Android Browsers


brave
1.41

bromite
102.0

chrome
103.0

duckduckgo
5.131

edge
103.0

firefox
103.2

focus
103.2

mull
101.1

opera
70.3

samsung
17.0

tor
99.0

vivaldi
5.3

yandex
22.7
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, 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: 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, 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: 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, Error: Unsupported result, different first party: h2, h2 unsupported: true, true passed: undefined test failed: false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; 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
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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e result, different first party: Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch, Error: Failed to fetch unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 result, different first party: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b result, different first party: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: bde939e6-7503-42f5-8ede-5c5e7da481f0, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false passed: true, true test failed: false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f 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: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
BroadcastChannelA BroadcastChannel is designed to send messages between tabs. In some browsers it can be used for cross-site communication and tracking.
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e 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: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 result, different first party: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 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: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a 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: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 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: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 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: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 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: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b 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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 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: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 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: 345160a2-d471-435a-8faf-6d786f0135bc, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false passed: true, true test failed: false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f 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: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
CacheStorageThe Cache API is a content storage mechanism originally introduced to support ServiceWorkers. If the same Cache object is accessible to multiple websites, it can be abused to track users.
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 4b7ace19-fd91-41eb-8c58-0feb1062e9f0, 4b7ace19-fd91-41eb-8c58-0feb1062e9f0, 4b7ace19-fd91-41eb-8c58-0feb1062e9f0, 4b7ace19-fd91-41eb-8c58-0feb1062e9f0, 4b7ace19-fd91-41eb-8c58-0feb1062e9f0 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac result, different first party: ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac, ae3a5c11-9564-4c12-8aa3-be101efafcac 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d result, different first party: 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d, 15266b11-0e1e-403f-a042-cffdd1cac15d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f result, different first party: a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f, a31f292d-e51f-4b73-9a44-c3f7cc814f0f 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: fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c result, different first party: fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c, fdf85031-7ac8-493f-a360-d445972cec4c 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., Error: The operation is insecure. result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true passed: undefined test failed: false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e result, different first party: 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e, 50cf7e85-4ac9-44a2-be56-3cd7acd17d5e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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, 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, fc6672b5-c2e0-40e1-bac8-008f561e753b, fc6672b5-c2e0-40e1-bac8-008f561e753b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
cookie (HTTP)The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them.
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3_http, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79_http, 9617dde9-ca7d-4361-bfab-6803c3e289a5_http, aea71795-4c4f-4f56-bb96-e6ea450996c9_http, cc8f914a-a17b-424b-81de-034d16db262e_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 827eefcf-e3a7-4015-807b-7dbb1ce9b006_http, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c_http, 793ef094-7fac-4cf2-9942-9ce01bd5e628_http, e605ff2c-16af-41fa-aab1-63fe8083a72d_http, fe00046c-f8ee-4b62-80fc-2a092d39ccd5_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637_http, d51ee07c-b965-4080-9b4d-15986381339e_http, 1ef01397-b72c-4c62-95a2-47f0490cba25_http, 5814e6b5-555d-4a07-a58d-4d733457088f_http, 468b5137-8d47-4cad-9681-2f9cba28598a_http result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637_http, d51ee07c-b965-4080-9b4d-15986381339e_http, 1ef01397-b72c-4c62-95a2-47f0490cba25_http, 5814e6b5-555d-4a07-a58d-4d733457088f_http, 468b5137-8d47-4cad-9681-2f9cba28598a_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 2e2b7b3c-4db5-4353-900c-9de90663227b_http, cde495c8-6ab6-4693-b36f-a42e9eed0b41_http, 9927ff42-3290-484a-ae48-fa5f2177034e_http, 571cae02-0b11-44fd-83af-510e51fd6d51_http, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c_http, 7463af0f-e2f9-4a65-abae-2c6bf42e5709_http, f37b4719-c439-49af-9dd6-5178751b542a_http, 24abc3a7-cb65-43c2-bfe5-06ea0456793f_http, dbc33d92-0f01-4e37-9edf-aa153d654582_http result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c_http, 7463af0f-e2f9-4a65-abae-2c6bf42e5709_http, f37b4719-c439-49af-9dd6-5178751b542a_http, 24abc3a7-cb65-43c2-bfe5-06ea0456793f_http, dbc33d92-0f01-4e37-9edf-aa153d654582_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: c0321bad-25dc-450e-958f-14f1caa4f72b_http, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7_http, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758_http, 075e6384-ef93-470f-965a-44bc84dd729f_http, cc779450-19d4-4a3a-b669-168bae587093_http result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b_http, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7_http, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758_http, 075e6384-ef93-470f-965a-44bc84dd729f_http, cc779450-19d4-4a3a-b669-168bae587093_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 39ce25fd-ab64-4573-9907-eb8c53ebca72_http, 75e6c57e-45d4-4831-bc36-51076398f95b_http, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7_http, 8c5307c0-6c94-4047-8b31-47c6897da9b2_http, d49acf31-e32a-4701-9cf6-896476ed088b_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c_http, 65e65dd7-5444-4c58-8094-a7f49c77a571_http, a6aa3b30-a6ac-479f-92e1-173a3c926e64_http, 711b6f13-ff12-44c4-a89f-c7574a46bea5_http, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 009f4f38-03cc-4f3b-8991-5f34a6690391_http, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21_http, 884d17b8-d311-4237-bad2-d2ec5421ffd6_http, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15_http, b0488469-ff80-42e0-9b66-012c4a866ae9_http result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391_http, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21_http, 884d17b8-d311-4237-bad2-d2ec5421ffd6_http, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15_http, b0488469-ff80-42e0-9b66-012c4a866ae9_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832_http, 294271d3-c756-4234-938e-b36f73dca609_http, 79491f78-91e2-4b21-b30f-4daf9e537959_http, f3e726cb-afe4-4b15-bced-a4dd639865d2_http, 358668f1-bc7b-4a8e-8f2c-3a4277748f70_http result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832_http, 294271d3-c756-4234-938e-b36f73dca609_http, 79491f78-91e2-4b21-b30f-4daf9e537959_http, f3e726cb-afe4-4b15-bced-a4dd639865d2_http, 358668f1-bc7b-4a8e-8f2c-3a4277748f70_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: bde939e6-7503-42f5-8ede-5c5e7da481f0_http, fad4796a-7849-49f3-a312-d9b843d4ff35_http result, different first party: , unsupported: false, false passed: true, true test failed: false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a_http, b8406463-d631-4d20-97a2-a02fede46239_http, 5a2c4649-d6fe-4da9-935e-16d77178e09b_http, 2b8337a7-66a8-4b7f-8d43-5489b700daf8_http, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f_http result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a_http, b8406463-d631-4d20-97a2-a02fede46239_http, 5a2c4649-d6fe-4da9-935e-16d77178e09b_http, 2b8337a7-66a8-4b7f-8d43-5489b700daf8_http, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=([\w-]+)/)[1]: null; } result, same first party: 013878ac-ad06-4dc3-a599-81acd7a7f301_http, 11925b0b-c72a-4e0a-956f-e528dc519528_http, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0_http, d38ed409-362a-492b-a553-0eb7c12d3f46_http, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b_http result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301_http, 11925b0b-c72a-4e0a-956f-e528dc519528_http, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0_http, d38ed409-362a-492b-a553-0eb7c12d3f46_http, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
cookie (JS)The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them.
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3_js, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79_js, 9617dde9-ca7d-4361-bfab-6803c3e289a5_js, aea71795-4c4f-4f56-bb96-e6ea450996c9_js, cc8f914a-a17b-424b-81de-034d16db262e_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 827eefcf-e3a7-4015-807b-7dbb1ce9b006_js, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c_js, 793ef094-7fac-4cf2-9942-9ce01bd5e628_js, e605ff2c-16af-41fa-aab1-63fe8083a72d_js, fe00046c-f8ee-4b62-80fc-2a092d39ccd5_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637_js, d51ee07c-b965-4080-9b4d-15986381339e_js, 1ef01397-b72c-4c62-95a2-47f0490cba25_js, 5814e6b5-555d-4a07-a58d-4d733457088f_js, 468b5137-8d47-4cad-9681-2f9cba28598a_js result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637_js, d51ee07c-b965-4080-9b4d-15986381339e_js, 1ef01397-b72c-4c62-95a2-47f0490cba25_js, 5814e6b5-555d-4a07-a58d-4d733457088f_js, 468b5137-8d47-4cad-9681-2f9cba28598a_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 2e2b7b3c-4db5-4353-900c-9de90663227b_js, cde495c8-6ab6-4693-b36f-a42e9eed0b41_js, 9927ff42-3290-484a-ae48-fa5f2177034e_js, 571cae02-0b11-44fd-83af-510e51fd6d51_js, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c_js, 7463af0f-e2f9-4a65-abae-2c6bf42e5709_js, f37b4719-c439-49af-9dd6-5178751b542a_js, 24abc3a7-cb65-43c2-bfe5-06ea0456793f_js, dbc33d92-0f01-4e37-9edf-aa153d654582_js result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c_js, 7463af0f-e2f9-4a65-abae-2c6bf42e5709_js, f37b4719-c439-49af-9dd6-5178751b542a_js, 24abc3a7-cb65-43c2-bfe5-06ea0456793f_js, dbc33d92-0f01-4e37-9edf-aa153d654582_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: c0321bad-25dc-450e-958f-14f1caa4f72b_js, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7_js, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758_js, 075e6384-ef93-470f-965a-44bc84dd729f_js, cc779450-19d4-4a3a-b669-168bae587093_js result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b_js, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7_js, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758_js, 075e6384-ef93-470f-965a-44bc84dd729f_js, cc779450-19d4-4a3a-b669-168bae587093_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 39ce25fd-ab64-4573-9907-eb8c53ebca72_js, 75e6c57e-45d4-4831-bc36-51076398f95b_js, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7_js, 8c5307c0-6c94-4047-8b31-47c6897da9b2_js, d49acf31-e32a-4701-9cf6-896476ed088b_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c_js, 65e65dd7-5444-4c58-8094-a7f49c77a571_js, a6aa3b30-a6ac-479f-92e1-173a3c926e64_js, 711b6f13-ff12-44c4-a89f-c7574a46bea5_js, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 009f4f38-03cc-4f3b-8991-5f34a6690391_js, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21_js, 884d17b8-d311-4237-bad2-d2ec5421ffd6_js, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15_js, b0488469-ff80-42e0-9b66-012c4a866ae9_js result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391_js, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21_js, 884d17b8-d311-4237-bad2-d2ec5421ffd6_js, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15_js, b0488469-ff80-42e0-9b66-012c4a866ae9_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832_js, 294271d3-c756-4234-938e-b36f73dca609_js, 79491f78-91e2-4b21-b30f-4daf9e537959_js, f3e726cb-afe4-4b15-bced-a4dd639865d2_js, 358668f1-bc7b-4a8e-8f2c-3a4277748f70_js result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832_js, 294271d3-c756-4234-938e-b36f73dca609_js, 79491f78-91e2-4b21-b30f-4daf9e537959_js, f3e726cb-afe4-4b15-bced-a4dd639865d2_js, 358668f1-bc7b-4a8e-8f2c-3a4277748f70_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: bde939e6-7503-42f5-8ede-5c5e7da481f0_js, fad4796a-7849-49f3-a312-d9b843d4ff35_js result, different first party: , unsupported: false, false passed: true, true test failed: false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a_js, b8406463-d631-4d20-97a2-a02fede46239_js, 5a2c4649-d6fe-4da9-935e-16d77178e09b_js, 2b8337a7-66a8-4b7f-8d43-5489b700daf8_js, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f_js result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a_js, b8406463-d631-4d20-97a2-a02fede46239_js, 5a2c4649-d6fe-4da9-935e-16d77178e09b_js, 2b8337a7-66a8-4b7f-8d43-5489b700daf8_js, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null result, same first party: 013878ac-ad06-4dc3-a599-81acd7a7f301_js, 11925b0b-c72a-4e0a-956f-e528dc519528_js, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0_js, d38ed409-362a-492b-a553-0eb7c12d3f46_js, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b_js result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301_js, 11925b0b-c72a-4e0a-956f-e528dc519528_js, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0_js, d38ed409-362a-492b-a553-0eb7c12d3f46_js, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
CookieStoreThe Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers.
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported, Error: Unsupported unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: Error: Unsupported, Error: Unsupported result, different first party: Error: Unsupported, Error: Unsupported unsupported: true, true passed: undefined test failed: false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (data) => { const msPerHour = 60 * 60 * 1000; if (!window.cookieStore) { throw new Error("Unsupported"); } window.cookieStore.set({ name: "partition_test", value: data, expires: Date.now() + msPerHour, sameSite: "none" }); } read: async () => { if (!window.cookieStore) { throw new Error("Unsupported"); } const cookie = await window.cookieStore.get("partition_test"); if (!cookie) { return null; } return cookie.value; } result, same first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
CSS cacheCSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites.
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_12200168482522322, fake_024934994862863435, fake_035262239072055834, fake_46482568741742347, fake_5220079191167464 result, different first party: fake_9878379655126244, fake_08850549727668322, fake_019990098983982074, fake_2390551934118128, fake_1689716073762091 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_7731773031351101, fake_4303312955623655, fake_07345339331596556, fake_8993411785284107, fake_1635971171175854 result, different first party: fake_7731773031351101, fake_4303312955623655, fake_07345339331596556, fake_8516246299014252, fake_1635971171175854 unsupported: false, false, false, false, false passed: false, false, false, true, false test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_7154367803340633, fake_36105530423560483, fake_6046024488979482, fake_6310216560588904, fake_4499137181055013 result, different first party: fake_5101055244215538, fake_21150993223583447, fake_45566509304009495, fake_007859211036135738, fake_6755320866379237 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_5982449737650479, fake_09860122791975479, fake_23519429386677104, fake_38480630868235277, fake_7163830892310825 result, different first party: fake_5982449737650479, fake_09860122791975479, fake_23519429386677104, fake_38480630868235277, fake_7163830892310825 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_07250008469227143, fake_391042150893383, fake_06069424580388061, fake_9846280771806211, fake_5281388409387169 result, different first party: fake_14912357972361168, fake_3436105352618386, fake_0176134542508124, fake_22911474211646965, fake_5497141100277974 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_2808865988882774, fake_392075249437539, fake_5198388848126962, fake_5889360831596204, fake_4649813352121832 result, different first party: fake_6924515076829474, fake_2575972773666144, fake_8891289417958492, fake_7664167515080056, fake_46332690382798436 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_3513698989535472, fake_41949633911159934, fake_16832594210931706, fake_980463896811008, fake_4690697973330953 result, different first party: fake_41485885035183445, fake_09481097435790331, fake_5945394837204137, fake_14599743842737256, fake_491269842123196 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_4903091027799571, fake_9305414787426758, fake_6382732362197823, fake_7525840383240683, fake_4557840227681831 result, different first party: fake_1360094810482806, fake_7067705951794754, fake_12413299470075123, fake_7965859270245179, fake_0932507108015288 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_6370572433013504, fake_3967106838087364, fake_5588595017506173, fake_47285515981413107, fake_291952221016756 result, different first party: fake_6370572433013504, fake_3967106838087364, fake_5588595017506173, fake_47285515981413107, fake_291952221016756 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_9782671130016596, fake_7940502425946967, fake_10886442754416659, fake_6407199448990097, fake_4718001816054924 result, different first party: fake_9782671130016596, fake_7940502425946967, fake_10886442754416659, fake_6407199448990097, fake_4718001816054924 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_4597861200188653, fake_6320270713510232 result, different first party: fake_5494636078301531, fake_8339550458388663 unsupported: false, false passed: true, true test failed: false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_596218308000422, fake_2704584389233724, fake_47026715744192504, fake_9199808197925219, fake_7738882292656177 result, different first party: fake_056892020883784644, fake_9202223570304013, fake_8949373322139555, fake_8130500161738381, fake_5862873197463927 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_011279805626206674, fake_7795385315436192, fake_7953764097086014, fake_13433984593224713, fake_3720932695607857 result, different first party: fake_2729575930942427, fake_7795385315436192, fake_6546014153899258, fake_9328058265308805, fake_32616697388977567 unsupported: false, false, false, false, false passed: true, false, true, true, true test failed: false, false, false, false, false
favicon cacheA favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites.
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 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, 1 result, different first party: 1, 1 unsupported: false, false passed: false, false test failed: false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
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, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
font cacheWeb fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking.
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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: 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, 1, 1, 2, 1 unsupported: false, false, false, false, false passed: true, false, false, true, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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, 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 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, 2, 2, 2 unsupported: false, false, false, false, false passed: true, false, true, true, true test failed: false, false, false, false, false
H1 connectionHTTP/1.x are the classic web connection protocols. If these connections are re-used across websites, they can be used to track users.
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: bde939e6-7503-42f5-8ede-5c5e7da481f0, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: , unsupported: false, false passed: true, true test failed: false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
H2 connectionHTTP/2 is a web connection protocol introduced in 2015. Some browsers re-use HTTP/2 connections across websites and can thus be used to track users.
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: bde939e6-7503-42f5-8ede-5c5e7da481f0, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: , unsupported: false, false passed: true, true test failed: false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
H3 connectionHTTP/3 is a new standard HTTP connection protocol, still in draft but widely supported by browsers. If it is not partitioned, it can be used to track users across websites.
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.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: 2e76828f1e74b0019de929f5b6d21b58, cf20e29ec737a12c40402ddff1ec08ae, 9a03bbee38d6d403594b5b7be191dda1, 1d19dcd0e4107399d771f9e8fb692435, 5c9e1a44a10751eafc5f900226e83704 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: 1856d4e3571bf9ac303fd9d133a27e43, 49b8530de4a63396c43026819d65297d, 6e8f5d4d659f0c1a0b210c40cc1ef4f8, eccdc18df17735cf949b8590b5f9d665, f8c13864580241154726f4ff6ef3d8cf 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: b461909bc0b650fa6aff1d2f1a2291d6, 6f43b06fd682f2773f9864b32d5e6a44, 54bba70e3d9a37590e9622ae5133ef3b, 0c2439f8d2042021e8dec8dda217949b, 5ab98e32d76c8abc240c91583b9bf141 result, different first party: b461909bc0b650fa6aff1d2f1a2291d6, 6f43b06fd682f2773f9864b32d5e6a44, 54bba70e3d9a37590e9622ae5133ef3b, 0c2439f8d2042021e8dec8dda217949b, 5ab98e32d76c8abc240c91583b9bf141 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: bb33325a6fca5f77ec47847eb4ab1724, 417c8752ef3f9e7d6a7234c1dc766208, 6550636a3bcaa2131a315e794bcc5c41, 9dfa6a9d98bb6bc2f15f1a5c970a1b85, 08195812fb11139a99bb6142f82267e2 result, different first party: bb33325a6fca5f77ec47847eb4ab1724, 417c8752ef3f9e7d6a7234c1dc766208, 6550636a3bcaa2131a315e794bcc5c41, 9dfa6a9d98bb6bc2f15f1a5c970a1b85, 08195812fb11139a99bb6142f82267e2 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: 2901e7d8cb6f3587c3120561f43e4daf, cac0037dcda027aa82ab9088af920c06, 419bada87ba806278b97111a24c1ca64, 6fdb82855ed7ecda568d47315c18b1d0, df1544422d168ae073cdedc2b0fc46ea result, different first party: 2901e7d8cb6f3587c3120561f43e4daf, cac0037dcda027aa82ab9088af920c06, 419bada87ba806278b97111a24c1ca64, 6fdb82855ed7ecda568d47315c18b1d0, df1544422d168ae073cdedc2b0fc46ea 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: af81766c93ace43c211036cb825d0d47, 6aa6878651059ffe14ed049597b08664, db4468a7f2e84f79ffb9daec553add9f, 20a1af64d86e267b996b9ce3a1777e64, e40b084fb66fb9dfd7e57c61c3ddc1f7 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: a3fee930b2585e5c497a566ce54571e5, 36b9e9c9b5689d291f762a805ed352f9, b89f6eb0d5a1675c918436f94f06e172, 23ca6ebb0c9dbeeb043c43d0d209338a, cc711a2287fa1dfddf22e78841614062 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: 0c769c7cfcd2bbfb1f8ad752716c76d0, 9e7eb3f3f1f03fb807507afa1364b517, bb11f49c9410146d830dec15055c2b89, 1c6e53c262b0e61587c8a6282ff137a3, 29d9e7623e7c110b5b90e055e4a14a57 result, different first party: 621fa250ff5aa9c07ac2e64f99d53c0b, 43f89795fd830e44357d20691c6590a5, ae479c32d16decc4168a0833b62052b1, b1eb290e5d129b2584317b6d18a71023, 3e3b67265a5dd71e3761e06b7bb07c13 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: 9826d438c2cfc83d66fe9c1c2428a8c3, 0d0be62fc8905d93abd31796f1bfec0a, 257670ff92b6c3a6194b81c24d2070ed, 5d453e12a6b8a5c63133c55501bc481a, ebe514a61ae0ea38a2137aec30b9839c result, different first party: 9826d438c2cfc83d66fe9c1c2428a8c3, 0d0be62fc8905d93abd31796f1bfec0a, 257670ff92b6c3a6194b81c24d2070ed, 5d453e12a6b8a5c63133c55501bc481a, ebe514a61ae0ea38a2137aec30b9839c 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, true passed: undefined test failed: false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.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: 1d490b7e162c4652b430e81776756ca3, 6c60fccd8295b8194a201a258aabf78a, c5d443946484e5dff43c1f9b03933d3a, c9c39c1f2a7ae7baf479e164d5a77d26, 8e2cf68ee42f59a786aa783a5598aad4 result, different first party: 1d490b7e162c4652b430e81776756ca3, 6c60fccd8295b8194a201a258aabf78a, c5d443946484e5dff43c1f9b03933d3a, c9c39c1f2a7ae7baf479e164d5a77d26, 8e2cf68ee42f59a786aa783a5598aad4 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: bfd56f7afb5721dc094224037e0d491e, bb703c86b604d680718d7779184d7043, b6d8adb7a9a6f1fb35f65f02705a38ac, fda92f800f4579295827800078442192, aa98a40a71ae5dad661dd296bb9ee237 result, different first party: bfd56f7afb5721dc094224037e0d491e, bb703c86b604d680718d7779184d7043, b6d8adb7a9a6f1fb35f65f02705a38ac, fda92f800f4579295827800078442192, aa98a40a71ae5dad661dd296bb9ee237 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
HSTS cacheThe HTTP Strict-Transport-Security response header allows a website to signal that it should only be accessed via HTTPS. The browser remembers this directive in a database, but if this database is not partitioned, then it can be used to track users across websites."
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: 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: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: null read: null result, same first party: , not tested result, different first party: HTTPS used by default; no HSTS cache issue expected, Used http unsupported: , false passed: true, true test failed: false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
iframe cacheAn iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 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, 2, 1, 1, 1 result, different first party: 2, 3, 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, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
image cacheCaching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 2, 2, 2 unsupported: false, false, false, false, false passed: true, false, true, true, true test failed: false, false, false, false, false
indexedDBThe IndexedDB API exposes a transactional database to web pages. That database can be used to track users across websites, unless it is partitioned.
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e 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: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 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: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a 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: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 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: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 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: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 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: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 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. result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true passed: undefined test failed: false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f 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: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
localStorageThe localStorage API gives websites access to a key-value database that will remain available across visits. If the localStorage API is not partitioned or blocked, it can also be used to track users across websites.
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e 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: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 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: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a 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: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 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: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 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: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 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: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b 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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 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: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 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: bde939e6-7503-42f5-8ede-5c5e7da481f0, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false passed: true, true test failed: false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f 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: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
locksnavigator.locks (only supported in some browsers) allows scripts on multiple tabs to coordinate. If this API is not partitioned, it can be used for cross-site tracking.
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e 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: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 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: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a 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: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 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: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 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: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 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: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b 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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 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: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 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: 345160a2-d471-435a-8faf-6d786f0135bc, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: Error: LockManager.query: query() is not allowed in this context, Error: LockManager.query: query() is not allowed in this context unsupported: false, false passed: true, true test failed: false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f 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: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
prefetch cacheA suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites.
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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: 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, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 2, 2, 2 unsupported: false, false, false, false, false passed: true, false, true, true, true test failed: false, false, false, false, false
ServiceWorkerThe ServiceWorker API allows websites to run code in the background and store content in the browser for offline use. If a ServiceWorker can be accessed from multiple websites, it can be abused to track users across sites.
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: Error: Failed to register a ServiceWorker for scope ('https://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: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: Error: Failed to register a ServiceWorker for scope ('https://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: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true passed: undefined test failed: false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { console.log("trying to register the serviceworker now..."); const registration = await Promise.race([ navigator.serviceWorker.register('serviceWorker.js'), sleepMs(500) ]); if (registration === undefined) { // We timed out or otherwise failed. throw new Error("ServiceWorker registration failed"); } console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> , <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.18.0 (Ubuntu)</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> result, different first party: , 11925b0b-c72a-4e0a-956f-e528dc519528, , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
SharedWorkerThe SharedWorker API allows scripts from multiple tabs to share a background thread of computation. If SharedWorker is not partitioned, then it can be abused to shared data between websites in your browser.
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b result, different first party: none, none, none, none, none unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 result, different first party: none, none, Error: no SharedWorker message received, none, none unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: bde939e6-7503-42f5-8ede-5c5e7da481f0, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false passed: true, true test failed: false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); // console.log("worker", worker); const messagePromise = new Promise((resolve) => { worker.port.onmessage = (e) => resolve(e.data); }); worker.port.postMessage(secret); await messagePromise; } catch (e) { throw new Error("Unsupported"); } } read: async () => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); const messagePromise = new Promise((resolve, reject) => { worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject(new Error("no SharedWorker message received")), 200); }); worker.port.postMessage("request"); return messagePromise; } result, same first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined result, different first party: Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined, Error: SharedWorker is not defined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
TLS Session IDThe TLS protocol is used by HTTPS to make connections secure. If the browser were to re-use a TLS session, then the session ID could be used to track users across websites.
  write: async () => { let results = await fetch("https://tls.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: 916b6ba368ff956fd562fde7407231d1511678867340a3155eaab9a2bc5e3ff0, 765c252c3dd18f23a568f6b5fb5b7190d01823aa42d84b8b0995900d3d2cb74d, 5acd1af6c462ef3d914cd19acead47c685f59444e003e98dd3c129226ee9fdd9, 217a2fad2d8245e9266a41bd950490a71e08a22f3e66bb0cd9dfbccde7f10f9c, 98a4964b10a351116fd2954dd3e6a54298b1b3c1252265d640005d878c197d61 result, different first party: 3c37e22540f19846d7b8f0c72b1c6086f144449815b668fe9bad5dd30f853096, a7db2497e24d99325b072bfc15edfd4e7ed7a69a6e23a857d0ec84b8c6f6824f, fecbd65bc167159b4e24550eab5ec6ec12cef1c6232028f2f19da7bf72f876f6, 97d6d4e9bd6bdc8e82a16a5e323bc90c5204777979bf29fddd1e9cad8990fb8d, d1e9f4353b5958e9eaceb9179c80f59362eb5c2955b94894d40b88643c6752be 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: 2e930a33b0c22c5715bd97e66332e3a10ded1d855a4485bfe77ba0b5d93af0d7, f2cfbeb5be691f6444e581473d65ff9e2923d82862176a1f727202438f925b71, dab5bd5405e028363266f1818b6595fe6cfd04d15ab67515a3359a79afbdc877, 120d8cb68119a5b61969d5934ab971ca3cb24eae3130bd69f28ea812908d2573, b7942fc0554d10758b598bb81be69c07deabc90fbff90859bbcee820201a827a result, different first party: b48338f2057daa272380d028e3dd850095e2421aaeae043ae4f66faa6fd21c47, aa19e57dfbf6e77e705fc697fe4a5a8810866cb1cb97585c172c8e4e02acb242, 1d041e3210343e67d0b179a8dee516979cffadcb3bc075c87dbdbaf655ea6d9a, 95c40387680e5b855c648f284c6bf6abee635a4b07171cd257e3ce0c61117f00, 1119d470420bb70887e0a7de5edf7928488dbd8f6ac2ffdb137131e56531b2dc 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: f6b1227d105a3c1ad91b416a0f040a8e3ce161b2874a539d5c525a52272b5fa8, 81fce8680533cfe04ab61cad8e44ad77eed4471af49988eaa0498a4ace423336, f0baeea5f07400c6d5bc9c6d808b14f5cb63e467603c199c35b1d6f9f73f7134, 7eccab8b7c1562d8e5ec1f72119df43ec8a077fda0fb4659ce53433e524f99fa, c0680869ddda3f1ab0096c0709c9752f305e96f91db8285fa0f3483231504cd2 result, different first party: 9e2be49d5183f811b358efbf94e4ac41329ce67541d38bd38caff823ee41cf87, 115872648ebbdb7a83baaf8ee2b14a796f1b60adf3457ac79018f96c5807969d, 6ae2552588005a5ed22f309ee124815bca3f320232a511a4d316e7a4a57681bb, c3aea61975db29e5087b2f5fc7f70d77a078614dbbcc0c1b29de9178e4fc2365, 20bdbca422a4fe723e67fa909ed4e34b3cbe66256059c9c48db3076446d5678b 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: f6af4ecaca24b4d2a9b7d73ad856259006bb2d22a9813c71ddd68b6daae6241b, 66975e16dd04238de481d083b169d65cf87a48ad270805b0d45aa871e6bb90a7, 46ef7481d5bb3455c61080928da3923518033d48b0613bfa1c0d1812e5b5e984, e7cd7e530cddacae44c83c5797e22258d80e58cbc75ce53544873118154e9079, 464617b9481127b3a613ae02b9caeadd927d7752467cade0e9676ebb0af031c4 result, different first party: 969b1746275e8455d9affbed2c68e09dc8341dedb7311783ee6db747e7b777a6, 47c177cbe5b734552af25eb6ca3056bfb21f6a29feaf5e4dfc67c9b8ddec1a2c, 522c1d2bfde8821fd0dd5caef7c35a7f34617fd25e356483a507c1c2e4e7ca07, 8c537ab6f98e2b6b32675b434824c30328828723d992983e08789478e8cb059e, c308e0829234f25c3fda0c13f9fec79b35b6fa518a57ce331b04524d52b544e8 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: 96003187c16046b146dfe2eb033bf5d6300a584f75ef4c47267960ded25b51c2, cbbc1c8915a63aa301c7e49d43ec4cdb61f3dd46c5105d9b3169f17c0440cc21, e90f121ff14492ee58ac78997c8d430ef1e75b1980dacfa77112d48dbb343716, 8ad9ee68f65dc2beaec86978685ff0dbc986a086daad2991d6a39dc3a8833f79, 935df1936a690eeef467bdbb7bcb2da09e041afbf548687a0c53af3c09052ef0 result, different first party: 2048e33b79e45ac3e53364ecc3317b50016ea1145c78f8396088b9c0bf37f3dd, a9a3a8473e4e58a44a34da95d338a5da3cce97b7e896ef6de90b702b3c793d8e, 24c59193ba866ba9162b3c9a7ef5110da87fdf389e93264e9c2515e994e0accc, d9b51b35a667e8df96af853a8a1d8ccedd0343f26abc84e508595959507726de, 9f8896846b8f8e5450e82944a0022c92abfecc77001361dc40d7f115f00dc462 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: a6d6a98425b98144a591ed69a777799c3055d6256249d69c2875d06ea69e827a, 04944e1b60dc8aba6ea00633d922407116f755305f749606078a566665bb4a8b, ac84f15f73f12c297b3c485a78657ccf3a0f5f7464be059edb4abbee986eab60, 163c9d3e3a4ca80dfe69e3aec8a6246756b4aa2ed45d38fa560dafeafaee9980, f32ef82f5f6f0b88775a3d8b334c3af596bdbac3db3d75f2a78a963bcbfc27cb result, different first party: 2f8929af733b178c830d26551b90ff00f397c0230ef5ef6a821dbbc5d1ced2ca, 2d3aab228328326e7ce0f40c16531010fac19e2d24bd7a80a41328d3dd3e7351, faeda46ac8eee6ef47cd61d917ec261988eac47665220b5d5d6462ac625da286, e32a27904877b3fd0c2f4c3a709da09806f07961cabd9c5641658b9963f6b803, 5c9eb282801d20d36225537412d15f7cca5757f3cac7ea367797f311d2e03ff2 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: 438e41626bef1e1d70b71922084fbcacde78991318a0c7ca690fe65961d0f634, a2099c83462f2d760a5438c56c13320c6b17ddb9c7d67b486dcd0d8acea46a8b, 2579417e801d951d7c123d9d899554ff9e058d5496708502b7baf8151af9bcc0, d3d3738d1b3d2be298960e61699f8367498073480ea51cfbeec4920fc195253b, b2c10a3f0ca99b205c84d54f03c169d7d19c9fcc182dd9c08745729b1fc51697 result, different first party: 2cb9dbee7ac46f21cfcd978b91dd3963370e3dd78e9439e1d6b4ab0bf3afc9ef, a4662153ae0825a94966088db510923fb7c6e0269c7608df21795157058f9178, 6066560da18a19cd7269728df64e22aa7598081681f4ef4d85f7eca19582e201, a193ea93dd91590f0520789b88d3bc3ce25244376d06fd0611e0bab3ccab76da, 5daf3a13e16d5402ff8b892e11051de82a5e70365f2a55279a756902a5b0d7a2 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: 66722136b5da75ddd5a113a8d5f5db934d23eac638e188092a8efed1062d11c2, 6aabc2de85856146ef13dfd0ea704b8dabf7106c1d3b935e621450113b3bb2f8, b8767ec27a4933312abcd73b33ebe1ef57d127a914952e243377b040bf8d5cd4, 3b6bf54214676534b983191eb85c7d94c842adc3e6d703f1472cb6a44a1986f0, 1a4b647639fd7bc8a5b69941f045f90720f8958e9c9b56edad599d600ae7a4dd result, different first party: 7cea90f533d55531d377e535d4b74b43a6157a1b4c5527e4682404c71f19924a, d39bfd95241c5ecd89ea03ea58c7c2f6c058caa30862db20b0238cac0eff2fd9, 585cb91ad4cf025b384a42ae2f5e6732074330365b146f9809034b193219c29a, 7186aa27d0e4c97ee5b48d6e6654597604fd9e716594a65fa1e76cd7b00c5467, 799f23e3496ad6de892842f72f51512b53057cfff459d3b2972133fd0f33a11d 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: ab3bc6234a1b8b8511534409d3384c61104f9948e76ee062027960c50034e7a7, d6f98af3d335e7d33a150cbebb96b49b6ab92ba9515c4e827653de474447bb1e, 222e5045e43a15036a8dbd2285bb127adc126ac4a1c964a420312aa249452216, 6f43fc623ef753d0ef7811899f4d230e04511bc89885020775b5e3ba461cfbd0, ba5a1df0e48e018d5abd02e0958ab886dc2be631e3562d7791974f907229dec4 result, different first party: 862f62bd913240eac9632938f7a7ff59c38fe392c6b98426b632537f35609702, c5a84ab512ca9a5c449b02366d7ad6bdb87587e8d33635812199cd2da750a7d5, 4d1c5e6135961193405230b6322c759fd96d547d5a0ffb5bd16e0bbca55fe47d, 83ab15e6621f9e912079eebc5f9d6790a888881d72cbc1d2c43a9aa740291777, cb89b2abe13e7b8fec15fb7bea643501942d0af4110606b827caa92b4f3f8659 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: 6796c1e7eabf81953cdb3f17105cb9a05c954c604cdfdb2688a8f526a4fac4d7, 43b285457dd55f2f787fc689ae64a552097857334f4ea3ef7a113d6f8c42b888, b61f94e17958c35c81b190e1f7664b7c3f64c9857e30e148497b7ea5c97b62bb, f73864220c5f6aac291ffc9f16b2afca8876d617f3f388e61974e3f907f9e55a, 02fd60d37fe99278d69c671cf3f9244aaa35e71b3d9efed10018377c6bf1156b result, different first party: 5be3d4c87f53e455c898094b46a9f284f39cc28405d3624f03378965dec499a9, 1f96a9740311ed34806ca881209f1d901d7c155025026cd57cf905327bc4b7e1, d799e8fef2619344f2b9df4ea4cb7c25b82371eda225dafa389574a762dae1e9, 9380e3114ef432be0d38897846072bc1d595fe9385b7187560e70608fd58a38e, f290bdae2b187b6e213175745040a18acb7d327343316d8b7074ba002fcb1233 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: 0bb053521f71895c11bd2a5834a88ae2091297881b50166144a63e55285baa74, 981d7c14de88a7e52d985ac143a9c5344755eb0dad45e09461edb81aef514512 result, different first party: fcaf0c1b851bd59ced8d70c5c76bb9b0ad3be44c8b5dbee113f92b74a39314a1, 140a861f0c7f37d881fac717c6f2d83ecc38793a8f88a0702aba2270ef1fcced unsupported: false, false passed: true, true test failed: 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: 5a155241bb1880c16497d809241f5b35e86de4b39d31d1b5c1c7c8bc20fa6c11, 0e271de1976a7b32a625c843213feb98673a6feb348ab89be78c3bbd445359cc, 9a07a73dbc521790085a32ed928fdcfd1d9588766c9e072f6a77a00fa2d12e99, a6b2dd75644329906545b6d2ecc13cf6ab2abfbb3de5af816025d320ff19e27f, e348b9fdd39f63858adee5a0fd0c16a5dc5b4d48a9eb58dd91a168f75ce91a7b result, different first party: 9256973bd2df0b304f4bdf884a55096c528ef0d07cc3632c114957f76bb55f2a, f32b75fabe4d83b29bac51f94e133ffe45676ee67b68901828ec38854b1a7184, 255f868f896ff2fba5fb49a68baa2783a6d2e3a9bb95fd21835194738c1f39d6, 15153f124748d81d0d76b20deb4f4f219c153718e16c0bfd300960216ec8c978, 29dcfc11b69fbd235c2c5140f795a817c67f12a3bc7c91f2ce19f6215a6dbf79 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: 369638b206d01089ee9ce4f1b50fd81d09ba5a1d147503cb0a0ba99a2652e4cc, 150323b18d34ad671455514049a798d8f1af82d3c4a4e39aa6b2f9dc272bf9a6, ec24d0a6082e2a3a2973720d470134bd62e9d29cadac105d98bdbde5263cd9cf, 3193be9903fb59c3a159bb578dcc59064faca79c1b1c631a722f92969a20c634, a3457872b9fe322f264fe90a0e260dc902b7b2530e180965f13fece1571f6a71 result, different first party: 3ae51e22767e4584c1891102a8f8e4db650b12075bbe6a08ebef9eedadfde2f5, 77c0572fb59019a38bd21159edbe75ae44e73f5c81ac65a057ba474f242bd550, 39d924f2d4ed3901502650009b88c303559c776d61675b370a91047a9ab8dcc4, 2f58a48d29d4975ba39b17593b5cccb6e302721c080ad14dbcb54c05b7aa0f70, ee156eb78a010d1980331275d6a57266680c9e83ddb54a8be8fb77f8dc530bd5 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
Web SQL DatabaseThe Web SQL Database is a deprecated web API for storing data in an SQL database.
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: false, false passed: undefined test failed: true, true
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("gported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
XMLHttpRequest cacheSimilar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack.
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 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, 2, 1, 1, 1 result, different first party: 2, 3, 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, 1 result, different first party: 2, 2 unsupported: false, false passed: true, true test failed: false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
Navigation 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer 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: () => document.referrer result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false passed: false, false test failed: false, false
  write: (secret) => { /* do nothing */ } read: () => document.referrer 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: () => document.referrer 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
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: 3295c815-523b-4bcb-864e-7371c1a1e1d3, 36eb3988-d6be-48c2-b2df-5e6bcf95fb79, 9617dde9-ca7d-4361-bfab-6803c3e289a5, aea71795-4c4f-4f56-bb96-e6ea450996c9, cc8f914a-a17b-424b-81de-034d16db262e 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: 827eefcf-e3a7-4015-807b-7dbb1ce9b006, 5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, 793ef094-7fac-4cf2-9942-9ce01bd5e628, e605ff2c-16af-41fa-aab1-63fe8083a72d, fe00046c-f8ee-4b62-80fc-2a092d39ccd5 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: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: 53f7f14b-78aa-4d46-9df3-e9134ad3d637, d51ee07c-b965-4080-9b4d-15986381339e, 1ef01397-b72c-4c62-95a2-47f0490cba25, 5814e6b5-555d-4a07-a58d-4d733457088f, 468b5137-8d47-4cad-9681-2f9cba28598a 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: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: 2e2b7b3c-4db5-4353-900c-9de90663227b, cde495c8-6ab6-4693-b36f-a42e9eed0b41, 9927ff42-3290-484a-ae48-fa5f2177034e, 571cae02-0b11-44fd-83af-510e51fd6d51, 19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 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: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, 7463af0f-e2f9-4a65-abae-2c6bf42e5709, f37b4719-c439-49af-9dd6-5178751b542a, 24abc3a7-cb65-43c2-bfe5-06ea0456793f, dbc33d92-0f01-4e37-9edf-aa153d654582 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: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 result, different first party: c0321bad-25dc-450e-958f-14f1caa4f72b, 28b6b132-1431-4bc2-9bcc-966fe75ce1a7, 93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, 075e6384-ef93-470f-965a-44bc84dd729f, cc779450-19d4-4a3a-b669-168bae587093 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: 39ce25fd-ab64-4573-9907-eb8c53ebca72, 75e6c57e-45d4-4831-bc36-51076398f95b, 2db5ea31-466b-45e1-bb36-bdbd1fe914a7, 8c5307c0-6c94-4047-8b31-47c6897da9b2, d49acf31-e32a-4701-9cf6-896476ed088b 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: 9b88b2b5-3a9d-4221-988f-b4a82af24a3c, 65e65dd7-5444-4c58-8094-a7f49c77a571, a6aa3b30-a6ac-479f-92e1-173a3c926e64, 711b6f13-ff12-44c4-a89f-c7574a46bea5, 4bac5b88-6b7b-4073-b15a-ede4ec8243a9 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: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: 009f4f38-03cc-4f3b-8991-5f34a6690391, 9a06faa2-ffc1-40f0-9a7c-ab597d304b21, 884d17b8-d311-4237-bad2-d2ec5421ffd6, 199f7345-2ac6-4da1-ad1d-6ff68fd07e15, b0488469-ff80-42e0-9b66-012c4a866ae9 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: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: 62e8a7cd-c9d9-466b-bda1-9c6c07d00832, 294271d3-c756-4234-938e-b36f73dca609, 79491f78-91e2-4b21-b30f-4daf9e537959, f3e726cb-afe4-4b15-bced-a4dd639865d2, 358668f1-bc7b-4a8e-8f2c-3a4277748f70 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: bde939e6-7503-42f5-8ede-5c5e7da481f0, fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: , unsupported: false, false passed: true, true test failed: false, false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: 248733b2-aa0a-4334-98a8-9c89c70b094a, b8406463-d631-4d20-97a2-a02fede46239, 5a2c4649-d6fe-4da9-935e-16d77178e09b, 2b8337a7-66a8-4b7f-8d43-5489b700daf8, f839d718-ba93-4ae5-8c4a-7354dbbd2f5f 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: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: 013878ac-ad06-4dc3-a599-81acd7a7f301, 11925b0b-c72a-4e0a-956f-e528dc519528, 59f52ac9-ba36-4cd2-9e77-94258d2e26b0, d38ed409-362a-492b-a553-0eb7c12d3f46, 4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
window.nameThe window.name API allows websites to store data that will persist after the user has navigated the tab to a different website. This mechanism could be partitioned so that data is not allowed to persist between websites.
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_3295c815-523b-4bcb-864e-7371c1a1e1d3, name_36eb3988-d6be-48c2-b2df-5e6bcf95fb79, name_9617dde9-ca7d-4361-bfab-6803c3e289a5, name_aea71795-4c4f-4f56-bb96-e6ea450996c9, name_cc8f914a-a17b-424b-81de-034d16db262e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_827eefcf-e3a7-4015-807b-7dbb1ce9b006, name_5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, name_793ef094-7fac-4cf2-9942-9ce01bd5e628, name_e605ff2c-16af-41fa-aab1-63fe8083a72d, name_fe00046c-f8ee-4b62-80fc-2a092d39ccd5 result, different first party: name_827eefcf-e3a7-4015-807b-7dbb1ce9b006, name_5c9d81ca-f7a2-454b-b6f4-8ac55b22a86c, name_793ef094-7fac-4cf2-9942-9ce01bd5e628, name_e605ff2c-16af-41fa-aab1-63fe8083a72d, name_fe00046c-f8ee-4b62-80fc-2a092d39ccd5 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_53f7f14b-78aa-4d46-9df3-e9134ad3d637, name_d51ee07c-b965-4080-9b4d-15986381339e, name_1ef01397-b72c-4c62-95a2-47f0490cba25, name_5814e6b5-555d-4a07-a58d-4d733457088f, name_468b5137-8d47-4cad-9681-2f9cba28598a result, different first party: name_53f7f14b-78aa-4d46-9df3-e9134ad3d637, name_d51ee07c-b965-4080-9b4d-15986381339e, name_1ef01397-b72c-4c62-95a2-47f0490cba25, name_5814e6b5-555d-4a07-a58d-4d733457088f, name_468b5137-8d47-4cad-9681-2f9cba28598a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_2e2b7b3c-4db5-4353-900c-9de90663227b, name_cde495c8-6ab6-4693-b36f-a42e9eed0b41, name_9927ff42-3290-484a-ae48-fa5f2177034e, name_571cae02-0b11-44fd-83af-510e51fd6d51, name_19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 result, different first party: name_2e2b7b3c-4db5-4353-900c-9de90663227b, name_cde495c8-6ab6-4693-b36f-a42e9eed0b41, name_9927ff42-3290-484a-ae48-fa5f2177034e, name_571cae02-0b11-44fd-83af-510e51fd6d51, name_19c4769f-8dd9-4df8-bd9a-15b2b3f7fb00 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, name_7463af0f-e2f9-4a65-abae-2c6bf42e5709, name_f37b4719-c439-49af-9dd6-5178751b542a, name_24abc3a7-cb65-43c2-bfe5-06ea0456793f, name_dbc33d92-0f01-4e37-9edf-aa153d654582 result, different first party: name_dbad1b14-7bcb-4fbf-a3c1-cb81fc49ce2c, name_7463af0f-e2f9-4a65-abae-2c6bf42e5709, name_f37b4719-c439-49af-9dd6-5178751b542a, name_24abc3a7-cb65-43c2-bfe5-06ea0456793f, name_dbc33d92-0f01-4e37-9edf-aa153d654582 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_c0321bad-25dc-450e-958f-14f1caa4f72b, name_28b6b132-1431-4bc2-9bcc-966fe75ce1a7, name_93590bd3-d8c0-4ef6-8ab3-2bdfc6eb0758, name_075e6384-ef93-470f-965a-44bc84dd729f, name_cc779450-19d4-4a3a-b669-168bae587093 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_39ce25fd-ab64-4573-9907-eb8c53ebca72, name_75e6c57e-45d4-4831-bc36-51076398f95b, name_2db5ea31-466b-45e1-bb36-bdbd1fe914a7, name_8c5307c0-6c94-4047-8b31-47c6897da9b2, name_d49acf31-e32a-4701-9cf6-896476ed088b result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_9b88b2b5-3a9d-4221-988f-b4a82af24a3c, name_65e65dd7-5444-4c58-8094-a7f49c77a571, name_a6aa3b30-a6ac-479f-92e1-173a3c926e64, name_711b6f13-ff12-44c4-a89f-c7574a46bea5, name_4bac5b88-6b7b-4073-b15a-ede4ec8243a9 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_009f4f38-03cc-4f3b-8991-5f34a6690391, name_9a06faa2-ffc1-40f0-9a7c-ab597d304b21, name_884d17b8-d311-4237-bad2-d2ec5421ffd6, name_199f7345-2ac6-4da1-ad1d-6ff68fd07e15, name_b0488469-ff80-42e0-9b66-012c4a866ae9 result, different first party: name_009f4f38-03cc-4f3b-8991-5f34a6690391, name_9a06faa2-ffc1-40f0-9a7c-ab597d304b21, name_884d17b8-d311-4237-bad2-d2ec5421ffd6, name_199f7345-2ac6-4da1-ad1d-6ff68fd07e15, name_b0488469-ff80-42e0-9b66-012c4a866ae9 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_62e8a7cd-c9d9-466b-bda1-9c6c07d00832, name_294271d3-c756-4234-938e-b36f73dca609, name_79491f78-91e2-4b21-b30f-4daf9e537959, name_f3e726cb-afe4-4b15-bced-a4dd639865d2, name_358668f1-bc7b-4a8e-8f2c-3a4277748f70 result, different first party: name_62e8a7cd-c9d9-466b-bda1-9c6c07d00832, name_294271d3-c756-4234-938e-b36f73dca609, name_79491f78-91e2-4b21-b30f-4daf9e537959, name_f3e726cb-afe4-4b15-bced-a4dd639865d2, name_358668f1-bc7b-4a8e-8f2c-3a4277748f70 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_bde939e6-7503-42f5-8ede-5c5e7da481f0, name_fad4796a-7849-49f3-a312-d9b843d4ff35 result, different first party: name_bde939e6-7503-42f5-8ede-5c5e7da481f0, name_fad4796a-7849-49f3-a312-d9b843d4ff35 unsupported: false, false passed: false, false test failed: false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_248733b2-aa0a-4334-98a8-9c89c70b094a, name_b8406463-d631-4d20-97a2-a02fede46239, name_5a2c4649-d6fe-4da9-935e-16d77178e09b, name_2b8337a7-66a8-4b7f-8d43-5489b700daf8, name_f839d718-ba93-4ae5-8c4a-7354dbbd2f5f result, different first party: name_248733b2-aa0a-4334-98a8-9c89c70b094a, name_b8406463-d631-4d20-97a2-a02fede46239, name_5a2c4649-d6fe-4da9-935e-16d77178e09b, name_2b8337a7-66a8-4b7f-8d43-5489b700daf8, name_f839d718-ba93-4ae5-8c4a-7354dbbd2f5f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => window.name = "name_" + secret read: () => window.name result, same first party: name_013878ac-ad06-4dc3-a599-81acd7a7f301, name_11925b0b-c72a-4e0a-956f-e528dc519528, name_59f52ac9-ba36-4cd2-9e77-94258d2e26b0, name_d38ed409-362a-492b-a553-0eb7c12d3f46, name_4b8776ec-b859-4d17-a4fa-7bdc611fbd1b result, different first party: name_013878ac-ad06-4dc3-a599-81acd7a7f301, name_11925b0b-c72a-4e0a-956f-e528dc519528, name_59f52ac9-ba36-4cd2-9e77-94258d2e26b0, name_d38ed409-362a-492b-a553-0eb7c12d3f46, name_4b8776ec-b859-4d17-a4fa-7bdc611fbd1b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, 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: true,true,true,true,true result: Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: true,false result: Insecure website never 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
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: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true passed: true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
Upgradable hyperlinkChecks to see if the user has clicked on a hyperlink to an insecure address, if the browser upgrades that address to HTTPS whenever possible.
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: 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: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true passed: true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
Upgradable imageChecks to see if the browser attempts to upgrade an insecure address for an image to HTTPS whenever possible.
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: false,false result: loaded insecurely,loaded insecurely
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
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: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true result: 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
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,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
GPC enabled third-partyThe Global Privacy Control is an HTTP header that can be sent by a browser to instruct a visited website not to sell the user's personal data to other parties. This test checks to see if the GPC header is sent to third-party elements on the web page.
  sec-gpc: 1 passed: true,true,true,true,true
  passed: false,false,false,false,false
  passed: false,false,false,false,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
  passed: false,false,false,false,false
  passed: false,false,false,false,false
IP address leakIP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address.
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: true,true
  passed: false,false,false,false,false
  passed: false,false,false,false,false
Stream isolationBrowsers that use Tor can use a different Tor circuit per top-level website.
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
  write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: false,false readSameFirstParty: 2a0b:f4c2:2::39,2a0b:f4c0:16c:6::1 readDifferentFirstParty: Error: Unsupported,2a03:4000:6:b628::2 passed: true,true testFailed: false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
Tor enabledThe Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default.
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: true,true passed: true,true
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
Fingerprinting resistance 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: 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: 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: 1524,1524 passed: false,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: 640,640,640,640,640 desired value: 1383,1383,1383,1383,1383 passed: false,false,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: 980,980 desired value: 980,980 passed: 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
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: 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: 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: 1524,1524 desired value: 1524,1524 passed: true,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: 508,508,508,508,508 desired value: 1383,1383,1383,1383,1383 passed: false,false,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: 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: 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: 1524,1524 desired value: 1524,1524 passed: true,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: 640,640,640,640,640 desired value: 1383,1383,1383,1383,1383 passed: false,false,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: 980,980 desired value: 980,980 passed: 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
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: 0,0 desired value: 0,0 passed: 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
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: 0,0 desired value: 0,0 passed: 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
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: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
__hsscHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
__hstcHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
__sDrip.com email address tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
_hsencHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
_openstatYandex tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
dclidDoubleClick Click ID (Google)
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
fbclidFacebook Click Identifier
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
gclidGoogle Click Identifier
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
hsCtaTrackingHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
igshidInstagram tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
mc_eidMailchimp Email ID (email recipient's address)
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
mkt_tokAdobe Marketo tracking parameter
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
ml_subscriberMailerLite email tracking
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
ml_subscriber_hashMailerLite email tracking
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
msclkidMicrosoft Click ID
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
oly_anon_idOmeda marketing 'anonymous' customer id
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
oly_enc_idOmeda marketing 'known' customer id
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
rb_clickidUnknown high-entropy tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
s_cidAdobe Site Catalyst tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
vero_convVero tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
vero_idVero tracking parameter
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
wickedidWicked Reports e-commerce tracking
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
yclidYandex Click ID
  passed: true,true,true,true,true
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false
  value: 29403442351900355 passed: false,false,false,false,false
  value: 29403442351900355 passed: false,false,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,false
  url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false,false
  url: https://munchkin.marketo.net/munchkin.js passed: false,false,false,false,false
Adobe Audience ManagerTests whether the browser blocks the page from loading the tracker at https://dpm.demdex.net/ibs
  url: https://dpm.demdex.net/ibs passed: true,true,true,true,true
  url: https://dpm.demdex.net/ibs passed: true,true,true,true,true
  url: https://dpm.demdex.net/ibs passed: false,false,false,false,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,false
  url: https://dpm.demdex.net/ibs passed: false,false,false,false,false
  url: https://dpm.demdex.net/ibs passed: false,false,false,false,false
Amazon adsystemTests whether the browser blocks the page from loading the tracker at https://s.amazon-adsystem.com/dcm
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: true,true,true,true,true
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
  url: https://s.amazon-adsystem.com/dcm passed: false,false,false,false,false
AppNexusTests whether the browser blocks the page from loading the tracker at https://ib.adnxs.com/px?id=178248&t=1
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: true,true,true,true,true
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
  url: https://ib.adnxs.com/px?id=178248&t=1 passed: false,false,false,false,false
Bing AdsTests whether the browser blocks the page from loading the tracker at https://bat.bing.com/bat.js
  url: https://bat.bing.com/bat.js passed: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: 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
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
  url: https://bat.bing.com/bat.js passed: false,false,false,false,false
ChartbeatTests whether the browser blocks the page from loading the tracker at https://static.chartbeat.com/js/chartbeat.js
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: true,true,true,true,true
  url: https://static.chartbeat.com/js/chartbeat.js passed: 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
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
  url: https://static.chartbeat.com/js/chartbeat.js passed: false,false,false,false,false
CriteoTests whether the browser blocks the page from loading the tracker at https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,true,true,true,true
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true,true,true,true,true
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false,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,false
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false,false
  url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false,false,false,false,false
DoubleClick (Google)Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
Facebook 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,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,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: 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
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
  url: https://www.google.com/pagead/1p-user-list/ passed: false,false,false,false,false
Google AnalyticsTests whether the browser blocks the page from loading the tracker at https://google-analytics.com/urchin.js
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,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: 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
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
Google Tag ManagerTests whether the browser blocks the page from loading the tracker at https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,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: 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
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,false
Index ExchangeTests whether the browser blocks the page from loading the tracker at https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
New RelicTests whether the browser blocks the page from loading the tracker at https://js-agent.newrelic.com/nr-1212.min.js
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,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,false
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,false
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,false
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,false
  url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false
  url: https://pixel.quantserve.com/pixel passed: false,false,false,false,false
Scorecard Research BeaconTests whether the browser blocks the page from loading the tracker at https://sb.scorecardresearch.com/internal-c2/default/cs.js
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,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,false
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,false
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,false
TaboolaTests whether the browser blocks the page from loading the tracker at https://trc.taboola.com/futureplc-tomsguide/trc/3/json
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true,true,true,true,true
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
  url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false,false,false,false,false
Twitter pixelTests whether the browser blocks the page from loading the tracker at https://t.co/i/adsct
  url: https://t.co/i/adsct passed: true,true,true,true,true
  url: https://t.co/i/adsct passed: true,true,true,true,true
  url: https://t.co/i/adsct passed: false,false,false,false,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: true,true,true,true,true
  url: https://t.co/i/adsct passed: false,false
  url: https://t.co/i/adsct passed: false,false,false,false,false
  url: https://t.co/i/adsct passed: false,false,false,false,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,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