Android Browsers
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brave
1.37

bromite
100.0

chrome
100.0

duckduckgo
5.121

edge
100.0

firefox
99.2

focus
99.2

mull
98.2

opera
68.3

samsung
16.2

tor
11.0

vivaldi
5.2

yandex
22.3
State Partitioning testsA common vulnerability of web browsers is that they allow tracking companies to 'tag' your browser with some data ('state') that identifies you. When third-party trackers are embedded in websites, they can see this identifying data as you browse to different websites. Fortunately, it is possible for this category of leaks to be fixed by partitioning all data stored in the browser such that no data can be shared between websites.
Alt-SvcAlt-Svc allows the server to indicate to the web browser that a resource should be loaded on a different server. Because this is a persistent setting, it could be used to track users across websites if it is not correctly partitioned.
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, Error: Unsupported, Error: Unsupported, h3, h3 result, different first party: h3, h2, h2, h3, h3 unsupported: false, true, true, false, false passed: false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, Error: Unsupported, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, true, false passed: true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: Error: Unsupported result, different first party: h2 unsupported: true passed: undefined test failed: false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; await fetch("https://altsvc.arthuredelstein.net:4433/clear"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after clear:", responseText); // Store "h3" state in Alt-Svc cache await fetch("https://altsvc.arthuredelstein.net:4433/set"); await sleepMs(100); responseText = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); console.log("after set:", responseText); } read: async () => { const protocol = await fetchText("https://altsvc.arthuredelstein.net:4433/protocol"); if ((new URL(location)).searchParams.get("thirdparty") === "same") { if (protocol !== "h3") { throw new Error("Unsupported"); } } return protocol; } result, same first party: h3, h3, h3 result, different first party: h3, h3, h3 unsupported: false, false, false passed: false, false, false test failed: 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b result, different first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d result, different first party: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b result, different first party: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: Error: NetworkError when attempting to fetch resource. unsupported: false passed: true test failed: false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: 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: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b 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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d result, different first party: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d 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: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c 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: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab 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: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 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: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 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: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b 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: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f 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: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff 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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a 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: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: Error: The operation is insecure. unsupported: false passed: true test failed: false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: 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: db4a4976-3f4b-4464-b035-3cb96987017f, db4a4976-3f4b-4464-b035-3cb96987017f, db4a4976-3f4b-4464-b035-3cb96987017f, db4a4976-3f4b-4464-b035-3cb96987017f, db4a4976-3f4b-4464-b035-3cb96987017f result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: cfc23bc0-1b50-454a-bd4b-4faa79e27282, cfc23bc0-1b50-454a-bd4b-4faa79e27282, cfc23bc0-1b50-454a-bd4b-4faa79e27282, cfc23bc0-1b50-454a-bd4b-4faa79e27282, cfc23bc0-1b50-454a-bd4b-4faa79e27282 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b result, different first party: fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b, fb760fe6-3247-43d9-a7e5-dae8b1914e2b 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc result, different first party: 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc, 8431696f-e29e-42c3-8dde-cdd4f3269edc unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916 result, different first party: 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916, 73ff56ac-8f2c-4879-861c-16d226e63916 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a result, different first party: dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a, dbd0fdf5-1be2-41d7-a0aa-b0261e5fe14a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 1c6f45dd-c6f8-49c2-b333-53ea2929d324, 1c6f45dd-c6f8-49c2-b333-53ea2929d324, 1c6f45dd-c6f8-49c2-b333-53ea2929d324, 1c6f45dd-c6f8-49c2-b333-53ea2929d324, 1c6f45dd-c6f8-49c2-b333-53ea2929d324 result, different first party: Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined, Error: cacheKeys[0] is undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14 result, different first party: 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14, 6cb5d9ac-b62f-41d9-a41e-5ee36aeaee14 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8 result, different first party: ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8, ec45e5be-a09a-4677-9e6e-714e2a54cbc8 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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. result, different first party: Error: The operation is insecure. unsupported: true passed: undefined test failed: false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e result, different first party: 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: fc6672b5-c2e0-40e1-bac8-008f561e753b, fc6672b5-c2e0-40e1-bac8-008f561e753b, fc6672b5-c2e0-40e1-bac8-008f561e753b result, different first party: fc6672b5-c2e0-40e1-bac8-008f561e753b, fc6672b5-c2e0-40e1-bac8-008f561e753b, fc6672b5-c2e0-40e1-bac8-008f561e753b unsupported: false, false, false passed: false, false, false test failed: 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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f_http, 6c9259de-26f4-4e8c-b021-de235680b12d_http, 6195a074-73b5-484c-b37c-6d116121e1ab_http, 360167e6-d44a-4569-8478-7c6815421aae_http, 7961de71-0b40-4f58-9c03-db62424ead9b_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965_http, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4_http, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0_http, 963d66c4-0851-4caf-9351-9ccbbe029f34_http, d653b5ca-87b2-4cec-a912-53e01b69a17d_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e_http, 55caa6f3-7592-4352-9966-ad01562e4dcc_http, e43a0380-59b0-4409-b124-c08e669ed2ed_http, b9ccc23d-8f82-4078-87d5-0356ee522198_http, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c_http result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e_http, 55caa6f3-7592-4352-9966-ad01562e4dcc_http, e43a0380-59b0-4409-b124-c08e669ed2ed_http, b9ccc23d-8f82-4078-87d5-0356ee522198_http, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 2847aa47-c0a1-45f0-894a-a254eb26e110_http, 3f56e52c-42c8-4d92-9682-7b309b2f9a01_http, 7e589a9c-1efb-4438-862b-43b5f65c8203_http, 48bfe902-6006-4500-8093-a132433688f1_http, d23dc581-9e1a-4ab5-8438-4c4e140b02ab_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: d614b020-8bca-441d-b1ba-07b30e8b3117_http, 7107a133-613c-4260-a36d-0329821cb4c5_http, 6e45734d-2d6c-4882-94b4-dd56fac18cb4_http, 7ea5091b-cac2-432b-8ad1-f901a016a7af_http, 329a6844-017f-4db2-a0e6-512148922859_http result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117_http, 7107a133-613c-4260-a36d-0329821cb4c5_http, 6e45734d-2d6c-4882-94b4-dd56fac18cb4_http, 7ea5091b-cac2-432b-8ad1-f901a016a7af_http, 329a6844-017f-4db2-a0e6-512148922859_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: d6fa75d7-c597-4346-9876-8510867ec736_http, deb73965-3e16-4ab8-b6a5-cd239de08b4d_http, f1a03449-0504-4f32-ada4-7bb93fc341b0_http, e24a4853-09e9-477b-9438-427bfe5fe172_http, bec0c93d-e263-4bfe-94c6-fb1f17406285_http result, different first party: d6fa75d7-c597-4346-9876-8510867ec736_http, deb73965-3e16-4ab8-b6a5-cd239de08b4d_http, f1a03449-0504-4f32-ada4-7bb93fc341b0_http, e24a4853-09e9-477b-9438-427bfe5fe172_http, bec0c93d-e263-4bfe-94c6-fb1f17406285_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: f3aa819b-e0a9-4f67-b132-dab2654d4417_http, 207c6987-e251-4a99-ba29-0a4d746b0c38_http, 77f58fde-6b56-42a6-beed-8d0e266c1baf_http, 0990fd93-f64a-469f-8f5c-63d716808353_http, 201cd44b-3876-4a36-8400-0eb27e430b3b_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 1b6f80e1-0e2a-4f40-b011-b06825e7e422_http, 11676152-46cd-42dd-8df3-652d96a43f4a_http, cc524a3d-027b-4ff6-8a94-f60cb6c176fb_http, 50c41c3d-1efd-4965-baa1-84be31b59c36_http, 502034c5-1b04-4fd4-badb-3e2707e3231f_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be_http, 38e13a92-21c7-4cb7-beed-5d38241f0e08_http, d13c60e7-7b7e-4108-8717-fcc08041c7ba_http, ae22a043-673b-41f8-847e-11161a13d399_http, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff_http result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be_http, 38e13a92-21c7-4cb7-beed-5d38241f0e08_http, d13c60e7-7b7e-4108-8717-fcc08041c7ba_http, ae22a043-673b-41f8-847e-11161a13d399_http, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3_http, 7b540b71-44e3-4303-afe7-d7569fa1efd4_http, 9f1a90f2-4883-4e0f-8003-096cae9cc581_http, 533bb531-7d32-44c4-967c-9828c9fd7460_http, f43753cf-051f-493e-bf75-693f9d3adc1a_http result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3_http, 7b540b71-44e3-4303-afe7-d7569fa1efd4_http, 9f1a90f2-4883-4e0f-8003-096cae9cc581_http, 533bb531-7d32-44c4-967c-9828c9fd7460_http, f43753cf-051f-493e-bf75-693f9d3adc1a_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 8dd69c75-5b93-4704-bb6a-af33968f5618_http result, different first party: null unsupported: false passed: true test failed: false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d_http, 66f41eef-1a19-4dab-8e33-1d4262cd5976_http, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc_http, 7d440765-fda6-4c03-8222-3961d6bd11bf_http, dc62f1bd-9914-4af2-9f12-ef47bfdde41a_http result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d_http, 66f41eef-1a19-4dab-8e33-1d4262cd5976_http, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc_http, 7d440765-fda6-4c03-8222-3961d6bd11bf_http, dc62f1bd-9914-4af2-9f12-ef47bfdde41a_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: ffabed1e-22cb-4490-923d-af841f98abfa_http, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f_http, 8c986845-6981-47bd-bcb8-a3c9083d6e36_http result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa_http, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f_http, 8c986845-6981-47bd-bcb8-a3c9083d6e36_http unsupported: false, false, false passed: false, false, false test failed: false, false, false
cookie (JS)The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them.
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f_js, 6c9259de-26f4-4e8c-b021-de235680b12d_js, 6195a074-73b5-484c-b37c-6d116121e1ab_js, 360167e6-d44a-4569-8478-7c6815421aae_js, 7961de71-0b40-4f58-9c03-db62424ead9b_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965_js, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4_js, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0_js, 963d66c4-0851-4caf-9351-9ccbbe029f34_js, d653b5ca-87b2-4cec-a912-53e01b69a17d_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e_js, 55caa6f3-7592-4352-9966-ad01562e4dcc_js, e43a0380-59b0-4409-b124-c08e669ed2ed_js, b9ccc23d-8f82-4078-87d5-0356ee522198_js, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c_js result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e_js, 55caa6f3-7592-4352-9966-ad01562e4dcc_js, e43a0380-59b0-4409-b124-c08e669ed2ed_js, b9ccc23d-8f82-4078-87d5-0356ee522198_js, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 2847aa47-c0a1-45f0-894a-a254eb26e110_js, 3f56e52c-42c8-4d92-9682-7b309b2f9a01_js, 7e589a9c-1efb-4438-862b-43b5f65c8203_js, 48bfe902-6006-4500-8093-a132433688f1_js, d23dc581-9e1a-4ab5-8438-4c4e140b02ab_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: d614b020-8bca-441d-b1ba-07b30e8b3117_js, 7107a133-613c-4260-a36d-0329821cb4c5_js, 6e45734d-2d6c-4882-94b4-dd56fac18cb4_js, 7ea5091b-cac2-432b-8ad1-f901a016a7af_js, 329a6844-017f-4db2-a0e6-512148922859_js result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117_js, 7107a133-613c-4260-a36d-0329821cb4c5_js, 6e45734d-2d6c-4882-94b4-dd56fac18cb4_js, 7ea5091b-cac2-432b-8ad1-f901a016a7af_js, 329a6844-017f-4db2-a0e6-512148922859_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: d6fa75d7-c597-4346-9876-8510867ec736_js, deb73965-3e16-4ab8-b6a5-cd239de08b4d_js, f1a03449-0504-4f32-ada4-7bb93fc341b0_js, e24a4853-09e9-477b-9438-427bfe5fe172_js, bec0c93d-e263-4bfe-94c6-fb1f17406285_js result, different first party: d6fa75d7-c597-4346-9876-8510867ec736_js, deb73965-3e16-4ab8-b6a5-cd239de08b4d_js, f1a03449-0504-4f32-ada4-7bb93fc341b0_js, e24a4853-09e9-477b-9438-427bfe5fe172_js, bec0c93d-e263-4bfe-94c6-fb1f17406285_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: f3aa819b-e0a9-4f67-b132-dab2654d4417_js, 207c6987-e251-4a99-ba29-0a4d746b0c38_js, 77f58fde-6b56-42a6-beed-8d0e266c1baf_js, 0990fd93-f64a-469f-8f5c-63d716808353_js, 201cd44b-3876-4a36-8400-0eb27e430b3b_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 1b6f80e1-0e2a-4f40-b011-b06825e7e422_js, 11676152-46cd-42dd-8df3-652d96a43f4a_js, cc524a3d-027b-4ff6-8a94-f60cb6c176fb_js, 50c41c3d-1efd-4965-baa1-84be31b59c36_js, 502034c5-1b04-4fd4-badb-3e2707e3231f_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be_js, 38e13a92-21c7-4cb7-beed-5d38241f0e08_js, d13c60e7-7b7e-4108-8717-fcc08041c7ba_js, ae22a043-673b-41f8-847e-11161a13d399_js, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff_js result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be_js, 38e13a92-21c7-4cb7-beed-5d38241f0e08_js, d13c60e7-7b7e-4108-8717-fcc08041c7ba_js, ae22a043-673b-41f8-847e-11161a13d399_js, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3_js, 7b540b71-44e3-4303-afe7-d7569fa1efd4_js, 9f1a90f2-4883-4e0f-8003-096cae9cc581_js, 533bb531-7d32-44c4-967c-9828c9fd7460_js, f43753cf-051f-493e-bf75-693f9d3adc1a_js result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3_js, 7b540b71-44e3-4303-afe7-d7569fa1efd4_js, 9f1a90f2-4883-4e0f-8003-096cae9cc581_js, 533bb531-7d32-44c4-967c-9828c9fd7460_js, f43753cf-051f-493e-bf75-693f9d3adc1a_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 8dd69c75-5b93-4704-bb6a-af33968f5618_js result, different first party: null unsupported: false passed: true test failed: false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d_js, 66f41eef-1a19-4dab-8e33-1d4262cd5976_js, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc_js, 7d440765-fda6-4c03-8222-3961d6bd11bf_js, dc62f1bd-9914-4af2-9f12-ef47bfdde41a_js result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d_js, 66f41eef-1a19-4dab-8e33-1d4262cd5976_js, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc_js, 7d440765-fda6-4c03-8222-3961d6bd11bf_js, dc62f1bd-9914-4af2-9f12-ef47bfdde41a_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: ffabed1e-22cb-4490-923d-af841f98abfa_js, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f_js, 8c986845-6981-47bd-bcb8-a3c9083d6e36_js result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa_js, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f_js, 8c986845-6981-47bd-bcb8-a3c9083d6e36_js unsupported: false, false, false passed: false, false, false test failed: 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 += ``; 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 += ``; 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_35329990024836544, fake_11124503919021667, fake_6154724314996849, fake_710746568364671, fake_4711628967994901 result, different first party: fake_25241631045505875, fake_4668826066797809, fake_44171137879594125, fake_08213577507962433, fake_43542230265865633 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 += ``; 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 += ``; 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_8754321182369016, fake_3503145611603009, fake_5650383425315806, fake_9412595303700437, fake_18995682193970653 result, different first party: fake_8754321182369016, fake_3503145611603009, fake_5650383425315806, fake_9412595303700437, fake_18995682193970653 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 += ``; 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 += ``; 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_5306180402195202, fake_17225299626329993, fake_8801406254494613, fake_5868129044150263, fake_290223959212655 result, different first party: fake_46492434893262, fake_4858372394272996, fake_10845083314791704, fake_8549751449132943, fake_7969873382620296 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 += ``; 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 += ``; 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_3683483702430348, fake_9936435249774378, fake_6328547010524237, fake_7153236769426445, fake_2577985920409833 result, different first party: fake_3683483702430348, fake_9936435249774378, fake_6328547010524237, fake_7153236769426445, fake_2577985920409833 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 += ``; 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 += ``; 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_9481113923102218, fake_5028246523058193, fake_10821409610072341, fake_8302982270155201, fake_9310140719803477 result, different first party: fake_5807660452000794, fake_22983803542348968, fake_5870275158126699, fake_17764835790784383, fake_6475757839712881 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 += ``; 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 += ``; 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_46267539289325366, fake_163127558189464, fake_02651018985852982, fake_3038196633835901, fake_9796077878398173 result, different first party: fake_4861350413369854, fake_7195080432582432, fake_2656365609589988, fake_05795979828975151, fake_8986631716240325 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 += ``; 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 += ``; 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_6839064005128705, fake_28819104066172496, fake_8654786996567703, fake_9978100141498201, fake_8410971621504078 result, different first party: fake_30274725174658035, fake_12259305787389496, fake_20243131421859695, fake_32969469985308275, fake_9226096577124017 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 += ``; 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 += ``; 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_6681135200751394, fake_03210429571460005, fake_7147270817354399, fake_2987059681570434, fake_05063684134445445 result, different first party: fake_973347232919844, fake_9296964551801548, fake_7368584742546389, fake_86046161342973, fake_885321640448917 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 += ``; 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 += ``; 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_9862584444643923, fake_9793219318544135, fake_2043607470682669, fake_49583121391066176, fake_704259633530979 result, different first party: fake_9862584444643923, fake_9793219318544135, fake_2043607470682669, fake_49583121391066176, fake_704259633530979 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 += ``; 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 += ``; 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_07258010166219941, fake_8010044921790438, fake_8116964177770902, fake_9452634990325346, fake_36310355494033875 result, different first party: fake_07258010166219941, fake_8010044921790438, fake_8116964177770902, fake_9452634990325346, fake_36310355494033875 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 += ``; 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 += ``; 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_916925001914273 result, different first party: fake_841721904584007 unsupported: false passed: true test failed: false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; 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 += ``; 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_9900365135836007, fake_4753445612902376, fake_09681470508028611, fake_3952789326609143, fake_38231326460424886 result, different first party: fake_9900365135836007, fake_4753445612902376, fake_09681470508028611, fake_3952789326609143, fake_38231326460424886 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 += ``; 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 += ``; 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_1452679076328609, fake_0030555096675455307, fake_24239291062461032 result, different first party: fake_1452679076328609, fake_0030555096675455307, fake_24239291062461032 unsupported: false, false, false passed: false, false, false test failed: false, false, false
favicon cacheA favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites.
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1 result, different first party: 1 unsupported: false passed: false test failed: false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1 result, different first party: 2, 2, 2 unsupported: false, false, false passed: true, true, true test failed: false, false, false
fetch cacheWhen a resource is received via the Fetch API, it is frequently cached. That cache can potentially be abused for cross-site tracking.
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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: 1, 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 result, different first party: 2 unsupported: false passed: true test failed: false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1 result, different first party: 2, 2, 2 unsupported: false, false, false passed: true, true, true test failed: false, false, false
font cacheWeb fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking.
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 1, 2, 2 unsupported: false, false, false, false, false passed: true, false, false, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1 result, different first party: 2 unsupported: false passed: true test failed: false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1 result, different first party: 1, 1, 1 unsupported: false, false, false passed: false, false, false test failed: 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.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d 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.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab 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.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 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.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f 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.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a 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.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: unsupported: false passed: true test failed: false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: false, false, false
H2 connectionHTTP/2 is a web connection protocol introduced in 2015. Some browsers re-use HTTP/2 connections across websites and can thus be used to track users.
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b 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.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c 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.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 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.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b 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.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff 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.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: unsupported: false passed: true test failed: false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: 94e0f9aeed61b601e79ca1942bd339a3, ec3b67029dbfc03092da5b201d731b71, cbe1a1d559a9457d8734831ddf66ad33, e9b1c803f73b12f0966feafb60f24f74, 60d7a6c7e4afc1fb387bf6ae10c1cdd4 result, different first party: 0823460347619737ed6c6d3796f3a2d2, 814179ebda8214c3a845a2705761265f, 77b0fc5944cedb3a8d24431a5b449bbd, 6a7a652e290d72eb5a5238e627418bfa, a4b83da00177f2515eb3412c7302b834 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: 0c0b0f145c534d8e20bb1ce621eb281d, 18d59cb04f8b22dffd002eb039647d87, e345b417b5690e40952931fa3023b0b2, e97b9086d15b52d2bcff244055bdb786, f1057c510ae25e2cbc0ec3e38796578a 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: 6b850b751fd6ba7dd08b68546b3e7dad, , , 247a8ed80de201d9a1e42613a7614c7b, bfcda9eea82c1d49c92c5e1858b8a3f6 result, different first party: 6b850b751fd6ba7dd08b68546b3e7dad, , , 247a8ed80de201d9a1e42613a7614c7b, bfcda9eea82c1d49c92c5e1858b8a3f6 unsupported: false, true, true, false, false passed: 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: 02115656cd71bbf4b8caa25e34febb2c, 589cc7654aae9245325c1f1f187972c2, 27676806f32f0f445e978cf2611bb382, aa6f92b705353abb7a6b7256544353f8, 7f9d7659a1b3c2f249751b149ddd5e52 result, different first party: 02115656cd71bbf4b8caa25e34febb2c, 589cc7654aae9245325c1f1f187972c2, 27676806f32f0f445e978cf2611bb382, aa6f92b705353abb7a6b7256544353f8, 7f9d7659a1b3c2f249751b149ddd5e52 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: ce5a17d4279e2af9671d4060f34eb65b, 4cd3e15ebf1200104bf0f42ce135f363, d0ba27642e0856d9d98962fd44c3401a, b18730bfb8f32b4e7d5d4a8bcc332497, 3a150959e107bb7771debe15db1760c9 result, different first party: ce5a17d4279e2af9671d4060f34eb65b, 4cd3e15ebf1200104bf0f42ce135f363, d0ba27642e0856d9d98962fd44c3401a, b18730bfb8f32b4e7d5d4a8bcc332497, 3a150959e107bb7771debe15db1760c9 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: 9202612b61401010fa11f203a0a092e3, c596f3d1e8667677ace078249f488790, 81f1187671f656d618bf493e21889efd, 3b61243ed7af8c30bdbc769e75f5fb6e, 10336586b5ffd4c2cb38ce7731e352e3 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: cf1945c57ec9c1fcbb9264f42d7a3a5c, 7ea6fa0432361bee2c3627f37158b9fd, 27b3498a93c55e1d57d6c852dc2fc679, 2c3e015c01398622b105195d83ceecad, 76fa3c7058b5171cd090d66be1409d1c 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: 6521c96687c1b9742ecc9b57e9e365e1, e9501451b7a71a936ed0634905c1c3d2, fd32a6f2a5dff483d3c99ba1c382bcc7, 5c146ac40871c3f27356462efee1c3c2, 729e49ae63388acd534f05e3ab41eaa9 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: e32f2a399ebf9c9803d35e0bc71f3555, de773534f911f8a6a176c95bca70ce16, 1e345df05f98ffa639f2148c1382f39b, ae7dea7d8112789e34718bd40568a5a1, ff313b9c130f36030b88a54dd80d6388 result, different first party: e32f2a399ebf9c9803d35e0bc71f3555, de773534f911f8a6a176c95bca70ce16, 1e345df05f98ffa639f2148c1382f39b, ae7dea7d8112789e34718bd40568a5a1, ff313b9c130f36030b88a54dd80d6388 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: result, different first party: unsupported: true passed: undefined test failed: false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: a6e0275cf850ab8d8365ed7bd88ea21f, 9e4352fa4fe735c8f908b0c46f69728c, 8a94981511237358bb2c1108978ba36b, 659b6ad0d2c87109787c35f23411bea9, aab6a3fee5eefb1058ccd3a49433cabb result, different first party: a6e0275cf850ab8d8365ed7bd88ea21f, 9e4352fa4fe735c8f908b0c46f69728c, 8a94981511237358bb2c1108978ba36b, 659b6ad0d2c87109787c35f23411bea9, aab6a3fee5eefb1058ccd3a49433cabb 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.arthuredelstein.net:4434/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net: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.arthuredelstein.net:4434/connection_id`); return await response.text(); } result, same first party: 133b18fcd42bba57dc25022068288ab4, dd80f3b5e5ff329737a0d9700a3b2a25, 5c7ebfb55638fdcc7aac348e43bb904c result, different first party: 133b18fcd42bba57dc25022068288ab4, dd80f3b5e5ff329737a0d9700a3b2a25, 5c7ebfb55638fdcc7aac348e43bb904c unsupported: false, false, false passed: false, false, false test failed: 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: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  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: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: null read: null result, same first party: null result, different first party: HTTPS used by default; no HSTS cache issue expected unsupported: null passed: true test failed: false
  write: 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 result, different first party: Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false passed: false, false, false test failed: false, false, false
iframe cacheAn iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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 result, different first party: 2 unsupported: false passed: true test failed: false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1 result, different first party: 2, 2, 2 unsupported: false, false, false passed: true, true, true test failed: false, false, false
image cacheCaching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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 result, different first party: 2 unsupported: false passed: true test failed: false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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 result, different first party: 1, 1, 1 unsupported: false, false, false passed: false, false, false test failed: 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: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b 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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d 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: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c 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: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab 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: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 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: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 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: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f 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: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff 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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a 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. result, different first party: Error: The operation is insecure. unsupported: true passed: undefined test failed: false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: 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: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b 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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d result, different first party: Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'localStorage' property from 'Window': Access is denied for this document. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c 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: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab 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: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 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: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 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: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b 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: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f 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: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff 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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a 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: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: Error: The operation is insecure. unsupported: false passed: true test failed: false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: 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: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b result, different first party: Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied 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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d result, different first party: Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied 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: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c 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: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab 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: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 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: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 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: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b 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: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f 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: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff 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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a 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: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: Error: LockManager.query: query() is not allowed in this context unsupported: false passed: true test failed: false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: false, false, false
prefetch cacheA suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites.
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 1, 1, 2 unsupported: false, false, false, false, false passed: true, true, false, false, 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, 1, 2, 2 unsupported: false, false, false, false, false passed: true, true, false, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  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 result, different first party: 2 unsupported: false passed: true test failed: false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 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 result, different first party: 1, 1, 1 unsupported: false, false, false passed: false, false, false test failed: 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker. unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker. unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); 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: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 unsupported: false, false, false, false, false passed: false, false, false, false, false 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined unsupported: true passed: undefined test failed: false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); 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 () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); 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: ffabed1e-22cb-4490-923d-af841f98abfa, , result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, , unsupported: false, false, false passed: false test failed: false, true, true
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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f result, different first party: , Error: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: Error: The operation is insecure. unsupported: false passed: true test failed: false
write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) 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: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 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 unsupported: true, true, true passed: undefined test failed: 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: e9dc715363961173c746afa06fba4fbf0081e6796d0810dfabcb1dcbb0c9f48f, 110c0ec99526d9d9ef13239882043ffab464305837854c70eead4b57930f3af2, c0aad5ac1d483c87e0fa98eca80ff1f1f1ffdcd7b557cad28ae5cdecd2673e86, ed68c4f4acf7eb867963528a380ea12729589322a6e87835e2ecc3c948af4b48, 999d26f98560d3cde3a2d85cf0a3ee22268bfc0b70621583df979154be5d65a8 result, different first party: 6de2bd20bc360306ad850cdfb51cea611a2406c11e9b602a33166e482b339ed3, d34fc8c7949da704874c886bc670067ccde7adc1aa6c83096e7b8a3227ac86d2, 8e54631587bbb8644d30ddd266cde0da9a2a6303f48f5aa969470a193b3e312d, 8b491edc8295fac279ced4aa6444e4cb3ad910f5b52332f7437e41fa23c7b71c, efb72b0148832d1cc949bb01016461c1b03152d6fa3860881437f1e92cc8cbab 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 5fa140142378b6735629f6113cde0b4c4f2182fb3e6627fd42bb53318fa5cdba, 0692aa613d0e145b8d69ea01062331d3b8ad06ac5cd7e65592800a8c2ddd8895, 14da92e35dd517a5d0429380ff2b78661c71804ee14ac7f9f74ec4ba248267e4, e53f2ef2cdf4597d573e174ae1f7126b7541ed02f9748b60a82f084044b1a14c, 598c7841007bb0ad8959cd7dd84d97a7625a25004a1dd45cc153c8bbe579d30d result, different first party: 333097507791c2da8a9d2f6e6dd180fc0158cc8de14cc54cfc2cec9c441b1796, cbe28bd5b759c29b2c4becbef47727a99266f79e6f8fff7a90c5e2faf24a5443, e472318cd2136c48c335b73791db84fba4a95349a329f99f526dc71cac460f06, cd255944e39a6c8489d588e7775d39633f1055b9b29db54b1fd35625ef874181, bef7137a8c59159cf3e4859269e386626bc10c6b5a4c7fcf8297f6101df0d1ad 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: db73cc7140ad0c4d75a527a6732c434e6249bd7af60005a85c0e5cd87749f219, 47c6467ead1f75da342fbd6406c23372ae3c91a06e357113a65618c06f85be59, 8f2b6f359c9bffa86011d74788bad305eb1b921919a500208645875978134d56, 49149d317d92e7212ed4a3cbc81268619e9ad138c794d3ca5dc0207cb913c5a2, 3ff9759ab1d1ecf7c0152eccd2d35b2eaac5544b09a9816c2d03e451d74f53e1 result, different first party: ec9c4e4447d2dd359276f36216921f5cecd94985231020c1ea82143fbb0472fb, 32a1eb22c849fdd47afc0eb6291ad919731e613801989c7eab4f630ac6043c57, 49572db8721e8c5586dee632bef38fe9829a899e1360a35ca0d6dffbd74f1569, f6de7c2fbe0d8d66890252db66b00ecad64a7f0083d8371c36736e03d9df4fcb, dc4e568ffd4be97dd488aec65712082bce1c9d22f12e4ecf5c5147e687d46144 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 3740e591bc80732d66d2064fc290a1d6f7c47cdcbcc8c5855f78e0ac9ac7ede3, 838df05eac708997d16ef73e5159f3422aaff9a43549f655ca16456f90f59c21, 2e0603b85fcb287a919fc774347925976d257cfe8c5e2f43bdedcf7eed9d8015, a6b0fae9073ffb9726782411e6eb4d519e38bb38745e4ece341ce51d6c1b960e, f33f101e5561be9d29935932f3ef3371b32cf47b14cf57bf242bc8cfa100ebe0 result, different first party: b1a62b3dd1c45224fbf7d3de84f598dcbe824e8b205fd5cfa3a0dc1eb46aad4b, a4ef877af5035880268de2e714ac9531728337950c7b9d4fbb33e57484f730ad, 59887b6f002c69305b8cbbcbbd780f03de490d5f5b62f3655b675db8c218b12b, 67ec31106cc4331f80afbd8cd39101f0f5b5fe948e1853d7fa1e82bcbe7ccf62, bd9702f841124f39dd0844588333421b1d64e009198d03c3a3631651e216d583 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 2e829f20a128f14c4d63ee51b7e7d5d48ede9b1fb7405a58927a00c4156a223b, 524980c12f0f3b436cec8ffe52cbd33a1bc90525fe79a484f2949302685f8e26, 20cb6d0ca0a19584e2cee462a1e0e0e902bc9ea1d618cdbcefa79c5d2e91feab, 0a21597eb6ad609cc48a053ef63511000a79e919e73cfeec78a098cba899ff90, 5fd5ef5e06db2462456dc7400f90e0fb698c26d1451fe651d9ed9ed7d53b9212 result, different first party: 0dc98d70146b60de1d1ff7fdbe6666f7a92f30af4d0971236fcea108ccac3fe1, 1e0e49d11d25e5858d571c6044e31e8530a900f509e45b54b7e704ff40e2fcd1, 9975cc3c078f706acbf399b8381c2fbfb3f25b38f25ec929f6e724f676979e81, 2f0247e9fb34c2bd00748e1e3d34e9ce2a56576ece4edf6a0135ee964256c381, ac0f8a84e151561707933626f9924176ba8ce32d73397424c03ccf2795474743 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 094a647f5a756ba74de808a37076bb5d37f05408d8466f8ad7c099e4fa3bef71, f2a53ff5cfe58abb2f528fd816a15731f07ff1e1039302619b963323320fe06d, 61c4bb496630ab34b6e90aa34f6bd656ed400f52e695089122bd1913ee3d19ff, d2631ab1e93b89278fd1d1843d1c496570df909d882a40d72da0778a342c90e3, 5bd61399b7552e6ac75ed323f36ee48782fdee1712c709c6520b232c0b1d4333 result, different first party: 2b373250c5abe0c226c92a2a9d13bcb580cf4ef4251430718c57fed8710f511e, 2a0b739c8257a6fa21713e910c9d0978d0586aac78b66c8ae17aa5ffe94987cd, 7ff91037ea04df8699b7c7c2207fa7c511bdf140fffaaa4047b34f85b03dcfb0, 9b1ba895e2477e0a09397f2a8a70c2447b3da34966fc668059297911237cd9f9, 699612c967ce19bfb100117d7050e6434f27057243c2ac06ed7645d165fe0750 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 306c69a02ea76843fa90a053fa2e157fd7f36fd734c08196a5c3c03ae4724325, ece93fd868b761c663d6430eaab94797412ac311225e2cab1bc2973ca1df998e, a947dc5cb16e7edaa1030bd0a998d1c01beb16577314b877155255c3c74036c1, 0e5f564900addd5047b3a6b360ad1e86779888090cc1ccc991b905859ec050be, f8d0678ff83a6b42bf7ceb5aac2a9980d0af3096f867554efa9409d24ff5af15 result, different first party: ec611888a98cbb07773c0896d14124aa525fcb1b8e373cbe20409a683069b95a, 53bdb4b94b7a44bbc5dc720d00943f7283f2d003a602ba91e725bd87ba28e2ec, 31599aa66160f21eca3cc9382daefd0e628f7cd7038a01cc7595ff549ac3c7ff, f303b0292e1d6c856ee3009a6c59a28abeff737bac8061afc24d84bbb0af9cb3, c32d1eb99407a5c4c1f449554bbac3e42804137f374005b72cbf3b9192ab1eae 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 1cf3a1d4fedac5e8e590a8b2c2db24a83f5cb8fcbb403e47e319840cdc93f33d, 67895804b50e698c6a8076a7cc8b211cc7c4de6809310527fb48093a9b7bb4a8, f445987676f11cf561aa16ba6cebb0180ec24bbfb5d31ec3428f93903c9aa03f, 4461fc22ffc3a6f56cf7e1f0db17757c43954696da7fd24a06a13125f3549257, 0a67342cc1458f36561d4494fcf7a9c312efe6058ca3172d8f633622a99b21f3 result, different first party: 9534ae49f5e7115ef87b794f0622ee34d1a96b35fd6e3b86a46ab24b25c47c78, 38bb9565a43c35e7d9292380da51d71b7d6764cd31670f3444b36d991d3fc0a0, 4560125c16233013d9ae76fad94518b1dc4a2d86db5481451560a0e145331085, e39140f5c3382932fca0ad81502bf275c4df3870791970e9083e81b282fc9008, fb742fdbf1d1f9a3f3d3fd414e2a431e3a667dd28ac2d16913e5e1aa26d668c5 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 60f8c2424337a78cba928051c674e1bfa398992c21a52363f2991ef48cfa8cc0, d62d7f66654b81f7b945aada472d9f08717b8ed7a483ead5ac2d2ee9ae15ffaa, adb61fbfcb95c017bc93136590b9e70ae2762f933fac9e613f704762590856aa, 8b961b47a2e563308f82519f235768b0947510f2d6e1bdebe9243b39d6c02ba8, aa0adb9bfd35a39b8f20cb29039e3e951e5350b1a471c02f05f6e21936964d60 result, different first party: d37e86a9034ecf71d61251ac112b077c877227fc55fc24189289edd169b662bf, c1d231690ceb60b5ab5326f8d2e737447b4c8be60bc814a9a1e766fe8f03a5f7, 93f88aff0af07e9723ed3662eaf7f1f4913f5a1641b5bab4c323b900e88a6ec4, 3973e943ec5327b2fcbb716f43abcb68f771ba6468028b40206519dcdeeda9a9, cffa119659aaff2910c2a5eeb0437a6c8d6d5503153bbfd2397aa2b65be812eb 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: af7018a795238cfd9abbb970df52ca0636196bbcdec0dd6531630180c80283d1, e7548671d775bf4e6615c798451cb188f793b4423230bef0386a567872eab50d, a8168a0647ad443008fee1fbf37e5d87d88fb774420f3b9ba84abee5bb4e6c8a, f33d19e938e18314ec10c89b31f82bbae27f1915718a0f073b6a4380a7a9385f, da3b26936baadf5550c06a5de71034875d737c1d9a45d2d1bb053b76fa93dd03 result, different first party: 90d1aac83b8d3089a84264cb30e8849e280ad61dae2ca7c226cc008dae907a09, 3907efe879e8168f64192ed179c5048e2cec360d89e10222d634bf998b1ae48a, c065d945eebba61b6118ad49338085c16d20fe33217564aead6b99ce5cb4db90, 7e5080f07c02e87b1a3aaf14ed3ce92e21ee65c9a900341cf85e30232a2cc606, adced5d0d19fcf7def2af7597ed0e28ed4e84032d598d33ca189330be7eb930a 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 181cc6573b27c52211541dec40f48921e1ea44ae77b22ea082f57ba7bc3dc563 result, different first party: 6cd9468844afbd8e38694d7af0d294cd0fbe65488ab97f715c36da162efe8fa3 unsupported: false passed: true test failed: false
  write: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 4ce0d8f1b33343ea263f819e1b57e7998364f044897324e24d18df1a23d9ccc3, 4a271471711437f8b8df7a296ca4fd415f9dc4ec99ab0dd9175e075f04961d47, 478fd5bbe36e52c14b6725f0186cb79f17dcbb9417e47a5c536de2663f50b676, 3bcfd2e8f83c542b5d5c4a590a4aa4922c41f7a01edf2c4bdef43312d7c5414c, ef45fadcbc1b9d2d4cc350a7451249eef77daf3958c6d5bccc6a4075b5959bc7 result, different first party: e89ebb79ec0599542fa4dfccf928b00e4390574875a54f54d43395de27df6f11, e256ea05c2bc4c7399f6c075f3a5b59f5a35665d0855917f13c6f753756fc3d8, eb33831985486ded1477fb8e1fe8e7cc2c9eca00931ef7eb6c2344aacb7d9b0c, a184583b476a477609f3adb2fdfe60fe308baefbad5390cd424b067aff086495, 0cf91c5a8b339f1108927b73c479a0a2278bb973c96a5fb9f00fc03b8ab65692 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.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } read: async () => { let results = await fetch("https://tls.arthuredelstein.net:8900/"); return (await results.json()).sessionId; } result, same first party: 21ea3988228b04aa90b90f4e482ae4d49cc748772d730a829e7aaed03246636b, 525423f1eb4415894c0fec4f89cdb959f5ec2ed37d822b4eac632787e1ce6562, 774a711d08ee109d1db0ae8e278f1fc8b25e85ac0ccdaf793cf5d15a9807eea4 result, different first party: f787484384559b46387a3bb8159feb0c3aef3a41db7ddb3cfbab38fde07ab776, 28035a7a5723b5afdd90ed4902e4b72ec1664e05c142fe0636d32fc97d1d5806, f66616727f6f8f77e49f348e3606060e38747629b5b2542b5461af76e68b8072 unsupported: false, false, false passed: true, true, true test failed: 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("Unsupported"); } 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: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b 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("Unsupported"); } 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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d 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("Unsupported"); } 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: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c 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("Unsupported"); } 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: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } 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: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 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("Unsupported"); } 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: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } 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: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } 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: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } 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: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff 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("Unsupported"); } 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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } 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 result, different first party: Error: window.openDatabase is not a function unsupported: true passed: undefined test failed: false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } 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: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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("Unsupported"); } 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: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 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. unsupported: false, false, false passed: true, true, true test failed: false, false, false
XMLHttpRequest cacheSimilar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack.
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 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 result, different first party: 2 unsupported: false passed: true test failed: false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1 result, different first party: 2, 2, 2 unsupported: false, false, false passed: true, true, true test failed: false, false, false
Navigation testsWhen 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: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ 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: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/ unsupported: false passed: false test failed: false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false passed: false, false, false test failed: 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: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b 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: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d result, different first party: Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document., Error: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c 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: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab 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: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 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: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 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: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b 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: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f 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: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff 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: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a 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: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: null unsupported: false passed: true test failed: false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a 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: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: 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) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b result, different first party: 16eff9cc-f8d9-43b7-ad57-6a9ffe10073f, 6c9259de-26f4-4e8c-b021-de235680b12d, 6195a074-73b5-484c-b37c-6d116121e1ab, 360167e6-d44a-4569-8478-7c6815421aae, 7961de71-0b40-4f58-9c03-db62424ead9b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d result, different first party: e6677e4a-eb10-4ed7-ac66-d39a4f9b4965, 5299c77e-9627-4db2-9f2d-e1951a5ca4e4, 5a7ce7cf-92a8-4cf3-80a2-0840d30b92c0, 963d66c4-0851-4caf-9351-9ccbbe029f34, d653b5ca-87b2-4cec-a912-53e01b69a17d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c result, different first party: 196dfdbf-643a-4200-bf1d-00c216ac876e, 55caa6f3-7592-4352-9966-ad01562e4dcc, e43a0380-59b0-4409-b124-c08e669ed2ed, b9ccc23d-8f82-4078-87d5-0356ee522198, f9a9cb21-e6bc-413e-8ba8-919ccf59a73c unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab result, different first party: 2847aa47-c0a1-45f0-894a-a254eb26e110, 3f56e52c-42c8-4d92-9682-7b309b2f9a01, 7e589a9c-1efb-4438-862b-43b5f65c8203, 48bfe902-6006-4500-8093-a132433688f1, d23dc581-9e1a-4ab5-8438-4c4e140b02ab unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 result, different first party: d614b020-8bca-441d-b1ba-07b30e8b3117, 7107a133-613c-4260-a36d-0329821cb4c5, 6e45734d-2d6c-4882-94b4-dd56fac18cb4, 7ea5091b-cac2-432b-8ad1-f901a016a7af, 329a6844-017f-4db2-a0e6-512148922859 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 result, different first party: d6fa75d7-c597-4346-9876-8510867ec736, deb73965-3e16-4ab8-b6a5-cd239de08b4d, f1a03449-0504-4f32-ada4-7bb93fc341b0, e24a4853-09e9-477b-9438-427bfe5fe172, bec0c93d-e263-4bfe-94c6-fb1f17406285 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b result, different first party: f3aa819b-e0a9-4f67-b132-dab2654d4417, 207c6987-e251-4a99-ba29-0a4d746b0c38, 77f58fde-6b56-42a6-beed-8d0e266c1baf, 0990fd93-f64a-469f-8f5c-63d716808353, 201cd44b-3876-4a36-8400-0eb27e430b3b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f result, different first party: 1b6f80e1-0e2a-4f40-b011-b06825e7e422, 11676152-46cd-42dd-8df3-652d96a43f4a, cc524a3d-027b-4ff6-8a94-f60cb6c176fb, 50c41c3d-1efd-4965-baa1-84be31b59c36, 502034c5-1b04-4fd4-badb-3e2707e3231f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff result, different first party: eeca75b7-1e02-4cae-87fa-14f3d321f9be, 38e13a92-21c7-4cb7-beed-5d38241f0e08, d13c60e7-7b7e-4108-8717-fcc08041c7ba, ae22a043-673b-41f8-847e-11161a13d399, 92be5f29-7b52-4d8c-b3a7-193c31bec8ff unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a result, different first party: d04b1b78-d531-4bd7-9fc8-766e0eea16e3, 7b540b71-44e3-4303-afe7-d7569fa1efd4, 9f1a90f2-4883-4e0f-8003-096cae9cc581, 533bb531-7d32-44c4-967c-9828c9fd7460, f43753cf-051f-493e-bf75-693f9d3adc1a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 8dd69c75-5b93-4704-bb6a-af33968f5618 result, different first party: 8dd69c75-5b93-4704-bb6a-af33968f5618 unsupported: false passed: false test failed: false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a result, different first party: 26a046f3-7c93-40e5-a121-2a12595a105d, 66f41eef-1a19-4dab-8e33-1d4262cd5976, f35ab0ee-ab2d-48e5-bf52-3c2d356e8cdc, 7d440765-fda6-4c03-8222-3961d6bd11bf, dc62f1bd-9914-4af2-9f12-ef47bfdde41a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 result, different first party: ffabed1e-22cb-4490-923d-af841f98abfa, 4b8c17b8-d0b3-4598-bf95-46b5bc53200f, 8c986845-6981-47bd-bcb8-a3c9083d6e36 unsupported: false, false, false passed: false, false, false test failed: false, false, false
HTTPS testsHTTPS 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: true,true,true,true,true result: Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: true,true,true,true,true result: Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: true result: Insecure website never loaded
  passed: 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 result: 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: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true passed: true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false passed: 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: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true passed: true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false passed: false,false,false
Upgradable imageChecks to see if the browser attempts to upgrade an insecure address for an image to HTTPS whenever possible.
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: 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: false result: loaded insecurely
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true result: upgraded,upgraded,upgraded
Upgradable scriptChecks to see if the browser attempts to upgrade an insecure address for an script to HTTPS whenever possible.
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true result: blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true result: blocked,blocked,blocked
Misc testsThis category includes tests for the presence of miscellaneous privacy features.
GPC enabled first-partyThe Global Privacy Control is an HTTP header that can be sent by a browser to instruct a website not to sell the user's personal data to third parties. This test checks to see if the GPC header is sent by default to the top-level website.
  header value: 1 passed: true,true,true,true,true
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: 1 passed: true,true,true,true,true
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false
GPC enabled third-partyThe Global Privacy Control is an HTTP header that can be sent by a browser to instruct a visited website not to sell the user's personal data to other parties. This test checks to see if the GPC header is sent to third-party elements on the web page.
  sec-gpc: 1 passed: true,true,true,true,true
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false
  passed: false,false,false,false,false
  passed: false,false,false
IP address leakIP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address.
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: true
  passed: false,false,false,false,false
  passed: false,false,false
Stream isolationBrowsers that use Tor can use a different Tor circuit per top-level website.
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
  write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: false readSameFirstParty: 2a0b:f4c0:16c:14::1 readDifferentFirstParty: Error: Unsupported passed: true testFailed: false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false
Tor enabledThe Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default.
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: true passed: true
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false passed: false,false,false
Fingerprinting resistance testsFingerprinting 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: innerHeight actual value: 640,640,640,640,640 desired value: 1263,1263,1263,1263,1263 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1677,1677,1677,1677,1677 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: undefined desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1416,1416,1416,1416,1416 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: undefined desired value: 1524 passed: false
  expression: undefined desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1285,1285,1285,1285,1285 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 640,640,640 desired value: 1416,1416,1416 passed: false,false,false
Media query screen widthWidth of the user's screen in pixels.
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 980,980,980,980,980 desired value: 980,980,980,980,980 passed: true,true,true,true,true
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 980 desired value: 980 passed: true
  expression: undefined desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 360,360,360 desired value: 980,980,980 passed: false,false,false
outerHeightHeight of the browser window in pixels, including browser chrome.
  expression: outerHeight desired expression: innerHeight actual value: 464,464,464,464,464 desired value: 1263,1263,1263,1263,1263 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 560,560,560,560,560 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 512,512,512,512,512 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 616,616,616,616,616 desired value: 1677,1677,1677,1677,1677 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 512,512,512,512,512 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 616,616,616,616,616 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 616,616,616,616,616 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1524,1524,1524,1524,1524 desired value: 1524,1524,1524,1524,1524 passed: true,true,true,true,true
  expression: outerHeight desired expression: innerHeight actual value: 512,512,512,512,512 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 520,520,520,520,520 desired value: 1416,1416,1416,1416,1416 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1524 desired value: 1524 passed: true
  expression: outerHeight desired expression: innerHeight actual value: 472,472,472,472,472 desired value: 1285,1285,1285,1285,1285 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 520,520,520 desired value: 1416,1416,1416 passed: false,false,false
screen.heightHeight of the user's screen, in pixels.
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1263,1263,1263,1263,1263 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1677,1677,1677,1677,1677 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1524,1524,1524,1524,1524 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1524,1524,1524,1524,1524 desired value: 1524,1524,1524,1524,1524 passed: true,true,true,true,true
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1394,1394,1394,1394,1394 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1416,1416,1416,1416,1416 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1524 desired value: 1524 passed: true
  expression: screen.height desired expression: innerHeight actual value: 640,640,640,640,640 desired value: 1285,1285,1285,1285,1285 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 640,640,640 desired value: 1416,1416,1416 passed: false,false,false
screen.widthWidth of the user's screen, in pixels.
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 980,980,980,980,980 desired value: 980,980,980,980,980 passed: true,true,true,true,true
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 980 desired value: 980 passed: true
  expression: screen.width desired expression: innerWidth actual value: 360,360,360,360,360 desired value: 980,980,980,980,980 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 360,360,360 desired value: 980,980,980 passed: false,false,false
screenXPosition, in pixels, of the left edge of the browser window on screen.
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0 desired value: 0 passed: true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0 desired value: 0,0,0 passed: true,true,true
screenYPosition, in pixels, of the top edge of the browser window on screen.
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 24,24,24,24,24 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 80,80,80,80,80 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0 desired value: 0 passed: true
  expression: screenY desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenY desired expression: 0 actual value: 0,0,0 desired value: 0,0,0 passed: true,true,true
Tracking query parameter testsWhen 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: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
__hsscHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
__hstcHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
__sDrip.com email address tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
_hsencHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
_openstatYandex tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
dclidDoubleClick Click ID (Google)
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
fbclidFacebook Click Identifier
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
gclidGoogle Click Identifier
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
hsCtaTrackingHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
igshidInstagram tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
mc_eidMailchimp Email ID (email recipient's address)
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
mkt_tokAdobe Marketo tracking parameter
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
ml_subscriberMailerLite email tracking
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
ml_subscriber_hashMailerLite email tracking
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
msclkidMicrosoft Click ID
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
oly_anon_idOmeda marketing 'anonymous' customer id
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
oly_enc_idOmeda marketing 'known' customer id
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
rb_clickidUnknown high-entropy tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
s_cidAdobe Site Catalyst tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
vero_convVero tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
vero_idVero tracking parameter
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
wickedidWicked Reports e-commerce tracking
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
yclidYandex Click ID
  passed: true,true,true,true,true
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false
  value: 5738530205024763 passed: false,false,false,false,false
  value: 5738530205024763 passed: false,false,false
Tracker content blockingWhen you visit a web page, it frequently has third-party embedded tracking content, such as scripts and tracking pixels. These embedded components spy on you. Some browsers and browser extensions maintain list of tracking companies and block their content from being loaded. This section checks to see if a browser blocks 20 of the largest trackers listed by https://whotracks.me.
AdobeTests whether the browser blocks the page from loading the tracker at https://munchkin.marketo.net/munchkin.js
  url: https://munchkin.marketo.net/munchkin.js passed: true,true,true,true,true
  url: https://munchkin.marketo.net/munchkin.js passed: true,true,true,true,true
  url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false,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: 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
  url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false,false
  url: https://munchkin.marketo.net/munchkin.js passed: false,false,false
Adobe Audience ManagerTests whether the browser blocks the page from loading the tracker at https://dpm.demdex.net/ibs
  url: https://dpm.demdex.net/ibs passed: true,true,true,true,true
  url: https://dpm.demdex.net/ibs passed: true,true,true,true,true
  url: https://dpm.demdex.net/ibs passed: false,false,false,false,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: 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
  url: https://dpm.demdex.net/ibs passed: false,false,false,false,false
  url: https://dpm.demdex.net/ibs passed: false,false,false
Amazon adsystemTests whether the browser blocks the page from loading the tracker at https://s.amazon-adsystem.com/dcm
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false
AppNexusTests whether the browser blocks the page from loading the tracker at https://ib.adnxs.com/px?id=178248&t=1
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false
  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
Bing AdsTests whether the browser blocks the page from loading the tracker at https://bat.bing.com/bat.js
  url: https://bat.bing.com/bat.js passed: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: 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
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false
ChartbeatTests whether the browser blocks the page from loading the tracker at https://static.chartbeat.com/js/chartbeat.js
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: 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: 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
  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
CriteoTests whether the browser blocks the page from loading the tracker at https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,true,true,true,true
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,true,true,true,true
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false,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: 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
  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
DoubleClick (Google)Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false
  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
Facebook pixelTests whether the browser blocks the page from loading the tracker at https://www.facebook.com/tr?id=123
  url: https://www.facebook.com/tr?id=123 passed: true,true,true,true,true
  url: https://www.facebook.com/tr?id=123 passed: true,true,true,true,true
  url: https://www.facebook.com/tr?id=123 passed: false,false,false,false,false
  url: https://www.facebook.com/tr?id=123 passed: true,true,true,true,true
  url: https://www.facebook.com/tr?id=123 passed: false,false,false,false,false
  url: https://www.facebook.com/tr?id=123 passed: false,false,false,false,false
  url: https://www.facebook.com/tr?id=123 passed: true,true,true,true,true
  url: https://www.facebook.com/tr?id=123 passed: true,true,true,true,true
  url: https://www.facebook.com/tr?id=123 passed: true,true,true,true,true
  url: https://www.facebook.com/tr?id=123 passed: false,false,false,false,false
  url: https://www.facebook.com/tr?id=123 passed: false
  url: https://www.facebook.com/tr?id=123 passed: false,false,false,false,false
  url: https://www.facebook.com/tr?id=123 passed: false,false,false
Google (third-party ad pixel)Tests whether the browser blocks the page from loading the tracker at https://www.google.com/pagead/1p-user-list/
  url: https://www.google.com/pagead/1p-user-list/ passed: true,true,true,true,true
  url: https://www.google.com/pagead/1p-user-list/ passed: true,true,true,true,true
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: true,true,true,true,true
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: false
  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
Google AnalyticsTests whether the browser blocks the page from loading the tracker at https://google-analytics.com/urchin.js
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false
Google Tag ManagerTests whether the browser blocks the page from loading the tracker at https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false
  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
Index ExchangeTests whether the browser blocks the page from loading the tracker at https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false
  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
New RelicTests whether the browser blocks the page from loading the tracker at https://js-agent.newrelic.com/nr-1212.min.js
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,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: 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
  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
QuantcastTests whether the browser blocks the page from loading the tracker at https://pixel.quantserve.com/pixel
  url: https://pixel.quantserve.com/pixel passed: true,true,true,true,true
  url: https://pixel.quantserve.com/pixel passed: true,true,true,true,true
  url: https://pixel.quantserve.com/pixel passed: false,false,false,false,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: 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
  url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false
  url: https://pixel.quantserve.com/pixel passed: false,false,false
Scorecard Research BeaconTests whether the browser blocks the page from loading the tracker at https://sb.scorecardresearch.com/internal-c2/default/cs.js
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,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: 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
  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
TaboolaTests whether the browser blocks the page from loading the tracker at https://trc.taboola.com/futureplc-tomsguide/trc/3/json
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false
  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
Twitter pixelTests whether the browser blocks the page from loading the tracker at https://t.co/i/adsct
  url: https://t.co/i/adsct passed: true,true,true,true,true
  url: https://t.co/i/adsct passed: true,true,true,true,true
  url: https://t.co/i/adsct passed: false,false,false,false,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: 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
  url: https://t.co/i/adsct passed: false,false,false,false,false
  url: https://t.co/i/adsct passed: false,false,false
Yandex AdsTests whether the browser blocks the page from loading the tracker at https://yandex.ru/ads/system/header-bidding.js
  url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: false
  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