Desktop private modes
(click anywhere for more info)


brave
1.35

private

chrome
98.0

private

edge
98.0

private

firefox
97.0

private

librewolf
97.0-2

private

opera
83.0

private

safari
15.2

private

tor
11.0

private

ungoogled
98.0

private

vivaldi
5.1

private
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 = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h2, h2, h2, h2, h2 result, different first party: h2, h2, h2, h2, h2 unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h2, h2, h2, h2 result, different first party: h2, h2, h2, h2 unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 result, different first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a result, different first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 result, different first party: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 result, different first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 result, different first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 result, different first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 result, different first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a result, different first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 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: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 result, different first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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: Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel result, different first party: Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel unsupported: true, true, true, true, true passed: undefined 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: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb 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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 result, different first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 result, different first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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
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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=(\S+)/)[1]: null; } result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7_http, 463516ab-2da6-4a94-948b-01ebcedd7f97_http, c4dc2170-539a-468a-80de-ee8a1411fb36_http, 4295a8e3-d552-4962-971c-8c26216b49f6_http, 9e350288-a5d3-4dcf-be61-ec6bf6be9311_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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=(\S+)/)[1]: null; } result, same first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239_http, 711efb50-0752-4543-95ab-0d2f31cca438_http, 049d83a1-1467-4385-b508-2775a6d361f8_http, a7fe466e-3752-426c-a506-791caf1095fa_http, 02fb9102-4068-46d9-b55d-1978990ca08a_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=(\S+)/)[1]: null; } result, same first party: 135f3504-0c04-49e7-b33d-559feee28769_http, ca3e039c-4bef-4a1e-86bf-8955abc2826d_http, 2d6cf32f-19c4-48ea-9669-0fdea5d22738_http, f241fad5-a666-48bc-a5c2-a7245927bc0d_http, 7c61338e-b316-4aaf-9a3d-578914a44205_http result, different first party: 135f3504-0c04-49e7-b33d-559feee28769_http, ca3e039c-4bef-4a1e-86bf-8955abc2826d_http, 2d6cf32f-19c4-48ea-9669-0fdea5d22738_http, f241fad5-a666-48bc-a5c2-a7245927bc0d_http, 7c61338e-b316-4aaf-9a3d-578914a44205_http unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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=(\S+)/)[1]: null; } result, same first party: bf7cd501-0e8a-48a2-a243-8225ff62d9d2_http, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834_http, 9cc8ba03-d91c-425e-8b20-cc86c8992d10_http, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa_http, 614e075d-1be8-464d-9109-4eed41c02b08_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=(\S+)/)[1]: null; } result, same first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541_http, 30091c84-e152-49c7-aa9b-53225fa48371_http, b88dbb38-750d-45c5-bb0e-4795035cef52_http, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf_http, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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=(\S+)/)[1]: null; } result, same first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a_http, 064802d4-62bd-434b-98bd-649945c96808_http, 50002401-70d9-4095-ae78-e38de0b8303f_http, c5d1d425-c506-4052-95a1-098b582c2e53_http, 75feed82-07f9-4603-a484-680f0ad2b385_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(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=(\S+)/)[1]: null; } result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5_http, f61bf081-46ae-4c0e-a4ed-818f2cf1796d_http, d58ee3fc-4d19-4f41-89ba-15067e6cf89e_http, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af_http, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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=(\S+)/)[1]: null; } result, same first party: 5e5a6377-ce85-4d1e-a662-65e303987e8f_http, ba21b00c-aa17-49bb-b1af-e1e0ef24c032_http, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e_http, a41850d5-9ca6-4869-8e79-83b023f34bf2_http result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${baseURI}cookie?secret=${secret}_http`); } read: async () => { // Test if we now send a requests with a 'cookie' header containing the secret. let response = await fetch(`${baseURI}headers`); let cookie = (await response.json())["cookie"]; return cookie ? cookie.match(/secret=(\S+)/)[1]: null; } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea_http, 53864373-cc65-450d-b82b-7cb0e2b81805_http, d18c2b33-e14a-418e-ab4a-1c01b59b4c74_http, 2ad2c3bb-c2ac-42f4-93d7-44097888156c_http, 0111081d-b827-49ca-afee-c2023918f9bb_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { // Request a page that will send an HTTPOnly 'set-cookie' response header with secret value. await fetch(`${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=(\S+)/)[1]: null; } result, same first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b_http, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d_http, 2a99a0e7-5010-4486-82af-ee53c543440a_http, fc1e9c12-0505-46df-a4ad-dcf3894da7e7_http, 68b212c5-041d-4d33-93fd-f8906e727f66_http result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true 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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7_js, 463516ab-2da6-4a94-948b-01ebcedd7f97_js, c4dc2170-539a-468a-80de-ee8a1411fb36_js, 4295a8e3-d552-4962-971c-8c26216b49f6_js, 9e350288-a5d3-4dcf-be61-ec6bf6be9311_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239_js, 711efb50-0752-4543-95ab-0d2f31cca438_js, 049d83a1-1467-4385-b508-2775a6d361f8_js, a7fe466e-3752-426c-a506-791caf1095fa_js, 02fb9102-4068-46d9-b55d-1978990ca08a_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 135f3504-0c04-49e7-b33d-559feee28769_js, ca3e039c-4bef-4a1e-86bf-8955abc2826d_js, 2d6cf32f-19c4-48ea-9669-0fdea5d22738_js, f241fad5-a666-48bc-a5c2-a7245927bc0d_js, 7c61338e-b316-4aaf-9a3d-578914a44205_js result, different first party: 135f3504-0c04-49e7-b33d-559feee28769_js, ca3e039c-4bef-4a1e-86bf-8955abc2826d_js, 2d6cf32f-19c4-48ea-9669-0fdea5d22738_js, f241fad5-a666-48bc-a5c2-a7245927bc0d_js, 7c61338e-b316-4aaf-9a3d-578914a44205_js unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: bf7cd501-0e8a-48a2-a243-8225ff62d9d2_js, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834_js, 9cc8ba03-d91c-425e-8b20-cc86c8992d10_js, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa_js, 614e075d-1be8-464d-9109-4eed41c02b08_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541_js, 30091c84-e152-49c7-aa9b-53225fa48371_js, b88dbb38-750d-45c5-bb0e-4795035cef52_js, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf_js, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a_js, 064802d4-62bd-434b-98bd-649945c96808_js, 50002401-70d9-4095-ae78-e38de0b8303f_js, c5d1d425-c506-4052-95a1-098b582c2e53_js, 75feed82-07f9-4603-a484-680f0ad2b385_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=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5_js, f61bf081-46ae-4c0e-a4ed-818f2cf1796d_js, d58ee3fc-4d19-4f41-89ba-15067e6cf89e_js, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af_js, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 5e5a6377-ce85-4d1e-a662-65e303987e8f_js, ba21b00c-aa17-49bb-b1af-e1e0ef24c032_js, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e_js, a41850d5-9ca6-4869-8e79-83b023f34bf2_js result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea_js, 53864373-cc65-450d-b82b-7cb0e2b81805_js, d18c2b33-e14a-418e-ab4a-1c01b59b4c74_js, 2ad2c3bb-c2ac-42f4-93d7-44097888156c_js, 0111081d-b827-49ca-afee-c2023918f9bb_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { document.cookie = `secret=${secret}_js; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b_js, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d_js, 2a99a0e7-5010-4486-82af-ee53c543440a_js, fc1e9c12-0505-46df-a4ad-dcf3894da7e7_js, 68b212c5-041d-4d33-93fd-f8906e727f66_js result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true 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 += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_9402653019723988, fake_9237389593975851, fake_9621766198914019, fake_7886158175089473, fake_5796928483594121 result, different first party: fake_8304561920233664, fake_41289240629121027, fake_7724028480639555, fake_2924735876647695, fake_8821576129418203 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_38000511358248623, fake_9535672664926316, fake_144135758792038, fake_6734850442003577, fake_13863405999976441 result, different first party: fake_3267899368749201, fake_7212835613133428, fake_7836339734116258, fake_4600496512274437, fake_1851330386069625 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_08764029558330066, fake_1378074002358758, fake_6783485267407994, fake_630928324434525, fake_3313953368146483 result, different first party: fake_08764029558330066, fake_1378074002358758, fake_6783485267407994, fake_630928324434525, fake_3313953368146483 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_4210725873413841, fake_820752476182067, fake_08810242271475799, fake_4081744089376367, fake_9481822377938156 result, different first party: fake_002007430065898985, fake_20420740679439353, fake_3387687729051696, fake_21324278330466018, fake_10982005035638642 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_18092592626267945, fake_37208372934412837, fake_43001052973599574, fake_5836343971328166, fake_04947176091820671 result, different first party: fake_9726461786297758, fake_5559984546206802, fake_06392207244618842, fake_2877605268869734, fake_0033566639243167717 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_2792448005231629, fake_8573444956495049, fake_26551746459552583, fake_055964927233869366, fake_6160979617177538 result, different first party: fake_02496994359393434, fake_1799455392666438, fake_03945281659649069, fake_8589383781922071, fake_827532194861325 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_18060006163992437, fake_5942494135239775, fake_6932842937780288, fake_3186850178472793, fake_40092472258762246 result, different first party: fake_3881352587221303, fake_4576034276631735, fake_3155562661097513, fake_31862405645814884, fake_9380606212716351 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_6203262589606, fake_9228467030260661, fake_9013556245718604, fake_5443407006970369 result, different first party: fake_24153545817639666, fake_8240600723586262, fake_1974052326672633, fake_7180847653006615 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_49156659482600706, fake_571349198705924, fake_5571881967212389, fake_6423549895253562, fake_7609089692668243 result, different first party: fake_6036298177925397, fake_7627144231592076, fake_3842050335287288, fake_6030073378818603, fake_014429416245021143 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return key; } read: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; const testElement = document.querySelector("#css"); let fontFamily; while (true) { await sleepMs(100); fontFamily = getComputedStyle(testElement).fontFamily; if (fontFamily.startsWith("fake")) { break; } } console.log(fontFamily); return fontFamily; } result, same first party: fake_8345457450139138, fake_8245636549728741, fake_540398408274354, fake_42975828852255193, fake_2581078804325485 result, different first party: fake_8655210589477502, fake_9643186343961554, fake_15320784618066297, fake_5109233542444025, fake_7064652521784944 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
favicon cacheA favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites.
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 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: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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: 2, 2, 2, 2, 2 result, different first party: 3, 3, 3, 3, 3 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: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
font cacheWeb fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking.
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 2, 1 result, different first party: 2, 2, 2, 3, 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: 2, 1, 1, 1, 1 result, different first party: 2, 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: 2, 1, 1, 1, 1 result, different first party: 3, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 2, 2, 2 result, different first party: 2, 2, 3, 3, 3 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
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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a result, different first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 result, different first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 result, different first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a result, different first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 result, different first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 result, different first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: ff90f0691057f322a5cd08c11a1befe4, f203f5bbfd7d32eef3fd1440df2e23b2, b305e02f62a87a6aa2a443d845d0f8c8, e8361f5118bbae064b3759529f0eda72, a24de2b8ce3af4be7960b767d6980af2 result, different first party: f02568e889f4670113a0e147e7cb009d, 6d9fbd07d6aa5ddce2be080d7a545405, 4cce73150d9569fbb6793bfadb307419, eef8e5b36f74e0595124bc37d5e065ef, 3d6b66f68c61e34bf2493c706dc3d484 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: 23ff342ccab3fa4f7ac2fb74e52446e7, 8098b097d7369ab27d0e47636e27b63f, c8e97b2f21d992e475331026d2aa2906, d20e1920e7100faf85800ab84e462b83, 888de3129e505d1ca7648fc38ee72cd9 result, different first party: 23ff342ccab3fa4f7ac2fb74e52446e7, 8098b097d7369ab27d0e47636e27b63f, c8e97b2f21d992e475331026d2aa2906, d20e1920e7100faf85800ab84e462b83, 888de3129e505d1ca7648fc38ee72cd9 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: 0165d34676a01137dc29ef7357671d66, cc7b0b3b1363ade793d94c65b9b029ca, ac693d591d63e39f03f2f73b4e4ee2fa, c14e46c3c491121bcb2008581bc670f9, dbde75058bf3005955aa712d73412146 result, different first party: 0165d34676a01137dc29ef7357671d66, cc7b0b3b1363ade793d94c65b9b029ca, ac693d591d63e39f03f2f73b4e4ee2fa, c14e46c3c491121bcb2008581bc670f9, dbde75058bf3005955aa712d73412146 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: c50413580bf2e2409d60000616860699, 342532ff08bc99f8433fa6af68f15b99, fea0352c9ab33a3d5a498676737a27ae, 00eb8c5a4a9674a57dcf4d135054ba75, 3cd3066f3ffab77f08b4a81255c383a6 result, different first party: , , , , c4a1e2a15762584d3f27f5b7cc02e7fd 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: 702d179ed6f7e2a378c037ccbdf26185, 6cf05fd36fc3d83fa3542e438a62ebba, 4b5ede12992e95bf1c1e89f9dd5678e8, c7e0ccfb53f4504d025ab19b4d519d76, 861a7abebe63a64d9841c68c3aadfd68 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: 541a0d945d52c431cf5d89eafaa0a620, 8d3ccddb0e1c1104d5dd1d3984364c2a, bf8acb773a64cf32852b8bd67b570315, b998a3b3c2e721f3ac406a73a3598c8f, 5c688411addc9c2a2d419614aa9c6756 result, different first party: 541a0d945d52c431cf5d89eafaa0a620, 8d3ccddb0e1c1104d5dd1d3984364c2a, bf8acb773a64cf32852b8bd67b570315, b998a3b3c2e721f3ac406a73a3598c8f, 5c688411addc9c2a2d419614aa9c6756 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: , , , result, different first party: , , , unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.arthuredelstein.net:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: 92ff728296f096613fd40bf0118d5b36, a18a514ce9ae40e39655ca505462b975, 2f210a72b2aafd0e17fa8d8213fc8162, ee725406f6d8875a864ecf48311effa9, 3aecb0f16b020c66dd9b87cd2ad744d7 result, different first party: 92ff728296f096613fd40bf0118d5b36, a18a514ce9ae40e39655ca505462b975, 2f210a72b2aafd0e17fa8d8213fc8162, ee725406f6d8875a864ecf48311effa9, 3aecb0f16b020c66dd9b87cd2ad744d7 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:4433/connection_id`, {cache: "no-store"}); await sleepMs(500); } // Are we now connecting over h3? let response = await fetch(`https://h3.arthuredelstein.net:4433/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:4433/connection_id`); return await response.text(); } result, same first party: ee964b285b51a19318ebf0e005e90f10, c5bbd50c7494f50905acb733ae64e8c0, b978fa0a2933a602a35f234840df8ec7, 68a99f0d64ba7bfe0dd278ab32482e3a, 97237bd823e6af23c58afedbd0c4b78d result, different first party: ee964b285b51a19318ebf0e005e90f10, c5bbd50c7494f50905acb733ae64e8c0, b978fa0a2933a602a35f234840df8ec7, 68a99f0d64ba7bfe0dd278ab32482e3a, 97237bd823e6af23c58afedbd0c4b78d 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: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: 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: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
iframe cacheAn iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
image cacheCaching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
indexedDBThe IndexedDB API exposes a transactional database to web pages. That database can be used to track users across websites, unless it is partitioned.
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 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: 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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations. result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb 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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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
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: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 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: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 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: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb 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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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
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: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 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: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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: undefined result, different first party: undefined unsupported: true, true, true, true, true passed: undefined 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: undefined result, different first party: undefined unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb 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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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
prefetch cacheA suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites.
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 1, 1, 2 unsupported: false, false, false, false, false passed: true, false, false, false, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
ServiceWorkerThe ServiceWorker API allows websites to run code in the background and store content in the browser for offline use. If a ServiceWorker can be accessed from multiple websites, it can be abused to track users across sites.
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 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 () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb 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 () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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
SharedWorkerThe SharedWorker API allows scripts from multiple tabs to share a background thread of computation. If SharedWorker is not partitioned, then it can be abused to shared data between websites in your browser.
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 result, different first party: Error: undefined, Error: undefined, Error: undefined, Error: undefined, Error: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a result, different first party: Error: undefined, Error: undefined, Error: undefined, Error: undefined, Error: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 result, different first party: Error: undefined, Error: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 result, different first party: Error: undefined, Error: undefined, Error: undefined, Error: undefined, Error: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker result, different first party: Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker, Error: Can't find variable: SharedWorker unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: Error: undefined, Error: undefined, Error: undefined, Error: undefined, Error: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 result, different first party: Error: undefined, Error: undefined, Error: undefined, Error: undefined, Error: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true 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: 526751e88ece942956594c0fb2351b94f835678a6e54faad007cd8cf8ce0dd70, 671a575bce1b47249dbede1a65688b59929b5e27a2f733d641b45e75aa6ed11c, 9c26ade3268bdcec24f236360975e1dff59b0d240c02916b12fabba0f365b614, 317090aa6849eecefdc9813748c845be85f134c3c26790a808fa6bbd34140b3e, e95faf813b76c01a9ba2965f9e0b90b40ceb65afb2dd363e9765bf7aaf5767c0 result, different first party: 0430ca6598c026bf2000617ce178f4dca35543854434a1d00670f2e42e8cff12, 0430e72533521ddb2b4e28f20dbe628b5cb0937ec584aab512da87c3767423f2, 04308ed3ccbab79d86b66a14d28fb647bbf64b74a52aa35c4d5dc3ffa125af17, 0430c2e0938c8b7353a8af1775e745066106a2a8b240efba4a1fb6683f9f6562, 04306f7e4aa9c701fd58d76bdd19d850cbe475b6d3bd1b314bd9a0ef96f588be 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: f6d46fe11429b855cc5ab3bfe56c3e2d3cf704f9d8d3a861ec648070b3b99728, 71f6b10927835d097396b7ed494e1cfd89e0197b9f73d313cc6db85316df664e, 35f41279d8123aa82ac360ae8e6c2a137ac2315dc2d6b47b6c67c77be3b76bd0, f8334b15c1b0e7976ef185212eebee4c03cfb6e89e22eb66b01a6ec66cae868c, 313a424cccd8b5dc9733380af462d6161fc63f5728e795f7fde3e9ea2a48ac46 result, different first party: c6ee7007e5aef3211b7600f5e90cf8cfbabeafbca08ecdfe62422769f3b11f01, aff82e63bda2fbde1d3290b3c5509b4118b140dedb4b920e46d6e45a54911cdf, 66fea6ae8d51a6b8e1f06f7534abc4b17b73492d220c2a124efadd72ac7b5e1d, 93b8b77ad4dd28f7f0cd9d116fe4ddb6d09444eb07b8e6d60808ce2941840a3c, 50d6780c4e56ff8e27a85f6b11b87ff3579016761f33a6e576b2fc4ad1243ae7 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: d6fc4068d89b4c7213d4b500875f05e52c3e42104f68f91c8d9aba2d760ae357, 02a32aac72e8f8e21c084008b0eb6349cebd87e2222329912755525b52be9d92, e73dfa3a25a3af22f21de4e1d0ef2d44df2f671a9227b50fd66eb54f6b1a671c, 03db2891ece6057f93d89261b64ea464ddcf2f24f430b16eeee79430ac1c42fa, 1f511c6600e77c1ba51e20575d5315d686e7fe8a360c4985d5534e7a3d4f41ca result, different first party: 2174df7fae0abac26e2db7cc9473827423b90d4efddfc584e8befc71141c0198, 3b05c8e1ca1c0bd5db82212b6739fccc272c7a30c66a6c5766d6b550b20d3c61, 7f8a24a6ffd5a76dd92fc63bbb8685a12f85ee03e0a478fee1682a96529fe618, 3ce191ea87ad3945d2a56b976a11fc3e8937161267d10265c705c1598963093c, 697cf05ce62349d3d7aa8e137794d8dede311cd329c150d4e7969cdbf39d5352 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: 86f4c2eb1688202b63a02870880a2c599f1a533354cdd553f0570538e8c1b571, 038a741ec880356bd174a44e5cd1e1bfd553bc5478884352eb67e0a6883a7c3c, 2098c6a4213db2c4e5c89e72e62cd1a99e9d8f15908fb4a8bab731eb3978e739, 17f33055ddb43139c13963cea5c0165846e803adcead8fe5c0326d78bb57f3ee, 622786c9ae11f8fe91384f3d9845cc683ff5ceacbf7ea14d7938910eb75f261a result, different first party: 685f87e9528907a9fa097979a16017764552cf37130f8a7627ccf48c6e05fd36, c9d910eef20c2f02aa10dfd4c3a1b827a64f67833bed3281b687b6a9e591ace6, dd92344108883bc4cdd84ee0b8223d3a564e8fec485ae021a362a8ac59ac40c1, d4378142dca9d15b72494967195efae3ee1428764d11be8ebaa798b0e4a6dc34, aff4be3203316a5a530431d2cd8dfe691348d301c8bd0fe0b8de2c4339cb7841 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: 5a6eba2ba6d5e76e4ef45a67878ea65e91bc07a634aa177c1a0b3c45e5fe6eba, 66a17df1aa919b71c606b742aaaec945a88e6f1e904b0c825c2093528dddfd95, 23d43a78414881d875d3a1480983096ba66fcd9a881f7903c9c2cfff31b2033e, 2f4259082455c3267c84dd51e6714af38413e165037e5a4fcbe8dec259974186, dd14c33ec01142334f0f96db5a4f61519f1a45423900928fb96f4efee38e8eb1 result, different first party: 84be34bbf0c4383d0f645c7b2e592cfe0a91947f6de65b7db07028f1a5f8c2fe, f238fd5d5deb7eb61af462ebfc3af37ede8560ae15754bf81bdbce6b78212bdf, 854eafafac455e36cc76adb91b1ee9b5346efbd45cca46fae2ed1d656f905b1a, 610457305f47cc12481e07e88eea967d9d27ec60614fa75f90c31a347e7ee6f6, 22888357ac06fcc5a7bc71ee8ddda969a459e349cbca5a9585effff88c0ff2b0 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: c4d32b17982a9c188afe2cff59bd24942f4c6dd343fe8ae89b998bb2f84abb75, 7e7b56e2c5c720740bafe0b3458b797253da48e51cb5caefaaf820c8dd13bb4d, d6fee600b34f9e7d242c9128fb01c74e340c6b426b75bee79ca14ab0bfb387c0, 69150f00ea25c9807c3187f470ecf3337eb42fd5511b4b51d1f122e05f1f32ec, c21ee5bda9a0a7abd0166b4c3e52eb0fdcea383cba86ab4f6c042e299685018c result, different first party: 38260a3754a00f9bb67170e1d458ada38b0f18b440f76f7cd3477de59f254080, 1f92ce3d7e74fc0d68ddb1587f58f07cc6fcd030b982d701ee63cc9fcceca1e2, 8f5a2aea20ccd11dec052f046657aaa16c840ade3a6a147a3583901226229a40, 1256f29727bc7e50a2798624ed772032f64c47b0b11eef8ccdbe2952d1bac414, 86c848327c03ae23ffe7d3dd4c340632c8e3bada330bb1b4030243f54cfbe40c 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: c8544e79fb8fcc01a00bf609efd6ee0e004568477a9598023c5cd277a7f9c3e3, e2ca2a57d4502938af3a2a9ad623e7547ca08f7a33485f1dc6a21ac47e0b8ea8, 6376aafdf926648e35f044af01b42f98fce736b2a4f9f1c1d2b733988e20b143, ca131df3c89e8cd225ac9d6400f0806c1ca424af8e0b05231606bb60ae638e1f, c83679a1a7a31ae761f75baf397a4ca5ce4ddcc477a93d70d48eb70790adf3da result, different first party: f71e5cedcbc22ffb3f05c8690ead5b7b276ff03264a14c6eca3b091468eb785d, 907d1db9e0a634c17594ac9abe093ca2eae2f1d33ecd000d80a0a40b49300328, b357553c73460e1d29a32abdddbcf942073325a36b44f9429fce3b6da904bb4b, 45905abd1962dc71ef3542caedf27aa2be0857faf8b034a771dece772a940076, f7f6f2663ea19b8d8fbba964c28a904b165689c7fed9d9302bdc91efd8e023f5 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: 6aef7719f59b903d7972e8def2bfe5b9b1becc823bc8c7a7ce15407327aa704c, 310edd0422bae4c2914e0c9cbc0478b7df51eebc4c9567f35568f38f94883066, a5b09748cf020beafe15d57c471f5a0fbd7917c2cddd3136385d7ebfff41ec3d, ba53a31e12d01e37819d60ec4bf1ef5f14be01e85abbb1744518be2b6324e371 result, different first party: ebcf5911f58fd9d8b3d664a48786c0d8d034c1741b13cb408b7294b51ea259e8, a45dd7d0341c8792fe8f69f133578f53ecf60f5af38d16739cdbdb75c72c1051, 2472f3a1df134621741ff4b5eb12c2823924a1098c470d13cd41ecce807ed9b9, 24fb3b813582589ada84e4ba3b1e9fa5be189f70f86f719f6623f463a6971294 unsupported: false, false, false, false passed: true, true, true, true test failed: 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: 767a5dd67207b73fbc5904178461672a71945f510bdc0018f2dd801e50ee7a0f, 1d6477adc5e61aa1b3f62f055ca5188f145ecdb402123fd810a35605a409fbfe, c7e8b09b36405edd22196b5f9c224132d50e9efbca88bb71864549ca84683ce7, 31bff03f9753aa75847e275ab608226eec99f0b39d5cd77b6270982cda9f8f4e, 120bd3dac23a4caf08f9e03a837d5e530048f75fe79f20537dacd3a8c578220f result, different first party: d81ce61034bd429bcb58c0f6358b145db0b0ada37bcd135e841e4bea7262bb8e, 22048281ca6248f05c0d5b7381ff54644151880a79ab93fd751779fab1072c66, a3fcb687fdbd6b9875aeee4fdd72fabb3dac72ac75401460276b3765556c8cbd, 40032af42736ad12330a03c08fb950df2e3ba89cb237ef2c91cbb55e42105940, e1ba4cb62240e8af9c40cd909f6d917633ebed61d2278ad995381918c9316266 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: 7365962cf9860f91022aed43fcdb48e64ede25c7e4cc743b6907eaca0e3ec27e, 9c7715580fe76eedcb88f2c283b26db0a4b0983ffca3357ac0a604be010a2cee, 1468562ba2eece74cac2d42b5506f569a8af3c27999471c878f2e9e0d93e7cb1, f09442a2e571033e7a66c4ee597f0863772af947375c24148ae996d3207f82c1, b3f9f61f5ee74c3e583be970cc321aa73ba8861f79fa89cb4fa495d22980bc3a result, different first party: de78294476c2b2972b6d48ceeb7260a40fe019e0c18b435d790a5aca3f53d6d3, 78c76baf5a8ab61e34e19e34d878765f6670ee172b13f0f153928e00abf5d399, c88a67972f6d0314898db8d0a6542996581df355889cb00fbb0e097dad0d0bdb, 840347efb7cca3f0a540f02a9206d034ab5872ac604fc324eac13085df08a945, 9735e9b99f72702fbfc3244b0f21bc04820c6ab892e84bee63b11936a4328956 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("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated result, different first party: Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated, Error: Web SQL is deprecated unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true passed: undefined test failed: false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; return key; } read: async (key) => { const req = new XMLHttpRequest(); const loadPromise = new Promise(resolve => req.addEventListener("load", resolve)); req.open("GET", testURI("resource", "xhr", key)); req.send(); await loadPromise; let countResponse = await fetch(testURI("ctr", "xhr", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
Navigation testsWhen you click a hyperlink to navigate your browser from one site to another, certain browser APIs allow the first site to communicate to the second site. These privacy vulnerabilities can be fixed by introducing new limits on how much data is transfered between sites.
document.referrerThe Referer [sic] request header is a mechanism used by browsers to let a website know where the user is visiting from. This header is inherently tracking users across websites. In recent times, browsers have switched to a policy of trimming a referrer to convey less tracking information, but Referer continues to convey cross-site tracking data by default.
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { /* do nothing */ } read: () => new Promise((resolve) => { parent.postMessage({"read document.referrer": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ result, different first party: https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/, https://arthuredelstein.net/ unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
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: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 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: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a 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: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 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: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 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: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 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: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 result, different first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 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: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb 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: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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
window.nameThe window.name API allows websites to store data that will persist after the user has navigated the tab to a different website. This mechanism could be partitioned so that data is not allowed to persist between websites.
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 result, different first party: 7ee33558-9db1-4c47-a152-3e17eb1170e7, 463516ab-2da6-4a94-948b-01ebcedd7f97, c4dc2170-539a-468a-80de-ee8a1411fb36, 4295a8e3-d552-4962-971c-8c26216b49f6, 9e350288-a5d3-4dcf-be61-ec6bf6be9311 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a result, different first party: 01cbe2cb-4a5a-430b-8c78-7b23e79ea239, 711efb50-0752-4543-95ab-0d2f31cca438, 049d83a1-1467-4385-b508-2775a6d361f8, a7fe466e-3752-426c-a506-791caf1095fa, 02fb9102-4068-46d9-b55d-1978990ca08a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 result, different first party: 135f3504-0c04-49e7-b33d-559feee28769, ca3e039c-4bef-4a1e-86bf-8955abc2826d, 2d6cf32f-19c4-48ea-9669-0fdea5d22738, f241fad5-a666-48bc-a5c2-a7245927bc0d, 7c61338e-b316-4aaf-9a3d-578914a44205 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: bf7cd501-0e8a-48a2-a243-8225ff62d9d2, e4c18af0-eb0b-44e0-9d26-cba8c9eb1834, 9cc8ba03-d91c-425e-8b20-cc86c8992d10, 8780f6a0-9631-4ef4-95d1-3df84d7fd2aa, 614e075d-1be8-464d-9109-4eed41c02b08 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) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: ae47e7f2-eb8e-4b8c-83b6-5a636705e541, 30091c84-e152-49c7-aa9b-53225fa48371, b88dbb38-750d-45c5-bb0e-4795035cef52, 25bbb78a-9463-4c97-8f6d-fa8dad6a8bbf, 9476ae4f-5ee2-4980-97b0-3edabd1f1bb3 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) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 result, different first party: 0a37f913-b6d5-4e10-bc79-4ca4c65b5e4a, 064802d4-62bd-434b-98bd-649945c96808, 50002401-70d9-4095-ae78-e38de0b8303f, c5d1d425-c506-4052-95a1-098b582c2e53, 75feed82-07f9-4603-a484-680f0ad2b385 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: be76fad1-5625-4f95-9d08-315e2e9896a5, f61bf081-46ae-4c0e-a4ed-818f2cf1796d, d58ee3fc-4d19-4f41-89ba-15067e6cf89e, 7262e7b8-7c7d-4781-a5d6-0697f1c0d3af, da97cf90-d6ca-41db-b0dd-dcb9ce0b2fa4 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) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 result, different first party: 5e5a6377-ce85-4d1e-a662-65e303987e8f, ba21b00c-aa17-49bb-b1af-e1e0ef24c032, ec94ea04-1cc4-4e84-a6e3-2a716ab6fb1e, a41850d5-9ca6-4869-8e79-83b023f34bf2 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb result, different first party: 005eac38-e612-464b-b4ce-460cb4bb9cea, 53864373-cc65-450d-b82b-7cb0e2b81805, d18c2b33-e14a-418e-ab4a-1c01b59b4c74, 2ad2c3bb-c2ac-42f4-93d7-44097888156c, 0111081d-b827-49ca-afee-c2023918f9bb unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => parent.postMessage({"write window.name": secret}) read: () => new Promise((resolve) => { parent.postMessage({"read window.name": true}, "*"); addEventListener("message", ({data}) => { resolve(data); }, { once: true }); }) result, same first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 result, different first party: 08eb9d3b-7cb9-4348-b3f6-4e83fa27428b, 6c4c4547-91ab-4c4f-89f3-579db5b57b8d, 2a99a0e7-5010-4486-82af-ee53c543440a, fc1e9c12-0505-46df-a4ad-dcf3894da7e7, 68b212c5-041d-4d33-93fd-f8906e727f66 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: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: true,true,true,true,true result: Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded,Insecure website never loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
Upgradable addressChecks to see if an insecure address entered into the browser's address bar is upgraded to HTTPS whenever possible.
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true passed: true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
Upgradable hyperlinkChecks to see if the user has clicked on a hyperlink to an insecure address, if the browser upgrades that address to HTTPS whenever possible.
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true passed: true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
Upgradable 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: 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: false,false,false,false result: 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
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: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true result: 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
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: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false
  header value: undefined passed: false,false,false,false,false
  header value: undefined passed: false,false,false,false,false
GPC enabled third-partyThe Global Privacy Control is an HTTP header that can be sent by a browser to instruct a visited website not to sell the user's personal data to other parties. This test checks to see if the GPC header is sent to third-party elements on the web page.
  sec-gpc: 1 passed: true,true,true,true,true
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
IP address leakIP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address.
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: true,true,true,true
  passed: false,false,false,false,false
  passed: false,false,false,false,false
Stream isolationBrowsers that use Tor can use a different Tor circuit per top-level website.
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
  write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: false,false,false,false readSameFirstParty: 2a0b:f4c2:2::38,2a0b:f4c2:2::34,46.166.139.111,Error: Unsupported readDifferentFirstParty: 2001:4ba0:fff9:160:dead:beef:ca1f:1337,2620:7:6001::115,2a0b:f4c1:2::246,2a0e:e701:1198::1 passed: true,true,true testFailed: false,false,false,true
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: true,true,true,false passed: true,true,true,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
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: 1440,1440,1440,1440,1440 desired value: 1112,1112,1112,1112,1112 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1336,1336,1336,1336,1336 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 900,900,900,900,900 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 928,928,928,928,928 desired value: 928,928,928,928,928 passed: true,true,true,true,true
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 860,860,860,860,860 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1000,1000,1000,1000 desired value: 1000,1000,1000,1000 passed: true,true,true,true
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1260,1260,1260,1260,1260 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
Media query screen widthWidth of the user's screen in pixels.
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1200,1200,1200,1200,1200 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1607,1607,1607,1607,1607 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 1600,1600,1600,1600,1600 desired value: 1600,1600,1600,1600,1600 passed: true,true,true,true,true
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1880,1880,1880,1880,1880 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1324,1324,1324,1324,1324 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 1000,1000,1000,1000 desired value: 1000,1000,1000,1000 passed: true,true,true,true
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1200,1200,1200,1200,1200 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1405,1405,1405,1405,1405 passed: false,false,false,false,false
outerHeightHeight of the browser window in pixels, including browser chrome.
  expression: outerHeight desired expression: innerHeight actual value: 1187,1187,1187,1187,1187 desired value: 1112,1112,1112,1112,1112 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1415,1415,1415,1415,1415 desired value: 1336,1336,1336,1336,1336 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 979,979,979,979,979 desired value: 900,900,900,900,900 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1068,1068,1068,1068,1068 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 928,928,928,928,928 desired value: 928,928,928,928,928 passed: true,true,true,true,true
  expression: outerHeight desired expression: innerHeight actual value: 1061,1061,1061,1061,1061 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 940,940,940,940,940 desired value: 860,860,860,860,860 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1000,1000,1000,1000 desired value: 1000,1000,1000,1000 passed: true,true,true,true
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371,1371 desired value: 1260,1260,1260,1260,1260 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371,1371 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
screen.heightHeight of the user's screen, in pixels.
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1112,1112,1112,1112,1112 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1336,1336,1336,1336,1336 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 900,900,900,900,900 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 928,928,928,928,928 desired value: 928,928,928,928,928 passed: true,true,true,true,true
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 860,860,860,860,860 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1000,1000,1000,1000 desired value: 1000,1000,1000,1000 passed: true,true,true,true
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1260,1260,1260,1260,1260 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
screen.widthWidth of the user's screen, in pixels.
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1200,1200,1200,1200,1200 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1607,1607,1607,1607,1607 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 1600,1600,1600,1600,1600 desired value: 1600,1600,1600,1600,1600 passed: true,true,true,true,true
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1880,1880,1880,1880,1880 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1324,1324,1324,1324,1324 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 1000,1000,1000,1000 desired value: 1000,1000,1000,1000 passed: true,true,true,true
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1200,1200,1200,1200,1200 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1405,1405,1405,1405,1405 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: 3695,3695,3695,3695,3695 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 222,222,222,222,222 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 3000,3000,3000,3000,3000 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 4,4,4,4,4 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  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: 460,460,460,460,460 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 1019,1019,1019,1019,1019 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 0,0,0,0 desired value: 0,0,0,0 passed: true,true,true,true
  expression: screenX desired expression: 0 actual value: 751,751,751,751,751 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 44,44,44,44,44 desired value: 0,0,0,0,0 passed: false,false,false,false,false
screenYPosition, in pixels, of the top edge of the browser window on screen.
  expression: screenY desired expression: 0 actual value: 228,228,228,228,228 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 25,25,25,25,25 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 36,36,36,36,36 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 25,25,25,25,25 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: 342,342,342,342,342 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 79,79,79,79,79 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 0,0,0,0 desired value: 0,0,0,0 passed: true,true,true,true
  expression: screenY desired expression: 0 actual value: 47,47,47,47,47 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 69,69,69,69,69 desired value: 0,0,0,0,0 passed: false,false,false,false,false
System font detectionWeb pages can detect the presence of a font installed on the user's system. The presence or absence of various fonts is commonly used to fingerprint users.
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true,true
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true,true
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false
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: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
__hsscHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
__hstcHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
__sDrip.com email address tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
_hsencHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
_openstatYandex tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
dclidDoubleClick Click ID (Google)
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
fbclidFacebook Click Identifier
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
gclidGoogle Click Identifier
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
hsCtaTrackingHubSpot tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
igshidInstagram tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
mc_eidMailchimp Email ID (email recipient's address)
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
mkt_tokAdobe Marketo tracking parameter
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
ml_subscriberMailerLite email tracking
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
ml_subscriber_hashMailerLite email tracking
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
msclkidMicrosoft Click ID
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
oly_anon_idOmeda marketing 'anonymous' customer id
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
oly_enc_idOmeda marketing 'known' customer id
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
rb_clickidUnknown high-entropy tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
s_cidAdobe Site Catalyst tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
vero_convVero tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
vero_idVero tracking parameter
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
wickedidWicked Reports e-commerce tracking
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
yclidYandex Click ID
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  passed: true,true,true,true,true
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 passed: false,false,false,false
  value: 5035132803439002 passed: false,false,false,false,false
  value: 5035132803439002 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: 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,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
Amazon adsystemTests whether the browser blocks the page from loading the tracker at https://aax-us-east.amazon-adsystem.com/x/px
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: true,true,true,true,true
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: false,false,false,false,false
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: false,false,false,false,false
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: true,true,true,true,true
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: true,true,true,true,true
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: true,true,true,true,true
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: false,false,false,false,false
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: false,false,false,false
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: false,false,false,false,false
  url: https://aax-us-east.amazon-adsystem.com/x/px passed: true,true,true,true,true
AppNextTests whether the browser blocks the page from loading the tracker at https://acdn.adnxs.com/dmp/up/pixie.js
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: true,true,true,true,true
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: false,false,false,false,false
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: false,false,false,false,false
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: true,true,true,true,true
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: true,true,true,true,true
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: true,true,true,true,true
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: false,false,false,false,false
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: false,false,false,false
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: false,false,false,false,false
  url: https://acdn.adnxs.com/dmp/up/pixie.js passed: true,true,true,true,true
Bing AdsTests whether the browser blocks the page from loading the tracker at https://bat.bing.com/bat.js
  url: https://bat.bing.com/bat.js passed: true,true,true,true,true
  url: https://bat.bing.com/bat.js passed: false,false,false,false,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: 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
  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://pdev.chartbeat.net/ping?h=x&p=x&r=&b=
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: true,true,true,true,true
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: false,false,false,false,false
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: false,false,false,false,false
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: true,true,true,true,true
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: true,true,true,true,true
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: true,true,true,true,true
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: false,false,false,false,false
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: false,false,false,false
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: false,false,false,false,false
  url: https://pdev.chartbeat.net/ping?h=x&p=x&r=&b= passed: false,false,false,false,false
CriteoTests whether the browser blocks the page from loading the tracker at https://csm.da.us.criteo.net/iev
  url: https://csm.da.us.criteo.net/iev passed: true,true,true,true,true
  url: https://csm.da.us.criteo.net/iev passed: false,false,false,false,false
  url: https://csm.da.us.criteo.net/iev passed: false,false,false,false,false
  url: https://csm.da.us.criteo.net/iev passed: true,true,true,true,true
  url: https://csm.da.us.criteo.net/iev passed: true,true,true,true,true
  url: https://csm.da.us.criteo.net/iev passed: true,true,true,true,true
  url: https://csm.da.us.criteo.net/iev passed: false,false,false,false,false
  url: https://csm.da.us.criteo.net/iev passed: false,false,false,false
  url: https://csm.da.us.criteo.net/iev passed: false,false,false,false,false
  url: https://csm.da.us.criteo.net/iev passed: true,true,true,true,true
DoubleClick (Google)Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: 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: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: false,false,false,false,false
  url: https://securepubads.g.doubleclick.net/static/glade.js passed: true,true,true,true,true
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: 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,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
Google Ad ServicesTests whether the browser blocks the page from loading the tracker at https://www.googleadservices.com/pagead/conversion.js
  url: https://www.googleadservices.com/pagead/conversion.js passed: true,true,true,true,true
  url: https://www.googleadservices.com/pagead/conversion.js passed: false,false,false,false,false
  url: https://www.googleadservices.com/pagead/conversion.js passed: false,false,false,false,false
  url: https://www.googleadservices.com/pagead/conversion.js passed: true,true,true,true,true
  url: https://www.googleadservices.com/pagead/conversion.js passed: true,true,true,true,true
  url: https://www.googleadservices.com/pagead/conversion.js passed: false,false,false,false,false
  url: https://www.googleadservices.com/pagead/conversion.js passed: false,false,false,false,false
  url: https://www.googleadservices.com/pagead/conversion.js passed: false,false,false,false
  url: https://www.googleadservices.com/pagead/conversion.js passed: false,false,false,false,false
  url: https://www.googleadservices.com/pagead/conversion.js passed: true,true,true,true,true
Google AnalyticsTests whether the browser blocks the page from loading the tracker at https://google-analytics.com/urchin.js
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false
  url: https://google-analytics.com/urchin.js passed: false,false,false,false,false
  url: https://google-analytics.com/urchin.js passed: true,true,true,true,true
Google SyndicationTests whether the browser blocks the page from loading the tracker at https://tpc.googlesyndication.com/sodar/UFYwWwmt.js
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: true,true,true,true,true
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: false,false,false,false,false
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: false,false,false,false,false
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: true,true,true,true,true
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: true,true,true,true,true
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: false,false,false,false,false
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: false,false,false,false,false
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: false,false,false,false
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: false,false,false,false,false
  url: https://tpc.googlesyndication.com/sodar/UFYwWwmt.js passed: true,true,true,true,true
Google Tag ManagerTests whether the browser blocks the page from loading the tracker at https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true,true,true,true,true
  url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false,false,false,false,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: 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
  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
Index ExchangeTests whether the browser blocks the page from loading the tracker at https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false,false,false,false,false
  url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true,true,true,true,true
New RelicTests whether the browser blocks the page from loading the tracker at https://js-agent.newrelic.com/nr-1212.min.js
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: true,true,true,true,true
  url: https://js-agent.newrelic.com/nr-1212.min.js passed: false,false,false,false,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,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
QuantcastTests whether the browser blocks the page from loading the tracker at https://pixel.quantserve.com/pixel
  url: https://pixel.quantserve.com/pixel passed: true,true,true,true,true
  url: https://pixel.quantserve.com/pixel passed: false,false,false,false,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,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
Scorecard Research BeaconTests whether the browser blocks the page from loading the tracker at https://sb.scorecardresearch.com/internal-c2/default/cs.js
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true,true,true,true,true
  url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: false,false,false,false,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,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
TaboolaTests whether the browser blocks the page from loading the tracker at https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: true,true,true,true,true
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: false,false,false,false,false
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: false,false,false,false,false
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: true,true,true,true,true
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: true,true,true,true,true
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: true,true,true,true,true
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: false,false,false,false,false
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: false,false,false,false
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: false,false,false,false,false
  url: https://cdn.taboola.com/libtrc/UNIQUEID/tfa.js passed: true,true,true,true,true
Twitter AdsTests whether the browser blocks the page from loading the tracker at https://static.ads-twitter.com/uwt.js
  url: https://static.ads-twitter.com/uwt.js passed: true,true,true,true,true
  url: https://static.ads-twitter.com/uwt.js passed: false,false,false,false,false
  url: https://static.ads-twitter.com/uwt.js passed: false,false,false,false,false
  url: https://static.ads-twitter.com/uwt.js passed: true,true,true,true,true
  url: https://static.ads-twitter.com/uwt.js passed: true,true,true,true,true
  url: https://static.ads-twitter.com/uwt.js passed: false,false,false,false,false
  url: https://static.ads-twitter.com/uwt.js passed: false,false,false,false,false
  url: https://static.ads-twitter.com/uwt.js passed: false,false,false,false
  url: https://static.ads-twitter.com/uwt.js passed: false,false,false,false,false
  url: https://static.ads-twitter.com/uwt.js passed: true,true,true,true,true
Yandex AdsTests whether the browser blocks the page from loading the tracker at https://yandex.ru/ads/system/header-bidding.js
  url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,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: true,true,true,true,true
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: false,false,false,false,false
  url: https://yandex.ru/ads/system/header-bidding.js passed: true,true,true,true,true
Yandex MetrikaTests whether the browser blocks the page from loading the tracker at https://mc.yandex.ru/metrika/tag.js
  url: https://mc.yandex.ru/metrika/tag.js passed: true,true,true,true,true
  url: https://mc.yandex.ru/metrika/tag.js passed: false,false,false,false,false
  url: https://mc.yandex.ru/metrika/tag.js passed: false,false,false,false,false
  url: https://mc.yandex.ru/metrika/tag.js passed: true,true,true,true,true
  url: https://mc.yandex.ru/metrika/tag.js passed: true,true,true,true,true
  url: https://mc.yandex.ru/metrika/tag.js passed: false,false,false,false,false
  url: https://mc.yandex.ru/metrika/tag.js passed: false,false,false,false,false
  url: https://mc.yandex.ru/metrika/tag.js passed: false,false,false,false
  url: https://mc.yandex.ru/metrika/tag.js passed: false,false,false,false,false
  url: https://mc.yandex.ru/metrika/tag.js passed: true,true,true,true,true