http, c80130bd-bee6-4335-9a8b-4506ddeba85e_http, 98c89a32-9f55-414b-aec5-552ac7b31bf8_http, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3_http result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960_http, c9d7a89d-25b6-4d14-af67-b7c88e669eed_http, c80130bd-bee6-4335-9a8b-4506ddeba85e_http, 98c89a32-9f55-414b-aec5-552ac7b31bf8_http, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
cookie (JS)The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them.
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 17a7b026-3643-44c2-a45b-496b4e6d5192_js, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd_js, 97ee105e-97ea-4ffb-b5be-50d750ab3f79_js, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef_js, 503a6dc9-c3c6-48c8-b671-de81fd753a1a_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 0bc23788-bb00-4e32-b89c-ed85be80b3e0_js, b09f8430-e2ce-4712-8d42-00f05ffa41d2_js, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169_js, 211d1e17-ba5b-4478-a95f-5543b81a223e_js, 35eb5b30-4084-4cbe-9b7e-41948089ef7e_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 92802a1f-132f-4f55-ae75-728df82a29f5_js, b937fbe6-7592-41b7-8579-8291fe0032ee_js, 63d9cd59-5af1-445b-bc29-8d54a8511879_js, 3da42a7d-d131-4647-b3bc-88728d243106_js result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5_js, b937fbe6-7592-41b7-8579-8291fe0032ee_js, 63d9cd59-5af1-445b-bc29-8d54a8511879_js, 3da42a7d-d131-4647-b3bc-88728d243106_js unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f_js, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4_js, 11fcecb2-9fbf-4999-a684-354223d8b12a_js, b39b54fb-e464-47e5-b015-1253fea8479b_js, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea_js, 6d5c9411-112b-4b7c-a23f-359850b08c31_js, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3_js, 488523c7-f9f5-430a-93c5-94af61b7326b_js, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4_js result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea_js, 6d5c9411-112b-4b7c-a23f-359850b08c31_js, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3_js, 488523c7-f9f5-430a-93c5-94af61b7326b_js, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 227ecd88-f7ac-4581-8a80-7aa2e8de4350_js, 26eafb85-05a9-42bc-8444-827de1105a74_js, f0c25ecf-18e7-47cb-b202-596060f155e4_js, 2ecc070d-f234-4b74-b108-be4e1cab156f_js, c51ff024-96c6-4e28-ae4c-6682b681f780_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: b010e5ab-c60e-408e-9f27-03ad66a68353_js, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9_js, f095bd48-e900-4bd3-a67a-f321d3f75045_js, 0961a784-5278-469e-9a24-7b4db87e0f0d_js, f067b242-2519-4d5c-b682-822db01ac47a_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 9ce28136-8b23-4f9b-94ca-bb96374a073f_js, 73a74fde-44c3-4fc8-a73a-15b8034fa51e_js, 3f270ae1-77f2-4528-89be-9f10daf3bba0_js, 17475059-809c-4dc0-a45a-e6c5a638599b_js, f1f88358-aabe-41e5-a4c9-f294ce50ea7a_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85_js, 68d1f735-8916-4af3-b800-643811bd59d1_js, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e_js, 29dde574-76ac-4d4c-95f9-b3fd6a755933_js, ad3ff89e-dad9-4db2-917d-06638aaaa9d3_js result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85_js, 68d1f735-8916-4af3-b800-643811bd59d1_js, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e_js, 29dde574-76ac-4d4c-95f9-b3fd6a755933_js, ad3ff89e-dad9-4db2-917d-06638aaaa9d3_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: b236c548-4f26-4b77-b272-59c06ca834fb_js, 8adab197-940d-4cf5-8cf2-ca440923595b_js, 38271ad0-7092-4d63-a5e2-8d2679d1ad65_js, 2838059e-52e8-481c-8f9f-6ae1c38fae81_js, b40cd9af-318d-4d4b-ab1c-d54361b76207_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: bca0f488-3f39-4679-8796-e40748013457_js, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd_js, 7969aee9-9abc-4736-84c1-d20adfabb63d_js, 65348339-cf6f-4a97-af61-f39841da933d_js result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28_js, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b_js, 7b9a6639-f84c-4cea-8821-51b029bb00c2_js, 9f79f839-8dc5-4529-bd68-74d081f4e833_js, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb_js result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28_js, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b_js, 7b9a6639-f84c-4cea-8821-51b029bb00c2_js, 9f79f839-8dc5-4529-bd68-74d081f4e833_js, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: e10b2895-c782-4e2d-9cbf-29d926f92960_js, c9d7a89d-25b6-4d14-af67-b7c88e669eed_js, c80130bd-bee6-4335-9a8b-4506ddeba85e_js, 98c89a32-9f55-414b-aec5-552ac7b31bf8_js, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3_js result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960_js, c9d7a89d-25b6-4d14-af67-b7c88e669eed_js, c80130bd-bee6-4335-9a8b-4506ddeba85e_js, 98c89a32-9f55-414b-aec5-552ac7b31bf8_js, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
CookieStoreThe 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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e 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: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 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: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 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 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
CSS cacheCSS 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_5203739693235072, fake_8159270533795671, fake_5903417246014457, fake_3134689739686469, fake_8214504224909798 result, different first party: fake_442921106572153, fake_5359646819252035, fake_0846065317115059, fake_6551015025857907, fake_7454652898708958 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_3840113243467105, fake_38017584609488386, fake_7864262532185828, fake_7055326255728553, fake_290894173706187 result, different first party: fake_2689697355487197, fake_90675850627341, fake_31560758591013327, fake_21894892970786461, fake_4188721305685319 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_3860538783578553, fake_022964743165657442, fake_27083934221767314, fake_15542955843299522 result, different first party: fake_3860538783578553, fake_017197658397959392, fake_4089134467633302, fake_7683462537411858 unsupported: false, false, false, false passed: false, true, true, true test failed: false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_2129345952351973, fake_14575527540969357, fake_021985397116059513, fake_18742367182922082, fake_396596058433635 result, different first party: fake_2129345952351973, fake_14575527540969357, fake_021985397116059513, fake_18742367182922082, fake_396596058433635 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_48199441132616405, fake_387132296198188, fake_598643484072332, fake_603131623600401, fake_27286631610549117 result, different first party: fake_5810104738296746, fake_5967714309466021, fake_4850638409569068, fake_012149787319129413, fake_9922700975474454 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_681011920986567, fake_1886755888615519, fake_3381149987753356, fake_4678765959689899, fake_28581867490922264 result, different first party: fake_6013767724647743, fake_16079976978490396, fake_14885812495385364, fake_448653360317419, fake_4634244861350887 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_9988909699356048, fake_8912055065955433, fake_3290320805652891, fake_8997197017455796, fake_8769212811974074 result, different first party: fake_03469615366599266, fake_1326785689076797, fake_4207712531050558, fake_6939135962946752, fake_392837875665206 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_6539583811470628, fake_5765862590215793, fake_09275252285896207, fake_574006690823099, fake_18210745596609668 result, different first party: fake_28438480733873184, fake_5619733279586216, fake_2388039204950796, fake_366183038454309, fake_7246725541220729 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_6057670620602822, fake_22480982294353558, fake_3641837075068739, fake_9198087186154313, fake_35926028736939974 result, different first party: fake_6057670620602822, fake_22480982294353558, fake_3641837075068739, fake_9198087186154313, fake_35926028736939974 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_2031796874208769, fake_7216129160657399, fake_5240684769260033, fake_3076985745248446, fake_39370918662158805 result, different first party: fake_00028828040027395474, fake_6317420677344585, fake_5100395758929732, fake_6210902293939735, fake_1948316004070909 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_07412528868923407, fake_05374540731775479, fake_9733311191092471, fake_9165953983302779 result, different first party: fake_38403692487325536, fake_331584738572289, fake_6282115002399846, fake_12330261463869041 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_7700697587885617, fake_13458889405052976, fake_260340703639776, fake_2690616581664991, fake_19924457943820473 result, different first party: fake_4917563366822655, fake_7793490721272625, fake_522783351268532, fake_262184133999682, fake_4559656513226029 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_6233054006035723, fake_3909162865336149, fake_5547462155727008, fake_15152573163614336, fake_25222171365006885 result, different first party: fake_5407717330133299, fake_1312630047047978, fake_7830478869872821, fake_19866890224156464, fake_23334804680311372 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
favicon cacheA 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(500); 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(500); 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(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); 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(500); 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(500); 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(500); 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(500); 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(500); 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(500); 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(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); 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(500); 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 cacheWhen 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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: 1, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
font cacheWeb 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 1, 2, 1, 2 unsupported: false, false, false, false passed: false, true, false, true test failed: false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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, 2, 1, 2, 1 unsupported: false, false, false, false, false passed: false, true, false, true, 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); 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
getDirectorynavigator.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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt", { create: true }); const stream = await fileHandle.createWritable(); await stream.write(secret); await stream.close(); } catch (e) { throw new Error("Unsupported"); } } read: async () => { try { const root = await navigator.storage.getDirectory(); const fileHandle = await root.getFileHandle("secret.txt"); const file = await fileHandle.getFile(); return file.text(); } catch (e) { throw new Error("Unsupported"); } } result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 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: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 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: 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: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: 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: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
H1 connectionHTTP/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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
H2 connectionHTTP/2 is a web connection protocol introduced in 2015. Some browsers re-use HTTP/2 connections across websites and can thus be used to track users.
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
H3 connectionHTTP/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: c71d11545f463006509bfdbeea9611b2, bc9e4fdbbce53a96da0f93ae442c1674, 24803ca92ad1c8db7fd49ce5a37b531c, a86b3e83f64507616c129db4d6238311, 600ac1cc443f3454dcfee7ed1c55d351 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: 6edbd35d55736832a0eb691cc0fa5a64, bf1827d8a59c94ce2c78ca70f8fa8b46, be0bd6a720533271387e187237b8e1e7, 3d9ea1edba0a73e469d81b436d8683ef, 1fca5a5cd23debbd305cf82171826b17 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 passed: undefined test failed: false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: f9aede67919cea68a3e9e76855240284, a5ec1da8292e8970cd5e634d778eb285, 8e19de5b63a825c75be94aa2187412aa, b92dfa433c4a6f9dfd6fb24315f179d3, 5f4420f4303b66b1d7998d5b429b191e result, different first party: f9aede67919cea68a3e9e76855240284, a5ec1da8292e8970cd5e634d778eb285, 8e19de5b63a825c75be94aa2187412aa, b92dfa433c4a6f9dfd6fb24315f179d3, 5f4420f4303b66b1d7998d5b429b191e 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: e96f88107fe9e5c7ffd66e85ad8e0d3a, 572a102148c3d9d64d9e725583bc6865, c09b36a0070461ef69b667572632644a, f3785bedd58f78ac6710ad104c4e96b4, ba4fd88c4ff14435e98c59b3ac575873 result, different first party: e96f88107fe9e5c7ffd66e85ad8e0d3a, 572a102148c3d9d64d9e725583bc6865, c09b36a0070461ef69b667572632644a, f3785bedd58f78ac6710ad104c4e96b4, ba4fd88c4ff14435e98c59b3ac575873 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: 6d069dddf05782deefef8ac2bcc795e2, a276cc4c58572a3b1783396a38f4e116, 67fdf4e4c78c47bb68348865e7c48f1c, ff5c1f17f6e123b7d6ff697c7fb13c8a, c4bf0716493aa80b3230af74cc87b72b 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: 930c6fbf74d903c97dad373845e67a4e, 30f75d9b5f61cf0cd5ce64f07e272730, 32a88a7b814d3624af26b45718bf1dc0, 0866c26c3fd40d8f5161959f4f6712b4, d2491c4e1a28e70497acc4311b7831b0 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: 1c7ad11bfbd03fe1e0679c99507121ae, c44ed1b905fb6d7b5caa58028bef7dc7, 907864941b9aa0ba3cd3430952ccb111, c49cef7389b57593950aa8d394c5b7e5, 0d1088d7af3bc9acaceb21c68bc4a92f 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: 1ccb227585d6acb9111fb1a8fbf06590, 8f9cab90f4c18e0d9b1110ae730e1be3, 0d51bd8c29b9d30b133ac5b023dd96a4, a7dc84b28e0287e4bde00e36f1a87505, 89b09dff94392f73591254dd484a5a32 result, different first party: 1ccb227585d6acb9111fb1a8fbf06590, 8f9cab90f4c18e0d9b1110ae730e1be3, 0d51bd8c29b9d30b133ac5b023dd96a4, a7dc84b28e0287e4bde00e36f1a87505, 89b09dff94392f73591254dd484a5a32 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: , , , , 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 passed: undefined test failed: false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: f28637d0d9131f42a076247e8e5d29b0, 252c5a9711ef4fde2487def441a2d6ea, 9fcd3b7f9ac145f66b99b4b830e4d738, 05a64a2b29896eb024a7251ee4063343, a1870c53ce92d1c98cfa9bb547c7830f result, different first party: f28637d0d9131f42a076247e8e5d29b0, 252c5a9711ef4fde2487def441a2d6ea, 9fcd3b7f9ac145f66b99b4b830e4d738, 05a64a2b29896eb024a7251ee4063343, a1870c53ce92d1c98cfa9bb547c7830f 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: 91a027537f4e43219386ea60af4076ea, d7f186cadad211aab08dbf3d642500ae, 2715089bf78dfd66340e02867720abad, 9952e50e1e5de03c6f7a75210e882a31, ccb44707ef554f0005f8600000e12ca8 result, different first party: 91a027537f4e43219386ea60af4076ea, d7f186cadad211aab08dbf3d642500ae, 2715089bf78dfd66340e02867720abad, 9952e50e1e5de03c6f7a75210e882a31, ccb44707ef554f0005f8600000e12ca8 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
HSTS cacheThe 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 result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, 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 unsupported: , , , passed: true, true, true, true test failed: false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, 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 cacheAn 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
image cacheCaching 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 result, different first party: 1, 2, 2, 2 unsupported: false, false, false, false passed: false, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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: 1, 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
indexedDBThe 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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e 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: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 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: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 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: Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations. result, different first party: Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations. 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 first party: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a 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: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 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: Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations. result, different first party: 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 passed: undefined test failed: false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
localStorageThe 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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e result, different first party: Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document. 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: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 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: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 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: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a 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: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a 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: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 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: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: 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 passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
locksnavigator.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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e 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: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 result, different first party: Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a result, different first party: Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a 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: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
prefetch cacheA 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 result, different first party: 1, 2, 2, 2 unsupported: false, false, false, false passed: false, true, true, true test failed: false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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: 1, 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: 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 unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 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
ServiceWorkerThe ServiceWorker API allows websites to run code in the background and store content in the browser for offline use. If a ServiceWorker can be accessed from multiple websites, it can be abused to track users across sites.
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: 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: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: 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: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
SharedWorkerThe 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"); return messagePromise; } 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"); return messagePromise; } 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"); return messagePromise; } result, same first party: 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 unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } 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"); return messagePromise; } 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"); return messagePromise; } result, same first party: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 result, different first party: none, none, none, none, none unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a result, different first party: none, none, none, none, none unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a result, different first party: none, none, none, none, none unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } 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"); return messagePromise; } 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"); return messagePromise; } result, same first party: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: 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 passed: true, true, true, true test failed: false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } 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"); return messagePromise; } 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 IDThe 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: f79a50129916304dd26b4dc7f1cef5cfebd889ca662dd83f9aa351fa515cb75e, 680d6cc9970b6eff8e8be967b24496e1a74e7381e45d01740052a25c5c7ce61e, 410ef14e0b2c5b4f09cc4a57427e3c73c3423afa9dbab8fbe20902c9ddf87715, f65b4db905e07697343e371f431e3791dcdde7fdd88379d4f38f90cda8f8f1da, 2cc5997cc5a82abc2730d420309412a93efe073aaaae41621e2b7ecc2932040d result, different first party: 26151c438b47b4e6026e5ab3646a3c92d2829c8fea1984f7052618c44f015d89, 09d75376c44658f50ea7c50f354616ff9a6cca8a9e9914944eb46ebd565dd9c2, 8feeae9cd49633bc672ea15da887aa7fbb2c89e132a0775c1a6d0539614df8e1, b0d5194fc4dbea37028eb539f681b205fb2cd0d6ccb6054ddc85d08bf357edc2, ad3d750a0f8967deceaafd5c440cccd10fe1fdcb3e902f857fe5e73d22e4d3e7 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: eeed8b616d2dc97b00b2cdce2558615e0c17d73644a4b7875a19e0cad1cefd1f, 6fd611042a33128cb1da7b7f5327c42099c362e218d952abf6bd0327529b61cf, 42b600184d3b6494cdc1a8e7f2487ffa19d973a742d055c0899a806be65764b1, 414c91a8efbf95b2049ec5abb6d0b1009bffd5cf9e3e1e85c60734903df3bae6, fb23ef025d070bcc0d2cd18b71acfbf6fb3df1720928113fe5210ed233fee439 result, different first party: ed04839ee3c47eb6b942b6293e7f93d6a2076fd2f6275fcd0cb55cd57f7daa43, 715b42f735547f011bc1acbb7a72d54de306cf625a4fcf708fda67a19f4452f7, 934e7bf5611ee9c8e5e47a43910ddebbd38fc2fd7708224422b7872799100c72, 6fbdb302d408dcd5d1d983dba934cf1f40eec8447f056e06297b09c51af2ec0e, 850a052ee36df56f08d5d8022e6a1a6ed15dac21de6ccccb707a56ddedefea21 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: 2efd18e354873d774e6b96aee16adb63ce5edfd3027b430995d622a9b06adcae, 7687490ba63b77c043aa425f7b350a64e4691e5b6ab178cb0489bb53477fc87f, 55cf56ed8c86aab5642ce00e8d952fca9e7b48e9cbc4b2af42fb39c23f6d3321, f481a1887a72e66e84a5301342fafec5f8fba9e9fce078f14ec5a27f9c93b5d4 result, different first party: bd0a4b48672515d92dc66fac0bbd40e461b6cfdd74b3a02839ef9187234b845b, cdbc1bf5c8130bedcdd1c66267c7d53854f4fe55810d28612ff1ab0e20ea39de, 3cf7999f87c215f3096bbac1ecf22276e53160fef96f6281382462d3bd766a05, bb6536cd963476f9c6f9e847e7c667b09edeacc61575a5b7ab3fb1075ce0e60c unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: 2b1b33f74ec2801b334d5dd17756126411bda4eb50609a43afe8480c4dc03f24, c1467e3882a7b8460572d2fb2f17ba8de7c1c3ee7f4053d6b3ef7068a4e17692, 29b77e2fdae197ed7a640e38cc0790f3b64fb6c1c66ac970878a6464521ed7db, eb2c770112b613fb12195a3c0905f538845be4ad4d636b2db34054f24b0ba32e, 45d01979aaf3ce3ec11d5f6a3c10a8995115e56e7e99ca8a96cfe496c894cdbe result, different first party: 3ca67d17af7fc10dd1f0cd0b946e785b8f9cf021efcacc613d449519b5d64122, 353a1f5a0e41e538ef9e1016c671ee969c475e0d7ddd313fce5726d59d7bf1bb, 7f8b4da671dc1a57ddb6b190ec46da382da36dfbc1cbf029c980d61bed980f2e, b213e7d2e6c5c556fd67f32b8760a48d5a7cd7efaf4534d74bd229002bf281e8, 62d9e35698a873fd6c13026a0c720e1481888478cc9f6da6d3f9b84dd25f8670 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: c7f255f52a060f171971732a75073d686e42ac7477943752c26d5a501f1c2511, 117217d091cfa0773044acf1ebfc729cd48739ef515dddaa3ee192e5f360f09f, 6b64fcd5ef352a2a0874b13692e25ec429bf82f152ec2f8f1ebc8bc1528553c3, b9068ed34ed3e2c0d4559a0842b0cf0629b0538f0b2e1d48666accd3227f78ad, d26607cd205ef33f9fc4f87d32bb04b789a2316bbe7362a5589f879c429a35cc result, different first party: 66a38c86ae3674ba491fb407be744a8f6681e8ac678c839179a654c17894a075, f16308501e599298b8c0ff8c4c9e6338dae498d83c8a86493a312ea00bbbb336, b22af8272e41cea882dd4a2649398b5cc04ef8ec907bc8cacebafe511e650b6f, 774a24c13b4c457284d505a9a8170dff48b30409bdba0cf0942776a122151929, b57dca72ce14b5449f3a80b5104280b24a02ce902f159de0f54ad254faa47a6a 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: e1b35114299b7a10b61fb6f078c7adc1df5f9fb7a7acece3a3cba37dd566b84d, 8974208e3bd8ae9f0aee7ebcd98ee716840eccd79bda648431ba256b78d0088c, 7fd10a9439ddee4f2cb123f1a2608ef1fd45fdcf8525ebb7d909a3067fcff611, ae86906550f5453360464794285ae5acb0db4a102fe49bfcbbd35f7ea5ff7851, 8cd15d3231f5fbf8be19ad6f7686f9e812f462590f260cf6c1ac0ce9f081c62f result, different first party: 9b75e21649ab66b823273b8c826e7fa11132d577368b457c202b56403fd48329, 9057edb3481821534c56296b795b9a05b6a5abb7046273bb58dc392be04535ca, 74b4ee7aa3344fc484238c9b922295e23ba0a0ea403d5860b486a2b3ee3f3725, e11bec19ba6d5b66e7d8ce39ea2fddb951cb83b8713f61aa402b80b3c81bd030, f2c1a941aa622a062cbd7ef4b0d600825803e34f9dc63b6c4836c220786a4629 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: 9fcc8af0f8d1488357b5d6f60d72daaca5662c07cb2f36bf1222322c54826dc9, 6d205967f20a31b3de5d916737cbfce40c8ccd8527bf07d2f1784ea7131bd4c0, 5fe3c671f47c4997ccaddd3294fb8069f9dc996e6195099b180229264379e222, 216375cedf1e98ba9153edc8f15a6bb30ed3f4ca3a3864dae5e942845ad668ea, d790a168e3d2f5ac52ca15069244e7e62d0380a6f5ca601fec6fe6ce1574e5ee result, different first party: b09b519812b17002da6c99621c05537e03e3ee11bd991dcd303ec5d9185bb497, 2bde5e8de73b4911a70e51d2b253ba5b32822597c43e13e5a6eedd0104f97789, dd53dba369c295fe2e7a94272e77e1e9866489e1dc9ea80f72765719b45d3c93, c9e22d57af6044eea4b9b5118b0b607ea71a266797bee937eea7875032c405c0, cf254fdafd42e9dea928be4958cd378890bc64decf1c3c0d0902322f478d2e26 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: a637ff1b8a3664b250aba7f15033c44aa4512f2d2246f5d7b19bdce76b3b0310, f318fcbceed3015f2f3b02434838a710d7d1fbfa6c309d3c1bb02a868d4671d5, 466d7a6bd07a84de322581d9fd0868ec6b69f25046095b4a5869fb5476defb5f, b0191248e1ca6eda88ef8cee59a622250251c7cec08ae76bc70b3a48a188ec6b, 3deeb4a3558ddf4562beba263b088b1ecee8ca55e6a8a55383ea03d3a0f3bed1 result, different first party: bc5188239a74839bca4299162566e38dd724a91f95e9a7cf35ccda55f6ba2a01, a29d0566abf73ef14d5e39da5afd3cc91dad4aaeb2e4ed57deecc0733b9d94f9, 5fca67360ea08d8ec4f5ced27e52db0bddef02eb43a9ba45b437ddc68ab428b7, 38f6fa721edffa4f12b74af8ddd9df3abd3324459f0e9fccce362716dfa3457a, 0c02e4b9d11368fefd802f6b59449e6b55be1647dcf4bdffdb5d020094d191d6 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: f73c986c989bd90a80cf3288ab76d4306e58d092bf74d42ec99963e7fbbe6540, 199b8d1c53d1d723709325ba77fc563824d387c553a615ca3da45eb836e45db4, 5aa6289ccda6d4eb3a6aa2ce7fd09bdc3293f46aa44ae79d8658708d11b85366, 42e87516bbe7f859be30f731e0a63713498c7ba08f0ad06669d046a67079c9c0, 002686369ccae47220cad7498ddb158deab9c3ba741ad46e700530e9dcb67b01 result, different first party: 43ee9a33044f8407595c3325284cd129b3b5f4547fe2f5cbf0373b1999fe36b3, 8c31d416d203b669573cbae67f93a7cc35cb0e2eb07ef27e37de4228d42c63e9, c9376668825ebe871b91420a785bfb01fb432842a3b90eedcdbccaec8d204d13, 4a06002768cae069d1e67df61958dba4ce2a3a78198c7cfaf2f38a5f7ddc7a13, 90b1ec4d205b215712570b8f14f51fb5ca1a4319516430c40aadf8673f52b0e3 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: cc3e3a6c8c2280083ee3651236fbc33501e9b058481f52af0dae3c3ebfc81083, ecb450ed0bf19815285501f965a400f34845040ae8e2a3c487917f34130ae7d4, 0511184111ae46f326a81108a77a111a2763db0fd9dc1c2d1432928e59e5a932, 6ecedfd4bf1ebdf566a282d2ff853d08a3bde9e94f8716fc287881241cc9b2ba, 96da78273d92d1d2b122d55edc615b3c1a0ec217b1acbcbdf7c29c71efc797d0 result, different first party: 6cd5d85f5574bae811e2d878cadbc4009a1c3985a611836b19ab96a4aa39b74e, 24ad46aa920cb87e8309d0a22ad7488ec4afe1484ec5db5b253e75cba31da2b0, fb3ad2a2a125ad28a589fbbc95e59e15fb0408bd4fdd92486dc6905120014e7f, 324ac1a42394a71ee2438d31aab799c8d58c1b0eb42e773a4f1b11af489494e6, 8f1fc4abc2b2384252ca61d87f60d9d3b7bbe4dc7bac4004dffdf3ddd8a6ede6 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: 4bebd6619a4363120638fbfab62cfe3bd1635b48a46a8f06fd9bbdfd157b4268, 862a4a9152563a68c3c25674f013059bb1c031a69b11476928a09cd70714427d, 28ab9bedc9be67e43af9cc095d9db80e2d7612e8e1380524833f4dad6e5f22cc, ca24323fa4f63c215aaf12e14d7397b049bd25f7740d3fcf416bdde8f5707b63 result, different first party: c51e702622fb55e18acd88fc5119ed04aacd70d7d47f382ae6d72478853afb2d, 2c90bf93aa0f6c203b80d7103e9100a8e9fa35dc4bb86a29d12beed569e4e9bb, d6b3600e678d841ef5a36ce4987ea0ac22308135ae871c58e2dbf7a0adafa0cc, c04ff4275faa6b8ebf72c8779a4d056cdfad1e831d207c048582249bebfde7b2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.privacytests2.org:8900/"); return (await results.json()).sessionId; } result, same first party: 15c218a6adb755a8ecacb8e629b58b0d7d2ce7ce84efc21fa904024411f1a7dd, bad78b0c5fe57d09a1f3a961225133808869c9d1ad0239ae90897baff8d99eff, f9b032a3611b3360675612ac68358aaca0b0e410fa026c8e69021e8ccbf0327c, 522de773224b91b63feb943d556bbc81503e2a98a366c30313e1905c7d414340, d6470f657d38415f14b599c722af9572b9a05ba0bf0726b6863f5d3c64cbc3ba result, different first party: 49a7735cab5d9dfcc95211b976ae49dfe5a4545c6b966c6c05c4930e4de9d3da, d2f10b16db5baabe4c2086ecdb3ce867fa15c06c23e7f4834d4807ce80fe97bc, 1ccc90c8710af9d6f5850ab2630d4c58d588a60a573b460e6e805f45feb3df43, f011d7d8b44ae7233475cb306b94838b453a1341d5c029eea28676ef786c333d, 98fb3cb0c817a3db9f79943cc48d496195cffcfb4aa667867aa6e12519447f26 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: 5cc1acd5759cbf1904e051ca78d580a98f86d9283689e843a4a6b5e72d4f031f, 55fbbb422a1c91a0e1154e6dbca522e9cedbf08640f8bf17f60c921c836ac27a, 9bc78472c3ed8c707ea6ade9de6bdce5060aa263b6ed0fa9580e2eb3253119c3, e30879a422b7630e0b0234cba789965a1d3ecce01dea0102ac47bda1d17952dc, 4a32d9fb2f3e866ff9faeafb50f672ceeb5816bd2f7c328f7562e1a37273a76b result, different first party: ff3991609b591345bdedf4470d8522374b4cff557d1489949715a1f845147791, dc45b5cbec20f2d7a9fbf6354f9bab47b18cc031e09f7679b159e3fbbced9455, dff456fb1767ea5ec9c2f016528b84b52d14be216459098bb8c94b8d01bc8165, aa28848cd71b7b30158a6124ccbc12f63917d52b4b1b94d6b5df524b8020de9f, 9ac7e331e958b921090edd09c640b9d7a1bb9b48855d0df8fd0fabc757e81909 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
Web SQL DatabaseThe 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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e 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: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 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. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same 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: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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: 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: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 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 result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false passed: undefined test failed: true, true, true, true
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 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 cacheSimilar 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
Navigation tests Which browsers allow websites to share 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.referrerThe 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: , , , , 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/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, 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/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer result, same first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ result, different first party: https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/, https://test-pages.privacytests2.org/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
sessionStorageThe 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: 17a7b026-3643-44c2-a45b-496b4e6d5192, 4210b46e-c1a4-42e9-812f-cd79c2ae36dd, 97ee105e-97ea-4ffb-b5be-50d750ab3f79, 0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, 503a6dc9-c3c6-48c8-b671-de81fd753a1a 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: 0bc23788-bb00-4e32-b89c-ed85be80b3e0, b09f8430-e2ce-4712-8d42-00f05ffa41d2, b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, 211d1e17-ba5b-4478-a95f-5543b81a223e, 35eb5b30-4084-4cbe-9b7e-41948089ef7e result, different first party: Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document. 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: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: 92802a1f-132f-4f55-ae75-728df82a29f5, b937fbe6-7592-41b7-8579-8291fe0032ee, 63d9cd59-5af1-445b-bc29-8d54a8511879, 3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: 7006064e-d01e-40c1-9f2d-d0a85f75729f, 794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, 11fcecb2-9fbf-4999-a684-354223d8b12a, b39b54fb-e464-47e5-b015-1253fea8479b, ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 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: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: aba9ceec-e3ec-4866-adae-8c9fa3893bea, 6d5c9411-112b-4b7c-a23f-359850b08c31, 4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, 488523c7-f9f5-430a-93c5-94af61b7326b, 3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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: 227ecd88-f7ac-4581-8a80-7aa2e8de4350, 26eafb85-05a9-42bc-8444-827de1105a74, f0c25ecf-18e7-47cb-b202-596060f155e4, 2ecc070d-f234-4b74-b108-be4e1cab156f, c51ff024-96c6-4e28-ae4c-6682b681f780 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: b010e5ab-c60e-408e-9f27-03ad66a68353, aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, f095bd48-e900-4bd3-a67a-f321d3f75045, 0961a784-5278-469e-9a24-7b4db87e0f0d, f067b242-2519-4d5c-b682-822db01ac47a 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: 9ce28136-8b23-4f9b-94ca-bb96374a073f, 73a74fde-44c3-4fc8-a73a-15b8034fa51e, 3f270ae1-77f2-4528-89be-9f10daf3bba0, 17475059-809c-4dc0-a45a-e6c5a638599b, f1f88358-aabe-41e5-a4c9-f294ce50ea7a 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: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: f6d98ff4-71ba-4593-ab0c-2caa50f73d85, 68d1f735-8916-4af3-b800-643811bd59d1, fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, 29dde574-76ac-4d4c-95f9-b3fd6a755933, ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 result, different first party: b236c548-4f26-4b77-b272-59c06ca834fb, 8adab197-940d-4cf5-8cf2-ca440923595b, 38271ad0-7092-4d63-a5e2-8d2679d1ad65, 2838059e-52e8-481c-8f9f-6ae1c38fae81, b40cd9af-318d-4d4b-ab1c-d54361b76207 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: bca0f488-3f39-4679-8796-e40748013457, e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, 7969aee9-9abc-4736-84c1-d20adfabb63d, 65348339-cf6f-4a97-af61-f39841da933d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: 7158c5ae-f315-473e-8da8-479cf8cfef28, 2d8d6fa7-eaad-446b-ba8d-919240db3d9b, 7b9a6639-f84c-4cea-8821-51b029bb00c2, 9f79f839-8dc5-4529-bd68-74d081f4e833, 13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: e10b2895-c782-4e2d-9cbf-29d926f92960, c9d7a89d-25b6-4d14-af67-b7c88e669eed, c80130bd-bee6-4335-9a8b-4506ddeba85e, 98c89a32-9f55-414b-aec5-552ac7b31bf8, e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
window.nameThe 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_17a7b026-3643-44c2-a45b-496b4e6d5192, name_4210b46e-c1a4-42e9-812f-cd79c2ae36dd, name_97ee105e-97ea-4ffb-b5be-50d750ab3f79, name_0a2c91e6-9d33-4bc6-bb2c-98a63fd855ef, name_503a6dc9-c3c6-48c8-b671-de81fd753a1a 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_0bc23788-bb00-4e32-b89c-ed85be80b3e0, name_b09f8430-e2ce-4712-8d42-00f05ffa41d2, name_b4bbf9a1-bcdf-45ce-80bd-600b6fda5169, name_211d1e17-ba5b-4478-a95f-5543b81a223e, name_35eb5b30-4084-4cbe-9b7e-41948089ef7e 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_92802a1f-132f-4f55-ae75-728df82a29f5, name_b937fbe6-7592-41b7-8579-8291fe0032ee, name_63d9cd59-5af1-445b-bc29-8d54a8511879, name_3da42a7d-d131-4647-b3bc-88728d243106 result, different first party: name_92802a1f-132f-4f55-ae75-728df82a29f5, name_b937fbe6-7592-41b7-8579-8291fe0032ee, name_63d9cd59-5af1-445b-bc29-8d54a8511879, name_3da42a7d-d131-4647-b3bc-88728d243106 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_7006064e-d01e-40c1-9f2d-d0a85f75729f, name_794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, name_11fcecb2-9fbf-4999-a684-354223d8b12a, name_b39b54fb-e464-47e5-b015-1253fea8479b, name_ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 result, different first party: name_7006064e-d01e-40c1-9f2d-d0a85f75729f, name_794ec6e2-6ec5-43cc-ac7c-fae4852c0bd4, name_11fcecb2-9fbf-4999-a684-354223d8b12a, name_b39b54fb-e464-47e5-b015-1253fea8479b, name_ae6f4ff1-5ea9-4a39-b97b-ab67c01f0529 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_aba9ceec-e3ec-4866-adae-8c9fa3893bea, name_6d5c9411-112b-4b7c-a23f-359850b08c31, name_4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, name_488523c7-f9f5-430a-93c5-94af61b7326b, name_3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 result, different first party: name_aba9ceec-e3ec-4866-adae-8c9fa3893bea, name_6d5c9411-112b-4b7c-a23f-359850b08c31, name_4245d20d-19b6-4d46-b8e2-9cdee5fb0bb3, name_488523c7-f9f5-430a-93c5-94af61b7326b, name_3eca1a09-4aaa-4487-90e7-a89bdbe4d5e4 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_227ecd88-f7ac-4581-8a80-7aa2e8de4350, name_26eafb85-05a9-42bc-8444-827de1105a74, name_f0c25ecf-18e7-47cb-b202-596060f155e4, name_2ecc070d-f234-4b74-b108-be4e1cab156f, name_c51ff024-96c6-4e28-ae4c-6682b681f780 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_b010e5ab-c60e-408e-9f27-03ad66a68353, name_aadd1d44-21cb-4d98-9681-1cc2cbc9f5a9, name_f095bd48-e900-4bd3-a67a-f321d3f75045, name_0961a784-5278-469e-9a24-7b4db87e0f0d, name_f067b242-2519-4d5c-b682-822db01ac47a 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_9ce28136-8b23-4f9b-94ca-bb96374a073f, name_73a74fde-44c3-4fc8-a73a-15b8034fa51e, name_3f270ae1-77f2-4528-89be-9f10daf3bba0, name_17475059-809c-4dc0-a45a-e6c5a638599b, name_f1f88358-aabe-41e5-a4c9-f294ce50ea7a 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_f6d98ff4-71ba-4593-ab0c-2caa50f73d85, name_68d1f735-8916-4af3-b800-643811bd59d1, name_fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, name_29dde574-76ac-4d4c-95f9-b3fd6a755933, name_ad3ff89e-dad9-4db2-917d-06638aaaa9d3 result, different first party: name_f6d98ff4-71ba-4593-ab0c-2caa50f73d85, name_68d1f735-8916-4af3-b800-643811bd59d1, name_fefd2560-1c2b-497c-9fbf-6a8ae6b7c39e, name_29dde574-76ac-4d4c-95f9-b3fd6a755933, name_ad3ff89e-dad9-4db2-917d-06638aaaa9d3 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_b236c548-4f26-4b77-b272-59c06ca834fb, name_8adab197-940d-4cf5-8cf2-ca440923595b, name_38271ad0-7092-4d63-a5e2-8d2679d1ad65, name_2838059e-52e8-481c-8f9f-6ae1c38fae81, name_b40cd9af-318d-4d4b-ab1c-d54361b76207 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_bca0f488-3f39-4679-8796-e40748013457, name_e7f2cfcf-f0a9-4ea2-8028-44f52273f6dd, name_7969aee9-9abc-4736-84c1-d20adfabb63d, name_65348339-cf6f-4a97-af61-f39841da933d result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_7158c5ae-f315-473e-8da8-479cf8cfef28, name_2d8d6fa7-eaad-446b-ba8d-919240db3d9b, name_7b9a6639-f84c-4cea-8821-51b029bb00c2, name_9f79f839-8dc5-4529-bd68-74d081f4e833, name_13cbf903-766a-4ee2-bd86-dd6c51b5d3fb result, different first party: name_7158c5ae-f315-473e-8da8-479cf8cfef28, name_2d8d6fa7-eaad-446b-ba8d-919240db3d9b, name_7b9a6639-f84c-4cea-8821-51b029bb00c2, name_9f79f839-8dc5-4529-bd68-74d081f4e833, name_13cbf903-766a-4ee2-bd86-dd6c51b5d3fb 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_e10b2895-c782-4e2d-9cbf-29d926f92960, name_c9d7a89d-25b6-4d14-af67-b7c88e669eed, name_c80130bd-bee6-4335-9a8b-4506ddeba85e, name_98c89a32-9f55-414b-aec5-552ac7b31bf8, name_e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 result, different first party: name_e10b2895-c782-4e2d-9cbf-29d926f92960, name_c9d7a89d-25b6-4d14-af67-b7c88e669eed, name_c80130bd-bee6-4335-9a8b-4506ddeba85e, name_98c89a32-9f55-414b-aec5-552ac7b31bf8, name_e6afdda0-6cd2-49da-adf3-35ed8f91d5e3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
HTTPS tests Which browsers use encrypted network connections whenever possible?
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 websiteChecks 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 result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,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 result: 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 addressChecks to see if an insecure address entered into the browser's address bar is upgraded to HTTPS whenever possible.
  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 passed: 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: 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 passed: 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 hyperlinkChecks 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: 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 passed: 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: 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 passed: 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 imageChecks to see if the browser attempts to upgrade an insecure address for an image to HTTPS whenever possible.
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true result: 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 result: 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 scriptChecks 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 result: 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 result: 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 tests Which browsers provide additional assorted privacy protections?
This category includes tests for the presence of miscellaneous privacy features
GPC enabled first-partyThe Global Privacy Control is an HTTP header that can be sent by a browser to instruct a website not to sell the user's personal data to third parties. This test checks to see if the GPC header is sent by default to the top-level website.
  header value: 1 passed: true,true,true,true,true
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false
  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
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
GPC enabled third-partyThe 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
  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
  passed: false,false,false,false,false
  passed: false,false,false,false,false
IP address leakIP 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
  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
  passed: false,false,false,false,false
  passed: false,false,false,false,false
Stream isolationBrowsers 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 readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: 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 readSameFirstParty: 2a0b:f4c2:2::57,2a0b:f4c2:2::46,2a01:367:c1f2::189,45.9.148.209 readDifferentFirstParty: 2a0b:f4c2::10,2001:67c:6ec:203:192:42:116:186,2a03:4000:6:1007:861:79ff:feb7:a4d4,95.214.55.43 passed: true,true,true,true testFailed: false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
Tor enabledThe 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 passed: false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: 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 passed: 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 tests Which 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 heightHeight 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 desired value: undefined passed: 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
  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 widthWidth 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 desired value: undefined passed: 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 desired value: undefined passed: 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
outerHeightHeight of the browser window in pixels, including browser chrome.
  expression: outerHeight desired expression: undefined actual value: 464,464,464,464,464 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 desired value: undefined passed: 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: 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: 512,512,512,512,512 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 desired value: undefined passed: 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.heightHeight 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 desired value: undefined passed: 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 desired value: undefined passed: 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.widthWidth 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 desired value: undefined passed: 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 desired value: undefined passed: 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
screenXPosition, 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 desired value: undefined passed: true,true,true,true
  expression: screenX desired expression: undefined actual value: 0,0,0,0,0 desired value: undefined passed: true,true,true,true,true
  expression: screenX desired expression: undefined actual value: 0,0,0,0,0 desired value: undefined passed: true,true,true,true,true
  expression: screenX desired expression: undefined actual value: 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 desired value: undefined passed: true,true,true,true
  expression: screenX desired expression: undefined actual value: 0,0,0,0,0 desired value: undefined passed: true,true,true,true,true
  expression: screenX desired expression: undefined actual value: 0,0,0,0,0 desired value: undefined passed: true,true,true,true,true
screenYPosition, 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 desired value: undefined passed: 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 desired value: undefined passed: 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 tests Which 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.)`
__hsfpHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
__hsscHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
__hstcHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
__sDrip.com email address tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
_hsencHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
_openstatYandex tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
dclidDoubleClick Click ID (Google)
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
fbclidFacebook Click Identifier
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
gclidGoogle Click Identifier
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
hsCtaTrackingHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
igshidInstagram tracking parameter
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
mc_eidMailchimp Email ID (email recipient's address)
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
mkt_tokAdobe Marketo tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
ml_subscriberMailerLite email tracking
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
ml_subscriber_hashMailerLite email tracking
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
msclkidMicrosoft Click ID
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
oly_anon_idOmeda marketing 'anonymous' customer id
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
oly_enc_idOmeda marketing 'known' customer id
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
rb_clickidUnknown high-entropy tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
s_cidAdobe Site Catalyst tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
vero_convVero tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
vero_idVero tracking parameter
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
wickedidWicked Reports e-commerce tracking
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
yclidYandex Click ID
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
  value: 6229486818018433 passed: false,false,false,false,false
Tracker content blocking tests Which 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.`
AdobeTests 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: true,true,true,true,true
  url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false
  url: https://munchkin.marketo.net/munchkin.js passed: true,true,true,true,true
  url: https://munchkin.marketo.net/munchkin.js passed: 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
  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 ManagerTests 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: true,true,true,true,true
  url: https://dpm.demdex.net/ibs passed: false,false,false,false
  url: https://dpm.demdex.net/ibs passed: true,true,true,true,true
  url: https://dpm.demdex.net/ibs passed: 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
  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 adsystemTests 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: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: 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
  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
AppNexusTests 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: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: 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
  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 AdsTests 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: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: false,false,false,false
  url: https://bat.bing.com/bat.js passed: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: 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
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
ChartbeatTests 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: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: 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
  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
CriteoTests 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: true,true,true,true,true
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,true,true,true,true
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: 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
  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: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: 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
  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 trackingTests 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: true,true,true,true,true
  url: https://connect.facebook.net/en_US/fbevents.js passed: false,false,false,false
  url: https://connect.facebook.net/en_US/fbevents.js passed: true,true,true,true,true
  url: https://connect.facebook.net/en_US/fbevents.js passed: 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
  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: true,true,true,true,true
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: true,true,true,true,true
  url: https://www.google.com/pagead/1p-user-list/ passed: 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
  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 AnalyticsTests 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: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: false,false,false,false
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: 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
  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 ManagerTests 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: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: 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
  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 ExchangeTests 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: 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
  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
  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 RelicTests 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: true,true,true,true,true
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: 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
  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,true
QuantcastTests 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: true,true,true,true,true
  url: https://pixel.quantserve.com/pixel passed: false,false,false,false
  url: https://pixel.quantserve.com/pixel passed: true,true,true,true,true
  url: https://pixel.quantserve.com/pixel passed: 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
  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 BeaconTests 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: true,true,true,true,true
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: 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
  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
TaboolaTests 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: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: 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
  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 pixelTests 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: true,true,true,true,true
  url: https://t.co/i/adsct passed: false,false,false,false
  url: https://t.co/i/adsct passed: true,true,true,true,true
  url: https://t.co/i/adsct passed: 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: true,true,true,true,true
  url: https://t.co/i/adsct passed: 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 AdsTests 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: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: 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
  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