Android Browsers

(default settings)

brave
1.52

chrome
114.0

duckduckgo
5.164

edge
114.0

firefox
115.2

focus
115.2

mull
113.0

opera
76.2

samsung
22.0

tor
102.2

vivaldi
6.1

yandex
23.7
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 = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3 result, different first party: h2, h2, h2, h2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3 result, different first party: h3, h3, h3, h3 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3 result, different first party: h2, h2, h2, h2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/clear"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache for (let i = 0; i < 3; ++i) { await fetch(altSvcOrigin + "/set"); await sleepMs(100); } responseText = await fetchText(altSvcOrigin + "/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText(altSvcOrigin + "/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 result, different first party: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a result, different first party: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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: 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: 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd result, different first party: 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd, 1a58b228-dfad-4c1f-b426-eb4a81d4cefd 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: fbc6d935-b09f-4ada-a216-2a8a757cf8e8, fbc6d935-b09f-4ada-a216-2a8a757cf8e8, fbc6d935-b09f-4ada-a216-2a8a757cf8e8, fbc6d935-b09f-4ada-a216-2a8a757cf8e8, fbc6d935-b09f-4ada-a216-2a8a757cf8e8 result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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 result, different first party: 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 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b result, different first party: 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b, 7dea6a2a-507d-46b5-aba8-c25eddf75e0b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e result, different first party: 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e, 5f3dcdb9-84d1-42c2-a6b6-cc2e0e17665e unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 761073ae-020f-499f-af87-8fb29196841a_http, ac43c278-3a30-4912-9c0f-5243a474c8ed_http, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9_http, a84fe0c1-0a24-4dff-899a-9f4e6f642a87_http, 78ad69c9-a78a-47d4-898b-6fa82aca6139_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6_http, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353_http, 4ac9b8de-acc7-419d-82f3-3135e216d810_http, df8e499f-6755-4b2e-833f-6b68f18f1ac9_http result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6_http, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353_http, 4ac9b8de-acc7-419d-82f3-3135e216d810_http, df8e499f-6755-4b2e-833f-6b68f18f1ac9_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 992079a3-09b0-4041-9ebf-92360ba95603_http, 81a2a622-6a87-424a-8f80-bfb75b674de2_http, 42a450d7-33a4-4893-8c6f-d0e820f6841a_http, 61286460-f301-4333-8851-cd43b3bb11b5_http, ace9b83b-ece9-4865-985e-3650d0c42c8e_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023_http, 0cf28453-e38b-4522-9bc0-383e17d3303e_http, 5fe069df-1083-4f76-b85f-55afe892be55_http, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277_http, b2596ae0-7480-4095-adbb-8740ea50d905_http result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023_http, 0cf28453-e38b-4522-9bc0-383e17d3303e_http, 5fe069df-1083-4f76-b85f-55afe892be55_http, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277_http, b2596ae0-7480-4095-adbb-8740ea50d905_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc_http, cf03aced-9858-4f50-af7e-1d72eb585f23_http, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e_http, 367acb12-05bb-4ad5-b263-2bc1d80053f1_http, 244d7dd7-b001-4cf3-8421-239e90a0a885_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1_http, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2_http, a78607a1-c06c-48ae-8aaa-b925b51dcb79_http, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8_http, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: c2d73463-1230-42d7-b93b-aa571f668b8a_http, 2b918bc2-1e15-4892-969f-1db91eb8a7c7_http, e89eb5be-23d3-4992-abe9-4b480892022b_http, 1d0ba822-4ecf-4190-8372-bab9527e555d_http, 3de03f43-288c-4f34-bd9b-d5f90c44db88_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 477f1d21-0432-4fdf-952c-0399c8cc796b_http, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0_http, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f_http, b0b19fc3-4730-4376-bd51-9d2f337d64d2_http result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b_http, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0_http, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f_http, b0b19fc3-4730-4376-bd51-9d2f337d64d2_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 742285d0-b634-4662-9ce5-1325d5c255a1_http, 8a74b705-0b17-4486-908b-eb10f41db9ad_http, 125faaeb-8307-4b7a-a3c0-a3171c246401_http, 731edf28-16d8-4b3f-b1be-233d36fcedd5_http, e1820bbb-62ad-48b0-841d-3d3c84ea73f1_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 674f237c-095f-45dd-a484-f81b702e555f_http, 1bef202e-e961-4e68-9295-d56a4c94c5eb_http, 2208fbd7-844e-4628-8acd-62777242944f_http, a4f73dc3-89cc-415f-b629-4c5e910aafca_http, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f_http, ce588a80-18c3-4aa7-8016-3058e33aadfc_http, 92bc68ea-2342-4eb9-be1a-485ec554528c_http, 5ea3fb62-b54a-48e3-bdce-34cd138e561b_http result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f_http, ce588a80-18c3-4aa7-8016-3058e33aadfc_http, 92bc68ea-2342-4eb9-be1a-485ec554528c_http, 5ea3fb62-b54a-48e3-bdce-34cd138e561b_http unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: a305d4f8-2446-4508-bd6b-7d35aacdc80c_http, d499b237-714a-4f4b-a761-39b37bac903f_http, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0_http, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92_http, 89b14e82-8df7-46c6-b55c-8164c729f99e_http result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c_http, d499b237-714a-4f4b-a761-39b37bac903f_http, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0_http, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92_http, 89b14e82-8df7-46c6-b55c-8164c729f99e_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
cookie (JS)The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them.
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 761073ae-020f-499f-af87-8fb29196841a_js, ac43c278-3a30-4912-9c0f-5243a474c8ed_js, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9_js, a84fe0c1-0a24-4dff-899a-9f4e6f642a87_js, 78ad69c9-a78a-47d4-898b-6fa82aca6139_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6_js, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353_js, 4ac9b8de-acc7-419d-82f3-3135e216d810_js, df8e499f-6755-4b2e-833f-6b68f18f1ac9_js result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6_js, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353_js, 4ac9b8de-acc7-419d-82f3-3135e216d810_js, df8e499f-6755-4b2e-833f-6b68f18f1ac9_js unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 992079a3-09b0-4041-9ebf-92360ba95603_js, 81a2a622-6a87-424a-8f80-bfb75b674de2_js, 42a450d7-33a4-4893-8c6f-d0e820f6841a_js, 61286460-f301-4333-8851-cd43b3bb11b5_js, ace9b83b-ece9-4865-985e-3650d0c42c8e_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023_js, 0cf28453-e38b-4522-9bc0-383e17d3303e_js, 5fe069df-1083-4f76-b85f-55afe892be55_js, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277_js, b2596ae0-7480-4095-adbb-8740ea50d905_js result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023_js, 0cf28453-e38b-4522-9bc0-383e17d3303e_js, 5fe069df-1083-4f76-b85f-55afe892be55_js, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277_js, b2596ae0-7480-4095-adbb-8740ea50d905_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc_js, cf03aced-9858-4f50-af7e-1d72eb585f23_js, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e_js, 367acb12-05bb-4ad5-b263-2bc1d80053f1_js, 244d7dd7-b001-4cf3-8421-239e90a0a885_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1_js, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2_js, a78607a1-c06c-48ae-8aaa-b925b51dcb79_js, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8_js, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: c2d73463-1230-42d7-b93b-aa571f668b8a_js, 2b918bc2-1e15-4892-969f-1db91eb8a7c7_js, e89eb5be-23d3-4992-abe9-4b480892022b_js, 1d0ba822-4ecf-4190-8372-bab9527e555d_js, 3de03f43-288c-4f34-bd9b-d5f90c44db88_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 477f1d21-0432-4fdf-952c-0399c8cc796b_js, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0_js, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f_js, b0b19fc3-4730-4376-bd51-9d2f337d64d2_js result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b_js, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0_js, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f_js, b0b19fc3-4730-4376-bd51-9d2f337d64d2_js unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 742285d0-b634-4662-9ce5-1325d5c255a1_js, 8a74b705-0b17-4486-908b-eb10f41db9ad_js, 125faaeb-8307-4b7a-a3c0-a3171c246401_js, 731edf28-16d8-4b3f-b1be-233d36fcedd5_js, e1820bbb-62ad-48b0-841d-3d3c84ea73f1_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 674f237c-095f-45dd-a484-f81b702e555f_js, 1bef202e-e961-4e68-9295-d56a4c94c5eb_js, 2208fbd7-844e-4628-8acd-62777242944f_js, a4f73dc3-89cc-415f-b629-4c5e910aafca_js, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f_js, ce588a80-18c3-4aa7-8016-3058e33aadfc_js, 92bc68ea-2342-4eb9-be1a-485ec554528c_js, 5ea3fb62-b54a-48e3-bdce-34cd138e561b_js result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f_js, ce588a80-18c3-4aa7-8016-3058e33aadfc_js, 92bc68ea-2342-4eb9-be1a-485ec554528c_js, 5ea3fb62-b54a-48e3-bdce-34cd138e561b_js unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c_js, d499b237-714a-4f4b-a761-39b37bac903f_js, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0_js, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92_js, 89b14e82-8df7-46c6-b55c-8164c729f99e_js result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c_js, d499b237-714a-4f4b-a761-39b37bac903f_js, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0_js, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92_js, 89b14e82-8df7-46c6-b55c-8164c729f99e_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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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_5117230373558754, fake_7581833242067237, fake_9682829476487844, fake_8866118633980073, fake_8483975004094477 result, different first party: fake_6853294901649578, fake_3702121209720648, fake_32068757065272413, fake_9608886164922055, fake_39695303468817333 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_5674419765597309, fake_18305078391024798, fake_9572231076900488, fake_8461067942056435 result, different first party: fake_5674419765597309, fake_5883497838153937, fake_9181980479404863, fake_31070137589905 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_9872997428764216, fake_777216289613524, fake_5172863347700034, fake_6258030062346152, fake_19001167298903443 result, different first party: fake_9872997428764216, fake_777216289613524, fake_5172863347700034, fake_6258030062346152, fake_19001167298903443 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_5912228201794878, fake_5482947610904711, fake_4940979874566631, fake_3120011336064934, fake_106838855455339 result, different first party: fake_9312363796334662, fake_5090002740031818, fake_7004574040040357, fake_9576665440938699, fake_356708458890461 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_423516094076442, fake_2522746344025284, fake_6570668961073751, fake_022025503564451654, fake_5147811063745855 result, different first party: fake_5397167331512498, fake_5812914458464362, fake_40564182936460624, fake_7443343527178741, fake_3660604873918023 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_16370115413393416, fake_3630175035001115, fake_4048020431306516, fake_9916446539354355, fake_47914512680970067 result, different first party: fake_3669279805255721, fake_50178471595724, fake_04806793304864221, fake_3889194879462068, fake_6063226145497855 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_7423782366829643, fake_17414385702926793, fake_9588471332922035, fake_3296955621194737, fake_49331382664266865 result, different first party: fake_30577054077903654, fake_8705762931533143, fake_7636522489932884, fake_6515521844141907, fake_7879991798263533 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_6883793627180235, fake_6397162804029493, fake_1971788613478458, fake_46679447611637803 result, different first party: fake_6883793627180235, fake_6397162804029493, fake_1971788613478458, fake_46679447611637803 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_4619814577563066, fake_10405284468480613, fake_8529450295668013, fake_5974666550604137, fake_17936558335460773 result, different first party: fake_09697827785265156, fake_24279910060655707, fake_28590900502694483, fake_1143919752351259, fake_7739073701281907 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_5890483141444958, fake_44915193351563354, fake_9769217726391686, fake_4484359623861025, fake_8617086910729468 result, different first party: fake_7936884256239614, fake_3440566007953434, fake_5052972697631677, fake_18205082165178021, fake_040223851535687194 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_7530865528098512, fake_08095683245467167, fake_26682825257717835, fake_05359974005362611 result, different first party: fake_7530865528098512, fake_9684756102864986, fake_9705101914149412, fake_8580692566123498 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_4763496031041563, fake_07181790047908865, fake_1471453414123518, fake_6852570971643206, fake_6285186163490932 result, different first party: fake_7659713799205179, fake_7017966061291325, fake_419697526805054, fake_1853627699137994, fake_5571820625829889 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(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received 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: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(2000); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
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 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 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: 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: 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("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 1, 2, 2, 2 unsupported: false, false, false, false passed: false, true, true, true test failed: false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 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: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 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 style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { const text = document.createElement("span"); text.id = "text"; text.innerText = "test"; document.body.appendChild(text); const originalWidth = text.getBoundingClientRect().width; let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); let newWidth; do { await sleepMs(100); newWidth = text.getBoundingClientRect().width; } while (newWidth < 0 || newWidth === originalWidth) let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 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: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.privacytests2.org:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.privacytests2.org:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true 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: 3ab8f47f8f1ef1f97d2f15768089721d, b942c878557aefcc7a6d92e8dd5183fd, 2f58185eb06adfb24654f1d7ad1e1bad, a0b526e09c9d9f43306d5a3503b3f6e9, 80967d060a14ac973017674e72a770c5 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: dd8b9b5e94c027e11b32072e385303b7, f4645ad1e7b4660440a94b38b0575a47, b01e17d2215862409299a94590b35c91, 0a709f15d5fb18b4a76b01c578dac5e3 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 2632df906d29c0526fa84335eedee2c7, eaf26c0e6c17e1b45204cc2840eb6e86, 904ea152dbec9751b2092b930e83555e, 7c09d0c41e00a42ba05975254b172c2a, 245a356c75368de881a9f58b68dfb0dd result, different first party: 2632df906d29c0526fa84335eedee2c7, eaf26c0e6c17e1b45204cc2840eb6e86, 904ea152dbec9751b2092b930e83555e, 7c09d0c41e00a42ba05975254b172c2a, 245a356c75368de881a9f58b68dfb0dd 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: d675e12ccae465d1897452a49af2d76a, 97fda5677dbb3a4389a8892fca04ad75, 6a5c500bb9c0b1fe806c1a2f5a8c97e6, d1cd6b919c6a1a75bfb0e5d96f7d0454, a571a2f3b53a598b7f009680f63cf014 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: 6c2b4a10c38d72d92d7d335bb77bc6fa, ce903c9345d300d3d33aa561e5ee08c8, a5815fc3e45a2214460107234864bd54, 8290d208658309e3e4016134c5b450d0, 62f7f667a8744c23a6deadfc83392d7d 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: 719bcc8ddc44fafc32b29038d4fac5bb, 628a12fa191fd33faad7884ecd530321, e09cbdbeb4c7b8a53912cb911ef2e33c, f56ed1a8a34427fbba5301b6bf19f195, 03279493c2d38fb6b8ff2f249fd7149e 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: d4b71012adefd2c23ad054bafdb48036, 6e48fa015db623760008e3160eac7ca4, f0f90006da0cb5a4d7466186ffac6a47, 8095972755672a79480766bcebe9ccb8, c15421614a75a77e796509dd78a92f22 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: 5d0adaa98dbe438d59c2d8be2ab1fb7e, 248bda8515962d53469c8af828c89831, 3c51c5f5602d106d6e30a0c66fdc1cb4, 0d8f73a89e163fd68786f057912ff51a result, different first party: 5d0adaa98dbe438d59c2d8be2ab1fb7e, 248bda8515962d53469c8af828c89831, 3c51c5f5602d106d6e30a0c66fdc1cb4, 0d8f73a89e163fd68786f057912ff51a unsupported: false, false, false, false passed: false, false, false, false 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: , , , , result, different first party: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 1f2472434bf932ab514576845e022988, 85c8523ef1fbce11eda11e6febbf7ffe, 6cd6a9a3344ea99928e27828126d50c5, 1e659a43c969593daf6756d487477162 result, different first party: , 03af765136fb5510ef91fef781bf13c8, dcd37a5e643ec017e447a5a07bdf03d0, 11bfa67d86ac16b34302ef37082e98b5 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`, {cache: "no-store"}); let text = await response.text(); // Empty response text indicates we are not connecting over h3: if (text.trim() === "") { throw new Error("Unsupported"); } } read: async () => { let response = await fetch(`https://h3.privacytests2.org:4434/connection_id`); return await response.text(); } result, same first party: 7cb8d51c5e35dd0bce02e1f7ea103ca2, 30cff8595441529f4e12bfc78d2f8819, be781d9074db45cd9270e5635978fd03, 5aad325b2b6c1432a54b779beb5ac20a, 61d9a99f6d45da6e76dca4d2599ced4d result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true 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 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 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: 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 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
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 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 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) => 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: 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 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 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) => 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: 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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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., 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., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 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: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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 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 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: 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 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: 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 --> result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, , , 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 --> result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <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, 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 --> result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, , , 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
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"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined 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"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 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"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: 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"); const message = await messagePromise; if (message === "none") { throw new Error("Unsupported"); } return message; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
TLS Session 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: f275e08bc683dfd541e1819b0bbe1b35074c93db3e2a5cf9d745321343b26b2c, 8e01712002b64459681dfb3363fadee00bb7e983ca0bd905709369eaca7277ad, e848fd0dbb8fea3a04d0cc916666661cd0e2e674d27bd748166039e882d7ee7b, f3a7d6640992d066c1c1290b999225d45f3fbcccf5e6ae164d06f061bc96f733, 5678369871840cc751ae9909cff48e57e49d625e64deb905739c0616fef1211a result, different first party: e76e06f99322b69894431748b7dd0f3684e7f2df6835db9600fba2a461a926ca, a82c9bdff6a014eec6b517ed7be275d55c7e44bda0ad912ac4c0af72e7bc9d76, dcd0dbbd1d733a623dd3e6f23876b2fce83f0d699a0aa23a04f98f122fc1d740, b15bca79d28d6d6a67a5518f8a6e7047bd10c3c0956c5aebef27dd1b172e6787, 84dd176d690926b7bbefe4f4f1f88adc300ee3bee79590e82ea0ce079f00ffe3 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: 403e6f423d505b5d88eefdb6bc3d433afdf8f5a9b81de7f68d7ce9eb8b1b4015, 74a42e2045eae9a017dabc0065067e44b26211556fce830839c0e334872e1308, df4c428a720dbe531fb60be0b5a5cd84a78e8c1425e9cba896d4f14ea8bb1318, 3e6ad8a94216902adb5a2d709fbb378697ee590979c8458b8cb6ecc5f129a03c result, different first party: 3ec5551dd5eef0326fbba144c9ce5b83d285eaa0fdee7f4c2dd40591d468dd9b, 24d921f49e7e887f6ce011ccd0706a4bcc753351a029d5b3c6963243e73fa77c, 16ba7d30c81703fcdbb53e611fd96abc855c44feb0ed1fc42dcf8bc86a937034, 77ff7ccb04e231dcdbae79e267c44c0ce49f068c58370050334c09ff3e249f5a 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: 8162ed29d9e8f24c13f9f855dbf3115146e5b2b16bb7cb96bc4a99c7898f721c, 79f0d308cad5d19d66ea253bcc171f07f7b80b7a71a9effccd447f3c0c69a394, 2ee07b817a90b43106fa49171e2d932a28b2f68473760e8389359d4db2b67923, 51dd460dda0b5a8f56970636de6001cf3f406f7b0848e9e65ab2519c0c25e1fe, b3573295c4041ecd4bfa41c2efc178e944cf8d7dfedfd8d18e7e5b2b21cbae4c result, different first party: 9a67821561f07a9971a58970b0790fc371807f9149bb13304e65315e3b4e32e3, 8f7eb46f72b441608151cc658cc4f0fb20469fcc69c674c8986e75a816cef2d9, 6c922d5d43ca7f94dc4ed16158af30ebb64a34fc468d82d505bb9e301988b305, 719a659372c7d10f4af4148e4f102673b701e619ee98bb2236e3d6a538c47765, 946d0aaf8e01218955560f89c302e3b67c8430f17df5236736cb4c4c663fc88d 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: 23a2460edf9fa505f7e46011473562e2fe742a6084fbe98579e37ce9e2467a46, fefaef2b81ea08e319ccde1954ca49dafb65cf6cb8116f978df92d5bb7864cf5, 93e9b91c0eb1fc6e7fea95bb1a67a21138691c2b9f1babf85a94768decfbfd7c, e8ff4ecaec9604f1d436425395b3a644693461cd03c3443d0dc66f6fb5ef06a3, 4fc23a3c65db9f04d2959772f5ce0590d657b2de6e1704ff05ade4af1c81a499 result, different first party: 91db925dbe42249eeaca9debcb5f8c4e62c53e48f402fd20feb87544291b9cc5, 2e5afbbd2b91a8e930244d28d50ca20e631f9f3f8fef3b9d138b86f566609ab5, e57130dd39ebb1a760d55e57a57bfc162316aa7e53cdf70ac71fa1978273fbde, 2719c6afa08c7f88b70c443b4b2e546de802a64527b3e89c8be1464743642ab5, 7501bc20730c4485ab88c433ccd21bce98e58b266aeafa28854a49fbb818a0ec 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: 850dbc8101aa9d8ae559ff1f2e543e70f90d068ad297c82bfdd151a82c1d883e, f361347bc3cac63a1d451c20f46d4a6d76aa0f54ac19bb59d6c8b1250e924a8d, a2cfb69538274b0d2018ccff8b6fda23e6a196e2c60727789cf450c01898e725, 4328850eacaddbcf172b58ed4f0646c5e49c3c55a1b9861ff55c8a54c22d8d77, 04499769b77d8cc29cb70f2cdf503b9c7f47209e624a58ae6d1c1f109f114ea8 result, different first party: 7b02e306b2a6ab87eb554fd2ac331a03360309144dcc8e8cdf99d194c38d140a, 7ae37ab1e178c0630408ffd2af4141e9839dd91768617f7c21b1ac2b6f71c58b, 196fdcc6ce67ab28c5f0a2725780616e2d2bc4ae30d1f548e9e86caba2ee303e, 4df80649a51a5812a6fca7b8bba0a0ae58cc8241ffc6c9b32832610e63554891, 5dd11476afd7596aecf2f519777080e427fb001a69fccde0214117ed081c955a 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: 18fb8f9695c840d4243cd548e23214d7e41fb654b55bf90cbac3cdbc727ff39f, 429b2ef75f87f2c3ee0bee38b054748e27dfa30fae0e16dd378b0b30a6897be7, d02207de75da5aebcc44b9c3685beb7156f5f9cfb2ba41b7dc3563a63b939ab5, a6a24ef3242b6d6b9a54433a8adf073af80edb68cccb0ebe6dfe8f48c5c09e1b, 8e6e3b1de69cacf19931ebe11cde67924b3322fd7237315feb177d88fca52aef result, different first party: 8674d974101becf77d4949e7f1556c950e8a6adf2a59ea1dc04974c6d11a0dfe, 542742c63399a7f626219b6d60b6a03ada7cded4a9b4f00726bd3a5407361039, 636cc0c095d94e9019b420c190fabeeafe9570b9f6aa3627bb7462695db36b88, 94bcbb335ca35aa4f524eb533fa67ca41a34c48ad96b03fea52bfd68f5d5ee77, 5a1cda84f30ac78726f1d42eb300261cd75b391fe27fdd7a18193c1a3ac6de27 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: e5b635f894d60d351319b934780df91cb1f6c41f154f5bfacdce5fd8011b5f52, d4106a3155db1d143c7afa5b65311bb1e28503f200171b8c4de20f5862457e7b, cf219d6ad0a49c180822f198ab9b11bca2853ca3f179d4277b4dbb0b6f245193, 3d0c1e73a341b1532257a2d6f00dc7ac6a9bcf43e0b403d709956bec8ae7847a, 667b02d24b07e21e06a1c3de45d23ddd7100a72b71e29699f969a3091fb52020 result, different first party: 1aace83c16d3e5bbe9cc0c42a8614f597da1d3071d07e8b591f0017dbcfcd6ce, 58ef7b0d1c711d44c637f6bd35fce7a2b5a0709195dd71cf69fcbcb15a28867f, 91d29386ce22cbb6bfdad848530d30e306bec6cca5dafe4c0994ae13afc238e9, 3a1acbe1bcbaf5a7c7f393906d5833b5b2f30daad9ec0371841b2a343ebeea06, 845bfe7122971afb232226f7e669bc20b851d10aef808a2b9a732f21f630cfff 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: b9d49bedf3276dd7dbc3d221c13950d171e3027d13bea8eeaf59b8e8de283684, 9d3b6416f1bdf7f7a05b2d39eff8804c43718cf237b32fad47fc0f4f7602d2f5, b324d38b9e7585d9d78a25db7cf23c76ec02ff0dbf6177927f5aa189cf0eb9f7, c6315a9b62b624be794e9f18e435f80ae067553b1285e106434aa76949e04af9 result, different first party: f6952c348d038940a04955e99fd3eed2f484ddb49446811c310f37f1f8da9039, c85438ccb26649796bec6d08d41a7e745184bb32a8339ef73024f2548a97dfd3, f71895302472db866a39345efa5527b6415f03e9026c09cb07c5b5da44b467d5, 1e74ec19f04b2ac3ea31847c823698eb846a6055969efbcd5ec793dd71a95dae 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: 9c51c0f86c3984ac3ac11e4cfe3814363557f261c57da7f0b422bdba14ca8acb, d5197f7b80d86013b088a434fa111f5b1a1552f7f053dd5eea0d3485f493f6f8, 029e40b402c5230161e275b47a909aaa4d12801321d03347e36d3b5985df3218, 60a865ba9e7ae7a92471e45caf469914dd2e6e54d327d196939f75d784c2bda9, 0d1d8167b6b61081c37d8a80c410d926cd1234eb7fed64804310ddca5d444171 result, different first party: 22672845a14ded61bf565d84d6b563137230d01edfba9ef363b671927dd1b23f, 227732e95c729933f14d297037ef356ed83fac803ff0d492b4ae8f47fbe1dd2c, e726ef4931d523783635f52cd17a6ca2bc9bf6169ae3559522c8f2535c412398, a251742ea654dd4a256e44c082a5c03b342f7ab32ffda369bd23a0881eeb9676, f21ec4b01b305fa65c5dc086c0a28e273576394e0793a33731c1b0c244ea524a 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: 35c6aa663ecbb17ae29d362f5b77d5c8692e6cce72bd418838a8b7e2a5703bb2, 6f52af38f8a572c14ce654ef4fb5577443767e2c653f4f7e5420951bb224460c, 666a3bcd9b909f731c16045b09eae9c7dfa585acc81b38b7e774ed64cae51173, 92eaed6a068879a54501c2098443b264136b2216ca5d323042cacd9cfbc79a7b, 0d706e3c438ea20f6eaab6a939fca56a2d06bb4ce02b237ae49aa4b0744304db result, different first party: df07befde69e26996af0d6bb3f021146b018378533f785007a789b742a227da4, ce64c03d8fe825ed1ed5ea4728f1fe392d099798417306dbe5af962440ebf895, ab0d84924f06d8031d125277053fb2a6d6fbfa25045b27b352d15f826f6a7779, 8bcc8ae8ce52e45c66e9bf8b31e8ffa8df45a24422628a750b0b365d8bd1e31b, dffb0e876c05dc21f1ddaac4d263512882338c7572ea377a662f48c310cb72b7 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: 422e455bb1101d275d1e63a862bbe1c10a748e5baaa2810fc9dd08cb9470bc85, fb116dc7eddebfcb65a04192c39f6ede00f468c239e1b79679cef217e3b11d4e, 358a6380ad1283fa35c92b95aaf3ef23688a33ed734390c475f7375838f774b8, a6f9194a3bcde6f430e402f074ababaf19f02ee5dfdab08fac2ca23e0bc00e16 result, different first party: 3b1149fecd05947fde4cf3dbefb92ee26c0d88d833f1964c444da0dd8ab78503, ba78cf4c73b4d31ee18a3bb4975c28c24c122feef992db0f7124ac5e91075996, 7a823bd31580c393151cd171b8dd068fcbaabffc17600c774bb1137445266386, 4366ef79cfc2bd3444678977b089059f71108e3cca7b502d1dbc85b577a4b961 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: d087bc0bd6725db3732bae3094361306b6c81622e39f59cc2966c693ab59707a, c16daf41b4282da39c3e2b16c49cbe242f3317503ed85fcec860928956e59631, 096e0b103b765f51e5f63b71428711ce5dadde842fb8decfed9be16a60845dfc, 2b4f46274a851f472bbf6f960c44794432d9d1989da1233805c5a6f69212243a, dcf670b5e0f98a252ff5ec525702115f400333a9482951a3a168c1571c71d561 result, different first party: dde09dea16005b5aa9fc6f936f4c21b0c07a5dac350b5cf5c53f3c1bbe6a3ec1, 24df78ca7f8afe63a6895758cb08345d771912b0c2f33e4c108ce7e3ddebb78c, de3ef732d3cbbbe563723a3201eded14f448402170fb72dc4c4083a920a0d55a, e28279d01f2d4572b507d45bbbd671b8c6e265d4b6f1a0f3d260486682bb7a99, a630e780d795dab1aaa0a02f08ef175a7d39b1f469128444656f501c4f5ee960 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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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 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 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: 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: 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 prevent websites from sharing tracking data when you click on a link?
When you click a hyperlink to navigate your browser from one site to another, certain browser APIs allow the first site to communicate to the second site. These privacy vulnerabilities can be fixed by introducing new limits on how much data is transfered between sites.',
document.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/ 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/ 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/ 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
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: 761073ae-020f-499f-af87-8fb29196841a, ac43c278-3a30-4912-9c0f-5243a474c8ed, 10ce8bfd-740b-44d7-aa6c-e65f01865ab9, a84fe0c1-0a24-4dff-899a-9f4e6f642a87, 78ad69c9-a78a-47d4-898b-6fa82aca6139 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: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: 66d2911b-bb7b-4432-8853-cb1bf76bcab6, 0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, 4ac9b8de-acc7-419d-82f3-3135e216d810, df8e499f-6755-4b2e-833f-6b68f18f1ac9 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: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: 992079a3-09b0-4041-9ebf-92360ba95603, 81a2a622-6a87-424a-8f80-bfb75b674de2, 42a450d7-33a4-4893-8c6f-d0e820f6841a, 61286460-f301-4333-8851-cd43b3bb11b5, ace9b83b-ece9-4865-985e-3650d0c42c8e 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: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, 0cf28453-e38b-4522-9bc0-383e17d3303e, 5fe069df-1083-4f76-b85f-55afe892be55, 2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, b2596ae0-7480-4095-adbb-8740ea50d905 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: aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, cf03aced-9858-4f50-af7e-1d72eb585f23, da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, 367acb12-05bb-4ad5-b263-2bc1d80053f1, 244d7dd7-b001-4cf3-8421-239e90a0a885 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: 63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, 89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, a78607a1-c06c-48ae-8aaa-b925b51dcb79, 8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, 9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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: c2d73463-1230-42d7-b93b-aa571f668b8a, 2b918bc2-1e15-4892-969f-1db91eb8a7c7, e89eb5be-23d3-4992-abe9-4b480892022b, 1d0ba822-4ecf-4190-8372-bab9527e555d, 3de03f43-288c-4f34-bd9b-d5f90c44db88 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: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: 477f1d21-0432-4fdf-952c-0399c8cc796b, 1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, 5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, b0b19fc3-4730-4376-bd51-9d2f337d64d2 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: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 result, different first party: 742285d0-b634-4662-9ce5-1325d5c255a1, 8a74b705-0b17-4486-908b-eb10f41db9ad, 125faaeb-8307-4b7a-a3c0-a3171c246401, 731edf28-16d8-4b3f-b1be-233d36fcedd5, e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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: 674f237c-095f-45dd-a484-f81b702e555f, 1bef202e-e961-4e68-9295-d56a4c94c5eb, 2208fbd7-844e-4628-8acd-62777242944f, a4f73dc3-89cc-415f-b629-4c5e910aafca, cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 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: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: 467b9a82-a3f5-4477-bb99-c4ce5d58a27f, ce588a80-18c3-4aa7-8016-3058e33aadfc, 92bc68ea-2342-4eb9-be1a-485ec554528c, 5ea3fb62-b54a-48e3-bdce-34cd138e561b 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: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: a305d4f8-2446-4508-bd6b-7d35aacdc80c, d499b237-714a-4f4b-a761-39b37bac903f, 4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, 5881aba5-e1be-47fd-a4a5-9aadbdd66f92, 89b14e82-8df7-46c6-b55c-8164c729f99e 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_761073ae-020f-499f-af87-8fb29196841a, name_ac43c278-3a30-4912-9c0f-5243a474c8ed, name_10ce8bfd-740b-44d7-aa6c-e65f01865ab9, name_a84fe0c1-0a24-4dff-899a-9f4e6f642a87, name_78ad69c9-a78a-47d4-898b-6fa82aca6139 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_66d2911b-bb7b-4432-8853-cb1bf76bcab6, name_0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, name_4ac9b8de-acc7-419d-82f3-3135e216d810, name_df8e499f-6755-4b2e-833f-6b68f18f1ac9 result, different first party: name_66d2911b-bb7b-4432-8853-cb1bf76bcab6, name_0b44a8f9-e16f-4602-9b7e-2c7f79bf5353, name_4ac9b8de-acc7-419d-82f3-3135e216d810, name_df8e499f-6755-4b2e-833f-6b68f18f1ac9 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_992079a3-09b0-4041-9ebf-92360ba95603, name_81a2a622-6a87-424a-8f80-bfb75b674de2, name_42a450d7-33a4-4893-8c6f-d0e820f6841a, name_61286460-f301-4333-8851-cd43b3bb11b5, name_ace9b83b-ece9-4865-985e-3650d0c42c8e result, different first party: name_992079a3-09b0-4041-9ebf-92360ba95603, name_81a2a622-6a87-424a-8f80-bfb75b674de2, name_42a450d7-33a4-4893-8c6f-d0e820f6841a, name_61286460-f301-4333-8851-cd43b3bb11b5, name_ace9b83b-ece9-4865-985e-3650d0c42c8e 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_e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, name_0cf28453-e38b-4522-9bc0-383e17d3303e, name_5fe069df-1083-4f76-b85f-55afe892be55, name_2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, name_b2596ae0-7480-4095-adbb-8740ea50d905 result, different first party: name_e6dbbb5f-065f-4c66-ad4f-d7b455ecc023, name_0cf28453-e38b-4522-9bc0-383e17d3303e, name_5fe069df-1083-4f76-b85f-55afe892be55, name_2e30dbe2-e3e3-4abc-8bc1-70b49fa2f277, name_b2596ae0-7480-4095-adbb-8740ea50d905 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_aa3a7ab0-c985-42ab-a055-1fc3bd63ebbc, name_cf03aced-9858-4f50-af7e-1d72eb585f23, name_da0e71fa-ff9a-4ea7-9576-b1115aa07d8e, name_367acb12-05bb-4ad5-b263-2bc1d80053f1, name_244d7dd7-b001-4cf3-8421-239e90a0a885 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_63b4974a-65e4-4a94-8ecd-fddf68a9c7e1, name_89b8f1fb-b0af-4a8f-88db-cdea4c124bd2, name_a78607a1-c06c-48ae-8aaa-b925b51dcb79, name_8e7ef9ee-418f-4e18-9d60-ad6e7ed380a8, name_9f6e2cde-4226-4c08-9de8-6aa0a8c83d0a 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_c2d73463-1230-42d7-b93b-aa571f668b8a, name_2b918bc2-1e15-4892-969f-1db91eb8a7c7, name_e89eb5be-23d3-4992-abe9-4b480892022b, name_1d0ba822-4ecf-4190-8372-bab9527e555d, name_3de03f43-288c-4f34-bd9b-d5f90c44db88 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_477f1d21-0432-4fdf-952c-0399c8cc796b, name_1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, name_5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, name_b0b19fc3-4730-4376-bd51-9d2f337d64d2 result, different first party: name_477f1d21-0432-4fdf-952c-0399c8cc796b, name_1fa577d7-d3a1-4e9e-b00d-8c32ce7352d0, name_5bd342ac-4fc1-4ed8-a994-52bdbbe5194f, name_b0b19fc3-4730-4376-bd51-9d2f337d64d2 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_742285d0-b634-4662-9ce5-1325d5c255a1, name_8a74b705-0b17-4486-908b-eb10f41db9ad, name_125faaeb-8307-4b7a-a3c0-a3171c246401, name_731edf28-16d8-4b3f-b1be-233d36fcedd5, name_e1820bbb-62ad-48b0-841d-3d3c84ea73f1 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_674f237c-095f-45dd-a484-f81b702e555f, name_1bef202e-e961-4e68-9295-d56a4c94c5eb, name_2208fbd7-844e-4628-8acd-62777242944f, name_a4f73dc3-89cc-415f-b629-4c5e910aafca, name_cacbf2f4-db72-49b8-9bd7-c8a7c0c0a7f4 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_467b9a82-a3f5-4477-bb99-c4ce5d58a27f, name_ce588a80-18c3-4aa7-8016-3058e33aadfc, name_92bc68ea-2342-4eb9-be1a-485ec554528c, name_5ea3fb62-b54a-48e3-bdce-34cd138e561b result, different first party: name_467b9a82-a3f5-4477-bb99-c4ce5d58a27f, name_ce588a80-18c3-4aa7-8016-3058e33aadfc, name_92bc68ea-2342-4eb9-be1a-485ec554528c, name_5ea3fb62-b54a-48e3-bdce-34cd138e561b 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_a305d4f8-2446-4508-bd6b-7d35aacdc80c, name_d499b237-714a-4f4b-a761-39b37bac903f, name_4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, name_5881aba5-e1be-47fd-a4a5-9aadbdd66f92, name_89b14e82-8df7-46c6-b55c-8164c729f99e result, different first party: name_a305d4f8-2446-4508-bd6b-7d35aacdc80c, name_d499b237-714a-4f4b-a761-39b37bac903f, name_4fa97c1a-ac0f-4fd8-8416-bda71b3df5a0, name_5881aba5-e1be-47fd-a4a5-9aadbdd66f92, name_89b14e82-8df7-46c6-b55c-8164c729f99e 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 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 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: 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 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
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 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 passed: false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false passed: 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 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 passed: false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false passed: 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 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 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
  passed: true,true,true,true result: 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 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 result: 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 result: 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
  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
  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
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
  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
  passed: 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
  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: true,true,true,true,true
  passed: 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 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 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: false,false,false,false,false readSameFirstParty: 51.89.153.112,2a0b:f4c2:2::57,2a0b:f4c2:2::39,38.97.116.244,2001:67c:6ec:203:192:42:116:196 readDifferentFirstParty: 2a06:1700:0:15::4,38.97.116.244,185.220.103.5,5.34.182.5,2001:67c:289c:2::235 passed: true,true,true,true,true testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true 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
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 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 passed: false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: true,true,true,true,true passed: true,true,true,true,true
  IsTorExit: false,false,false,false passed: 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 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 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: undefined 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
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 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 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: 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 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
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 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: 504,504,504,504 desired value: undefined passed: false,false,false,false
  expression: outerHeight desired expression: undefined actual value: 520,520,520,520,520 desired value: undefined passed: false,false,false,false,false
  expression: outerHeight desired expression: undefined actual value: 1524,1524,1524,1524,1524 desired value: undefined passed: true,true,true,true,true
  expression: outerHeight desired expression: undefined actual value: 472,472,472,472 desired value: undefined passed: 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 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 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: 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 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
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 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 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: 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 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
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 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 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 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
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 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 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: 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
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: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
__hsscHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
__hstcHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
__sDrip.com email address tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
_hsencHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
_openstatYandex tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
dclidDoubleClick Click ID (Google)
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
fbclidFacebook Click Identifier
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
gclidGoogle Click Identifier
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
hsCtaTrackingHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
mc_eidMailchimp Email ID (email recipient's address)
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
mkt_tokAdobe Marketo tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
ml_subscriberMailerLite email tracking
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
ml_subscriber_hashMailerLite email tracking
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
msclkidMicrosoft Click ID
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
oly_anon_idOmeda marketing 'anonymous' customer id
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
oly_enc_idOmeda marketing 'known' customer id
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
rb_clickidUnknown high-entropy tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
s_cidAdobe Site Catalyst tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
vero_convVero tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
vero_idVero tracking parameter
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
wickedidWicked Reports e-commerce tracking
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
yclidYandex Click ID
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false,false
  value: 6472679007464266 passed: false,false,false,false
  value: 6472679007464266 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: 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
  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
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: 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
  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
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: 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
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false
  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: 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
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false
  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: 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
  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
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: 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
  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
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: 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
  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
DoubleClick (Google)Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false
  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
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false
  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: 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
  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
Google (third-party ad pixel)Tests whether the browser blocks the page from loading the tracker at https://www.google.com/pagead/1p-user-list/
  url: https://www.google.com/pagead/1p-user-list/ passed: true,true,true,true,true
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false
  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
  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
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: 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
  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
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: 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
  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
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: 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
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,true
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: 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
  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
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: 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
  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
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: 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
  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
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: 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
  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
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: 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
  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
  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: 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
  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
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false