Nightly builds
(click anywhere for more info)


brave
1.35

brave
1.35

private

brave
1.35

Tor

chrome
98.0

chrome
98.0

private

edge
98.0

edge
98.0

private

opera
83.0

opera
83.0

private

safari
15.4

safari
15.4

private

tor
tbb-nightly.2021

vivaldi
5.0

vivaldi
5.0

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, h3, h2, h3, h2 unsupported: false, false, false, false, false passed: true, false, true, false, 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: 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 result, different first party: h2, h3, h2, h3 unsupported: false, false, false, false passed: true, false, true, false 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: 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: 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: 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, 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, 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: h3, h3, h3, h3 result, different first party: h3, h3, h3, h3 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 result, different first party: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 result, different first party: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 result, different first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 result, different first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 result, different first party: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Load failed, Error: Load failed, Error: Load failed, a3150014-4496-4d55-8ccb-53f7deb1ec35, Error: Load failed result, different first party: Error: Load failed, Error: Load failed, Error: Load failed, a3150014-4496-4d55-8ccb-53f7deb1ec35, Error: Load failed unsupported: false, false, false, false, false passed: , false test failed: true, true, true, false, true
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 result, different first party: Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource., Error: NetworkError when attempting to fetch resource. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca result, different first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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: 0ee66e0f-dd12-43a2-811d-c8693522f7f3, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message 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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 result, different first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 04304ced-0c65-4f7b-b0be-750f3369b2ae, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 1181cbeb-341e-4302-a85d-e15c0531fc56, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 unsupported: false, false, false, false, false passed: true, 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 result, different first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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: Error: no BroadcastChannel message, Error: no BroadcastChannel message, Error: no BroadcastChannel message, a3150014-4496-4d55-8ccb-53f7deb1ec35, Error: no BroadcastChannel message 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 test failed: true, true, true, false, true
  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: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca result, different first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7156300943180247, 7156300943180247, 7156300943180247, 7156300943180247, 7156300943180247 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 7164018468744888, 7164018468744888, 7164018468744888, 7164018468744888 result, different first party: 7164018468744888, 7164018468744888, 7164018468744888, 7164018468744888 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9 result, different first party: bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9, bb0f63db-19a9-4355-9986-c80f551b9cb9 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 5525088998911329, 5525088998911329, 5525088998911329, 5525088998911329, 5525088998911329 result, different first party: 5525088998911329, 5525088998911329, 5525088998911329, 5525088998911329, 5525088998911329 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), a3150014-4496-4d55-8ccb-53f7deb1ec35, Error: undefined is not an object (evaluating 'cacheKeys[0].url') result, different first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: , true test failed: true, true, true, false, true
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 48672960489762285, 48672960489762285, 48672960489762285, 48672960489762285 result, different first party: 48672960489762285, 48672960489762285, 48672960489762285, 48672960489762285 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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
cookieThe 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) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: , , , a3150014-4496-4d55-8ccb-53f7deb1ec35, result, different first party: , , , , unsupported: false, false, false, false, false passed: , true test failed: true, true, true, false, true
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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_19336712154484736, fake_8724045358399455, fake_29999758382245223, fake_9387694750794557, fake_3724102384183774 result, different first party: fake_1656189354578106, fake_7993112991825635, fake_6256815037449486, fake_7951238769191937, fake_37665259255257655 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_7878041235402709, fake_6028000712312009, fake_17373964476278014, fake_926981209472745, fake_9880630998949007 result, different first party: fake_8869749856618601, fake_5116165930376442, fake_11451461426066056, fake_9360445885610966, fake_1996385921866417 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_1767050838837565, fake_5681917154215015, fake_06822749663002137, fake_02406124256932607 result, different first party: fake_1767050838837565, fake_40358985853324736, fake_06822749663002137, fake_02406124256932607 unsupported: false, false, false, false passed: false, true, false, false test failed: false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; 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_4635274751393119, fake_11127499403219665, fake_4022225417104981, fake_7097192472730514 result, different first party: fake_4635274751393119, fake_11127499403219665, fake_4022225417104981, fake_7097192472730514 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { const href = testURI("resource", "css", key); const head = document.getElementsByTagName("head")[0]; head.innerHTML += ``; 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_6338298770360034, fake_2539063123056713, fake_7639359659675624, fake_4038212422388707, fake_4094578327972227 result, different first party: fake_6338298770360034, fake_2539063123056713, fake_7639359659675624, fake_4038212422388707, fake_4094578327972227 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_9893841737610867, fake_9679821269802973, fake_6176562749267231, fake_45021090737616865, fake_4699341531364316 result, different first party: fake_9893841737610867, fake_9679821269802973, fake_6176562749267231, fake_45021090737616865, fake_5086521646705822 unsupported: false, false, false, false, false passed: false, false, false, false, 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_6565185044423851, fake_6214545311261126, fake_2025791157914978, fake_7792532340940228, fake_8480369129539367 result, different first party: fake_6565185044423851, fake_6214545311261126, fake_2025791157914978, fake_7792532340940228, fake_8480369129539367 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_5741208201138686, fake_22760991388802077, fake_3791114681445338, fake_699398003185215, fake_3448506641053801 result, different first party: fake_3337858195304453, fake_22760991388802077, fake_3791114681445338, fake_699398003185215, fake_3448506641053801 unsupported: false, false, false, false, false passed: true, 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_4265548938743584, fake_02818526093828355, fake_7825362479576998, fake_49750061633959985, fake_39851966922071536 result, different first party: fake_4265548938743584, fake_02818526093828355, fake_7825362479576998, fake_49750061633959985, fake_39851966922071536 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_2604110396140875, fake_5554864590027355, fake_9469746644579002, fake_45345123219607975, fake_6539734024318935 result, different first party: fake_7646071906732357, fake_25155764111488543, fake_775721055921432, fake_6419124634840938, fake_021229744402042394 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_22434704719835508, fake_22217371022778454, fake_501308802691764, fake_30884268168153617, fake_7182754628439021 result, different first party: fake_8902057094064051, fake_7684103579788015, fake_009228620190870007, fake_8146309266052545, fake_6428537237610925 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_32796792995375235, fake_9816081244420063, fake_7114210868424482, fake_15237497223835694, fake_3523213482786649 result, different first party: fake_06374435189119887, fake_07459946348923796, fake_08399564936989479, fake_6973107331599102, fake_5891121719493586 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_8711724252949842, fake_7428119500215653, fake_9056872708269943, fake_06007748188973494 result, different first party: fake_36177740955687043, fake_7428119500215653, fake_40084943414357355, fake_06007748188973494 unsupported: false, false, false, false passed: true, false, true, false 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_16410416152556961, fake_19342156951952183, fake_40868655646261565, fake_8881247043491756, fake_09466181521623884 result, different first party: fake_6917646621725233, fake_29174618079809567, fake_29957833164925174, fake_7755680174056885, fake_8423683090006218 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
favicon cacheA favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites.
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 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 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 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
  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: 2, 2, 2, 1, 2 result, different first party: 3, 3, 3, 2, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
font cacheWeb fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking.
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: true, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 1, 2 result, different first party: 3, 3, 3, 2, 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
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 0ee66e0f-dd12-43a2-811d-c8693522f7f3, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 04304ced-0c65-4f7b-b0be-750f3369b2ae, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 04304ced-0c65-4f7b-b0be-750f3369b2ae, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 result, different first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 result, different first party: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: , , , a3150014-4496-4d55-8ccb-53f7deb1ec35, result, different first party: , , , a3150014-4496-4d55-8ccb-53f7deb1ec35, unsupported: false, false, false, false, false passed: , false test failed: true, true, true, false, true
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca result, different first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 0ee66e0f-dd12-43a2-811d-c8693522f7f3, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 04304ced-0c65-4f7b-b0be-750f3369b2ae, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 04304ced-0c65-4f7b-b0be-750f3369b2ae, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 result, different first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 result, different first party: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: , , , a3150014-4496-4d55-8ccb-53f7deb1ec35, result, different first party: , , , a3150014-4496-4d55-8ccb-53f7deb1ec35, unsupported: false, false, false, false, false passed: , false test failed: true, true, true, false, true
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca result, different first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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: cfee6e531c5f27978e61b85226c4dc98, c508e812627b82a37814dc9d7c495587, 11dd295439917c455b6af797ecc46d05, 84417bcc008e2a916b3326d52a13cf36, bd8ec4d0d51e4ebc16c9ec9540339e56 result, different first party: a75a6ce684685f85d9bdc8735c4aa5df, fbd85fdd9c1d856e2fc652c64ae755f9, 72b2f28fc1d873a2b323ab0734747818, d3613c8999d0c5fee5539577a706337a, d54aab7dbb2d0339b740808f2d9289a5 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: 5e2851fa50828735b24eed98c7cc823a, 1b6eb8e81cc7408fc4686910393dcd7f, ce6f9a1ea0e68fdc9e727dc41facffdb, a9c5fdcb2dd4ccf82b686b8d62aaf8fd, e03f19f9f837bc3f1004c238be85871e result, different first party: 5a507290cd93408651569028010c1f0e, babed5ee37ebd9b3398378b8bc443cfe, aac869f94baf1d13347d226168a25252, 65518a2bd909ab25508adcd4cbba537c, e5e7e68874be5bcc64c106ab86206687 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: , , , 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: 6cd02baaf1a2fb240d0d044e695cc512, 54d5d947011f95b2383f4b62b609f255, 9a035cb2eb38cc8879fe34faa7f912b3, c371dc2a846d491290b56c6d224cb3fe result, different first party: d746a73871a4ea57ae8985cae6f426c3, 3870776b3161c92d3f34fa24a6e034fc, , 09a8bc3ce243e9e6c96b3b9cb2186dc8 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.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: cd8eda093f59ef51c61fcae959cbe031, e041bb2dc6adbb6d05284c486ab58824, 41168b4ca30444fd5301c6204fc8c652, c78b383ad90626dce22b3b46d9087e09, e4416759b33fa6993d51d685e7b1b789 result, different first party: 24ed62fbc1bcd1d6f2f32d1e056304cf, 8019707e9a8d1119390e67e6b8dc84ac, 66cfb1c1d97d985e536822f51e913977, e7fad2c6cc3652761e193fc64f7d2da7, e7f3635e204fb42b6690a0c1927d50a6 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: f0b8578a92c7c5873791ff5b4faf8e15, ee7f50ab10a8797e13a45ed1616d86a9, 2d434148189626360fbea7b7b043c411, 4fe407ebbf2347d72d4777e621e31deb, d917d1f427ddeadc286556399b78be66 result, different first party: f0b8578a92c7c5873791ff5b4faf8e15, ee7f50ab10a8797e13a45ed1616d86a9, 2d434148189626360fbea7b7b043c411, 4fe407ebbf2347d72d4777e621e31deb, d917d1f427ddeadc286556399b78be66 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: 67bd002b3369ac43859350146d076db5, 5e45608b6fd0f85256ea6b619145be3f, e049b8d564f14f0d5e2cd060e61710ff, 30096a81bc02f37cc594ffe97e6b5eae, f1c8200d9d451cc7fd3d5c0caf9ab536 result, different first party: 67bd002b3369ac43859350146d076db5, 5e45608b6fd0f85256ea6b619145be3f, e049b8d564f14f0d5e2cd060e61710ff, 30096a81bc02f37cc594ffe97e6b5eae, f1c8200d9d451cc7fd3d5c0caf9ab536 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: d71391b2be3b341cfe8191a9dcfd28d3, 0fb9030499de4f12f16b58002116fc5c, cbba761a2b970129a06946cd0158b28c, c58bcced03f77c37ee99025edf9eb685, 7cbcd2e2dd3802fe0622efc5fc0fa16d result, different first party: d71391b2be3b341cfe8191a9dcfd28d3, 0fb9030499de4f12f16b58002116fc5c, cbba761a2b970129a06946cd0158b28c, c58bcced03f77c37ee99025edf9eb685, 7cbcd2e2dd3802fe0622efc5fc0fa16d 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: cb28ca8ccee68845eeeae8bc0fc92db4, e2d5c54951ab445c9ee996c6d1e64c10, 8f00f51569e16c72e17d02445583596b, 5df4933fb32bb0fdd9b9ec924cca4d59, 2e74be0653e58805ca2b4c44fcca2759 result, different first party: cb28ca8ccee68845eeeae8bc0fc92db4, e2d5c54951ab445c9ee996c6d1e64c10, 8f00f51569e16c72e17d02445583596b, 5df4933fb32bb0fdd9b9ec924cca4d59, 2e74be0653e58805ca2b4c44fcca2759 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, 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, 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: 6827513051cf652f23cbc863ca90cd53, 41fb17bb85f4b0821650e99c1bbdfb46, 8425a41269b673f4514261822e57cce7, c692e7fa265d91c077e400ae49b06c3e result, different first party: 6827513051cf652f23cbc863ca90cd53, 41fb17bb85f4b0821650e99c1bbdfb46, 8425a41269b673f4514261822e57cce7, c692e7fa265d91c077e400ae49b06c3e unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { // Ensure that we can switch over to h3 via alt-svc: for (let i = 0; i<3; ++i) { await fetch(`https://h3.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: 5df577e0574d0ec4cd837d35a8671698, 9dcff212d2f416de3ea23e039adb6071, 420cee8740b13c9d39995ae6319ea89a, b46bcf578a2268101b860e4f1c5c9bce, 52303c5d9a618f8250871f860edb1386 result, different first party: 5df577e0574d0ec4cd837d35a8671698, 9dcff212d2f416de3ea23e039adb6071, 420cee8740b13c9d39995ae6319ea89a, b46bcf578a2268101b860e4f1c5c9bce, 52303c5d9a618f8250871f860edb1386 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: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed result, different first party: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed result, different first party: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed result, different first party: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
iframe cacheAn iframe is an element in a web page than allows websites to embed a second web page. Caching of this web page could be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 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, Error: Failed to fetch 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: 2, 2, 2, 1, 2 result, different first party: 3, 3, 3, 2, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 2, 2, 2, 2 unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
image cacheCaching of images in web browsers is a standard behavior. But if that cache leaks between websites, it can be abused for cross-site tracking.
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 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 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: true, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 2, 2, 2, 1, 2 result, different first party: 3, 3, 3, 2, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false 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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 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. unsupported: false, false, false, false passed: true, true, true, true 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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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: , a3150014-4496-4d55-8ccb-53f7deb1ec35 result, different first party: undefined unsupported: false, false, false, false, false passed: , true test failed: true, true, true, false, true
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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: , , , 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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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: , , , a3150014-4496-4d55-8ccb-53f7deb1ec35, result, different first party: , , , , unsupported: false, false, false, false, false passed: , true test failed: true, true, true, false, true
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 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. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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, 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, 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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { if (navigator.locks) { navigator.locks.request(key, lock => new Promise((f,r) => {})); let queryResult = await navigator.locks.query(); return queryResult.held[0].clientId; } else { throw new Error("Unsupported"); } } read: async () => { if (navigator.locks) { let queryResult = await navigator.locks.query(); return queryResult.held[0].name; } } result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1 result, different first party: 1, 1, 1, 1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 2 unsupported: false, false, false, false, false passed: false, 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: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: true, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 2, 1 unsupported: false, false, false, false, false passed: false, false, false, true, false test failed: false, false, false, false, false
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 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: 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: 1, 1, 1, 1 result, different first party: 2, 1, 2, 2 unsupported: false, false, false, false passed: true, false, true, true test failed: false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
ServiceWorkerThe ServiceWorker API allows websites to run code in the background and store content in the browser for offline use. If a ServiceWorker can be accessed from multiple websites, it can be abused to track users across sites.
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { 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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { 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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false 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: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 37f0f939-4df8-4013-832a-0d9689ac9960, ba35dd76-67f1-4e57-a5e5-8d067900db3c, 4b805a3f-8357-4cef-88ce-6cb57a0b1ad3, a3150014-4496-4d55-8ccb-53f7deb1ec35, eb7e1f71-c4f0-490a-909c-671c2c5acec5 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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, 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: Error: undefined, Error: undefined, Error: undefined, Error: undefined 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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false 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: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: 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: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false 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: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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: 7ea9061b9598e9e9125837db2ba954e29b859386734627acbc52f8d751002842, 97657ca289565511e456c206e9e0e3b7a664a9e045114edda268231be95a7174, ff92684c31b075d120ad96a08ada8f13e386fdb8ef2781aa6961567299f3103b, 28e3df6c97363ed57ec7702dd0472511688f21b76ac7d06733d5908872816c8b, 5fefbdbe57230686f55b98b434585ec9c2a91ca596adbbacb44852a5d93c24e1 result, different first party: 043036a2b2983825c52434b1c54fd9a9e9bb6099d118d971cd14b858d47dd4c2, 0430910ae880ecf814767e41b79f2a77b8d8eb76536a46abe3b33c7357fe389c, 0430d041e4f45d8e59d0f2d5e11d376ce01ed7ea3de6730adb40a41d376d69b4, 04309a505d45a1165b3fa478ecbcf8d15d5f173f18036a5b149d71f7fdc73f17, 04301bbdd2ae6dde734522979575c924d7fd0f4147095239f640f4923fec34eb 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: 4eb65d71746b1556dfcc89ddb7324f9bbfed6bfb6dd7ed2c6154e4faf065db6d, 19d682c934632584338a3c36f228589ef8920e07ac5ed73f58513cf73348387b, e44080c80a605841fe4fd6e79cdac9f9e861fdc731e90025870d664550c0852f, fb6e2107f7427b8d76621367684ba1421df362a3f09cc7961eecb4dd6c8cff67, 472d82cbe374b2d7bc79f946f3f4523dc6153aa666dd5ea9d08fc8de889eee3c result, different first party: 04304282aded99b7e3a61d10bb438532f517eb55ff21f713ce8fc2d027e34d61, 0430d1fc95f1f9a4fd400af4665a041d7cb52384615f487403461fb5935d5a31, 043030c4ed982e12fd881056150b91cc257650ec9868c88b8f15d3780462d651, 0430827da03508f9d75a94449e1a465fed1d4adcfdc0657369831247ebf5d669, 04301586c48ca23200ec438fbe5ae68f08de2eab2728ef4d6968cee0a9df7d2b 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: 0f2a758b3d6b50860e55df8a96c565495963bd78b1217ce215f0bf6c1e89938d, 8c53a46240f5e90e5e0f4dc585f48917c36e85bab1d7f3c6ec4ddfd066292794, 11108cd06e29d78585da4a4fccc05413b86d1e4fb6d1a56c82128d581e8ec79f, 686c7ac01e5cb9210bbff9263bcf72f296962f5a896ee9207838b5b3babf26ea result, different first party: 04307b4703a46212ac8666979bcd40abdcacee50248f0d0463508d5bbca60151, 04305493108ebff844af64ec7f41286c5e090f99f4aea8c6bb91d8b5defe45ba, 0430758e7669c4c62d8ec2459d34efa085f98bd3b0a0ba922f0734dcb9f89e34, 0430e3bbb3858b8c92db6917a925157c8ac6c0bc7b90ff384f4b34f5d50a9c48 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: 0be0532680349f5810047f4c763849b36e12a0f474c1e1d07e308b52f6ede085, 3a74d325869af9791cdcdc078ccc802030585804b2ab4f5126045970daab6fbe, dfe9adc735e9ff44d6fcd5a93042686fc967baa0ec4f8624d0889673f96d7901, 46a580ebcdae62f35cc3ec9e68c92f2b14a97433300e9ff72233bf0358ac05ff result, different first party: 04303d328f69e87a673baa26707c3ceaff5693eed3e45fa0842b8f0619fad9e0, 0430b832948e91cc68d51ba567c25a76da06ba668c164f9668e966191fb64e69, 04305dfb214727e4c41a6cf40c6e9b8bbcc55d378d0de95380ee0ed1c7cf2834, 04303388cf243b8562c9d929b4ef3fb75467e4059ce625804997c3ad18d720e1 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: a6357c338a64f5ff0bc9b2f3b794f2b2a00a447f4a910e6434fa71c9a4f1e3ef, 2bf35848bd77593fb6f7ff41b9278ee04d23f333c2e14aca392b90e4d55a5396, 0d1bdc624c9487e44180cd57372136a5e6472ca1877fde8a7566e8fa71b3160e, e1e73e31e36da1323edf25bf8d37109346f072c47f978ea707d7c5e2f90c2797, e3193cc07848222dddeb895ee8ffd9e3354bdab49cf7f02cba846433b91898dd result, different first party: 04309ce989c480b7453dae4d6145f51689e67212e6930f9803c93454fbe8fbff, 043081c4f92e4ab0599d4361aeba1263ff60de7e46527fa60d2bcd08f0914841, 0430561756c1c2bbcb80e2041d5b0930a0d2fa018d12eff4468922d846eea07f, 0430e95739038bd4ad8e5634130e5d4ac4db017c4eab1b410892eb0519ef4253, 0430801febb85266b62e86386ef1ba6dee6b02eaa785389684202f73490be9e1 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: bd830c9f570db2b97159f0bdc86b6c63fdfe103984dcbaf3091b48890247360e, fa8714177b48e74ae90b7e14b910ed2e1571b5192b642d5c7b45184e4b541f4d, 4e7325478a9cf9c8dfbbb7f70fa5d4e70df39505de423d448cb3681564675534, 3569240e2fa198ec3818ec737674c8b1d47c32ced8239691b975d81ca5ed7ea1, dc07e24e6209c27df7de0dc94bb6bff411840ee452b56083cbf7706febe83de3 result, different first party: 533752c71d058f8e5bd6b847ef112f4df11690b9605ca1a44a45f361e11cb53d, d384c0132de6f0fe0b18d1b02ae914963ee98765729a082cc7feea7e09dac8a1, ecffe9fe9b52350bbdfbb4550f9f7633cf954b141e709377f51b05feda816b54, d5cf98189760590aff41dfac22e3d2e316d927cb70ac1c410528628d26168792, d2375bcdaffaaa5661ba1146c48f02e7980a4ff8b2bbfd598636fc7b04a16666 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: ca7bca055aefb71078deb7381103b4f340a7b8de46b8618188367f2c49b2835a, a7d54b4dabb7a004f5280afe61a26c0764abc2a525d58eaac69088174d6f0fab, ad00bde268d0e70097736a71984892b2e64357be8c070f4400bc1b8beb20848b, 54b27fb0a9d14146b5e773327c464e21aa926b12af9051b75fc420080ce86d34, 75e56bb548903ec1bd992846b4a89e72ec03b750e4879789094bd94edb5e4084 result, different first party: a8d11e4b54b3c346199a6175f00eafbe740e4baf18cf9c8592ad1db5388ccbfb, 1f56d0112f98ac16bbde20e8f7994cd96ac5ade5a22cced97974b1fce2b75226, ba819254bfb214ab5d12c684afb23a810fcb3076a4eb4b893efdf593ee366549, 04213c32fc5d81f23a43c1d28b7307eb0879cc5860170f0d21aa6f012873acd2, 6394cc4f78ce3a40f5aea85caff48450766415581afadac836f8b3ec1fa120ea 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: dc0422e273d6e8d09f99833f8e9c421f81b4459c59832aea9199fa154e56dddb, 39acb556e3717f05f61e38542812a7456b8c237031947e0ceeb8109ba07fb75b, bc8aebf907db3d6251ce0f4b98a11ef9690928d2a542775d3cc4d2b91acd335d, 1bc43cf0b10fbef4ed1f04d2e6a6583fa27888b33defee7724d0288f6edea83a, f86d89e3d48c1e419902733324f1acdc6877ffc76f28c016b334b42158977a67 result, different first party: 467604f95c0eeea8336cb25068573b66675c53a89ccad1d6d1fcfbf859b94efc, 37474250545d190415d8e32e28cce9b55f73b3f2cd559f774dde759b5ce7b114, 1313fb3c0f8c30de89250806e0a52984bc8fdc5afd6841f1e5e430632810f63e, 6464072b90609bdb79d3cffb65fba604912c4b3cc8d5dea4be2ba4d2b3fad654, 152828dfbbe57895a68bb2c69c3ddc74dde36cb6fe2850171e9c12fbee44406c 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: 5580b8f33703ed6528f8ebcc946cb517457f55109ac815f62c1ecffbfbb575e6, 86205cee2a992bb4eeb20161ab3d8ab80156b6c8b90311a2bb02c4045e0b4ea2, 20e78821e2713a9dd79b75af36d10d7f79e6e36db92760edb0d9e86d2b734b56, 0473a1e777c13d91c6de7a3a156ca49ebf44f29e13b4b5fb3279b0a6d279a2cc, 5f8125cd727b715eac595a1f4d755fc09082890989bfe29efa05f9fc78cd339d result, different first party: 845a0956692d58f07b18cffc6a1043e3a85920b558a78f6e262a464b19e27d99, 572ef6261629e4c8e1d0d676218e95175ed3417b683277af624c6f52a31a9fb5, f76d54bab2d5269cf5b8a79d67a2408bbab0de9e9ce443ec3b964a944f845cca, 2f0e25e9a2c032ac791bc738b7b0ad24d32ca70534b775f61c5fe5911af81f88, 154078de26a7f1de2ed574cdd0fade7631bcd04571c84f8d4da96a25f0d2d798 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: edc382c588e691bb27f05433cdef1cc4ffeb5d906b5e499d1591212fb70afe97, e85cc30d61e03923728079703e927239f8d7a00c535b7dda951147a508631a43, eebba684ac5e4ae89554d2ada226dc174521450b76a1427d85125f4bcea059c2, ee9d592327c9d53f7112a24377bd79af4f43e3b6be5349ecaf75d3809be01587, cb4e19a1357b22fd0dd487e860730575ce68226b6cb93088cf24c74cde7befa1 result, different first party: c7f9bbefaf0c2dd4d901f0fbca361d9513c9b7a98632dda97f3bae7555d4b0db, d179a382e93d41afce94386baa4e28dbc110e600c19c4a0f8268668f7d8bcb3e, f5de0cf13f4450ba2b654af37dc8e3b61c9c5c5cd3049eb56704033e0cb9bf3a, 82b7510bfc6303f0e3202ad9b99586eb45d8c68b3abe11f00dc798530e2b7366, c22efc134ee274b1abc0650ef514f95f3974f31ecc34f9836e5225fbae95f353 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: 0c68c4c0c52a5553c053a72d736da7a0b7f7eb95d3744c71f9fbb9fe07a92648, bcfa171e393189a9b7d54391e10552754cd9f97ad7f91dc0e7a3d65c73ad2181, 7195696fc15d35c8389699a51f66e3f825474989d7e2ca161e1a96a54a2f18f0, ddaa021936bc5dca86e0afef47596afd83ce9ae51d42b8de1adb2057624826da, 0dc8602794262a6252f1cad08fcb6b781c69f0f88be821bca55609587861717b result, different first party: 42e5275ff1a21a9e0032e25195ea7e01a6a7e36b30ce5648af146225c8f3605a, b9f336aac23f2e6b607a5d8826fd88d75996060ea400e77d9b608dd17f3cd3cc, 3577e2a6d54bb70367af52cbf117d7ae0c03596cf5d280a2345b13523ee9f27b, e2873d7560fa56c959697681c659f8af7559a2bc5f82b503b1c64b964f5f5083, 02340e3811b3a131d8f8a33513cacdfb3dbf4d9f98a12960d90dcc02fa6336de 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: fd758a74c4767bf0350797a551f5d750c8a0901cf3ec07832cacd95b7c1cf5b3, bb8006a2333142e85b36c68673b9aef7e1db15d5864e4dd674074481692e5e76, 386b4bcd995db8bb2f7dc37a5e8f8ab94bf7d3b55cc17016f71472f340d18082, 4fe1dd7d409c1c28f54620a7fceaa61f92850ea354e608845e6579faa7de134b, 895f91cc1b0fe863e24ed2036213543e59199836a4131ee2e57315d5fd191662 result, different first party: 040f8e0a0786a35ec766ce217bc05257fb0e47d82d95f450ac34411c10ecce2b, 5ff94563d9102dca5ba69afb578553952f576a7bdd9bb6c446494898408fa193, 3f33a7065e262ceaac61f76ac33357b1bcb22bad3ec187159b0a1a9751b8841f, d3420635b8e888dab7271bf8c9ff3ce780b7c45675092c68f27a2dff8c3031a2, 848f411e93bcaa9478b825a3cfa55e472d2f2a066b145a09ab61fc5aa492d001 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: cf6eea62ceb9e2b3c9eff52bcd479ba824fe29d15825dce1d7950b149ea0486f, 2dc2c1b9fbbbd773ac41dab6bb2621bd39236074d2a966dad477a3482bc20826, 8e6f03d1b720f0f66f01d45e82a2511fa938399797ca74315002fb6935e936b5, ccd5a61dba86b9713920cd563b811344d06c81ba1fc5f395175be7184d5468b1 result, different first party: ffe7ff414909b183be5a4ef481daa6b2d0737f8404cab1a16923ebcd6e2caaba, b1230b6c906178adb2e62bf8227f7dca304ab050d14178a1efce2eb1fb963a5a, 53091234ca38ee84943f8fbacc77d297029000b23b78b810cf17183c92611b7b, f8760f96ba1dfe4b46667fa9a76e2517220ee4cfc9fc69167252c3634eac8dab 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: 32e72e05c44e94e19671f7448c970572a4e2017f631797dab7e0b8514b2b0b05, d24935bb8b6c0fba33eafcb376f2e48632f738143f43443ae43f23242c1f26d5, 54d5d10852783ec815c455201d6669159795125c168150f9e50c9533968fca19, 5ff17e8cf650399b014a3135201bc07a2282ef9b2cdb40d4f091248b4cb7faa3, 9238c4dc0b69f0414554eb679d22011ff9d5b1c2108b3a41b3fd51945b9805b4 result, different first party: f7f9e2107cf169e921c22fd0cea094a69022a9ac507b2a6bd23d76f1141092b1, 4cf229a43dbe439b482474d0358eef6b48b4fb154029f2c0c24b02419b223559, 76a5169327575c3c1eb288db53e6fbb9f03c4b94aba689d54125f37e7eac4fa5, 924d968ad984a1865ec34a78d9fcb4316e96a351d4af233eb86bc4163b1c8d17, 3b2098b4fac244940e5e6ec722998dcba6c30940ee8e3e21095272c12b8eeb2b 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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts., Error: Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in third party contexts. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("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: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: 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, 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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false 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: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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
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: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:27:34 GMT, Thu, 02 Dec 2021 23:28:03 GMT, Thu, 02 Dec 2021 23:28:31 GMT, Thu, 02 Dec 2021 23:28:59 GMT, Thu, 02 Dec 2021 23:29:26 GMT result, different first party: Thu, 02 Dec 2021 20:28:44 GMT, Thu, 02 Dec 2021 20:28:44 GMT, Thu, 02 Dec 2021 20:28:44 GMT, Thu, 02 Dec 2021 20:28:44 GMT, Thu, 02 Dec 2021 20:28:44 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:29:55 GMT, Thu, 02 Dec 2021 23:30:25 GMT, Thu, 02 Dec 2021 23:30:56 GMT, Thu, 02 Dec 2021 23:31:26 GMT, Thu, 02 Dec 2021 23:31:56 GMT result, different first party: Thu, 02 Dec 2021 23:30:05 GMT, Thu, 02 Dec 2021 23:30:36 GMT, Thu, 02 Dec 2021 23:31:06 GMT, Thu, 02 Dec 2021 23:31:36 GMT, Thu, 02 Dec 2021 23:32:06 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:32:35 GMT, Thu, 02 Dec 2021 23:39:55 GMT, Thu, 02 Dec 2021 23:42:09 GMT, Thu, 02 Dec 2021 23:44:06 GMT result, different first party: Thu, 02 Dec 2021 23:33:21 GMT, Thu, 02 Dec 2021 23:40:53 GMT, Thu, 02 Dec 2021 23:42:56 GMT, Thu, 02 Dec 2021 23:44:54 GMT unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:45:59 GMT, Thu, 02 Dec 2021 23:46:25 GMT, Thu, 02 Dec 2021 23:56:23 GMT, Thu, 02 Dec 2021 23:56:52 GMT result, different first party: Thu, 02 Dec 2021 20:46:07 GMT, Thu, 02 Dec 2021 20:46:07 GMT, Thu, 02 Dec 2021 20:46:07 GMT, Thu, 02 Dec 2021 20:46:07 GMT unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:57:20 GMT, Thu, 02 Dec 2021 23:57:47 GMT, Thu, 02 Dec 2021 23:58:15 GMT, Thu, 02 Dec 2021 23:58:42 GMT, Thu, 02 Dec 2021 23:59:09 GMT result, different first party: Thu, 02 Dec 2021 23:57:27 GMT, Thu, 02 Dec 2021 23:57:54 GMT, Thu, 02 Dec 2021 23:58:22 GMT, Thu, 02 Dec 2021 23:58:49 GMT, Thu, 02 Dec 2021 23:59:16 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:59:36 GMT, Fri, 03 Dec 2021 00:00:00 GMT, Fri, 03 Dec 2021 00:00:24 GMT, Fri, 03 Dec 2021 00:00:48 GMT, Fri, 03 Dec 2021 00:01:12 GMT result, different first party: Thu, 02 Dec 2021 20:50:31 GMT, Thu, 02 Dec 2021 20:50:31 GMT, Thu, 02 Dec 2021 20:50:31 GMT, Thu, 02 Dec 2021 20:50:31 GMT, Thu, 02 Dec 2021 20:50:31 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Fri, 03 Dec 2021 00:01:57 GMT, Fri, 03 Dec 2021 00:02:22 GMT, Fri, 03 Dec 2021 00:02:48 GMT, Fri, 03 Dec 2021 00:03:12 GMT, Fri, 03 Dec 2021 00:03:38 GMT result, different first party: Fri, 03 Dec 2021 00:02:03 GMT, Fri, 03 Dec 2021 00:02:29 GMT, Fri, 03 Dec 2021 00:02:54 GMT, Fri, 03 Dec 2021 00:03:19 GMT, Fri, 03 Dec 2021 00:03:44 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Fri, 03 Dec 2021 00:04:02 GMT, Fri, 03 Dec 2021 00:04:26 GMT, Fri, 03 Dec 2021 00:04:51 GMT, Fri, 03 Dec 2021 00:05:15 GMT, Fri, 03 Dec 2021 00:05:39 GMT result, different first party: Thu, 02 Dec 2021 20:56:06 GMT, Thu, 02 Dec 2021 20:56:06 GMT, Thu, 02 Dec 2021 20:56:06 GMT, Thu, 02 Dec 2021 20:56:06 GMT, Thu, 02 Dec 2021 20:56:06 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Fri, 03 Dec 2021 00:06:04 GMT, Fri, 03 Dec 2021 00:06:30 GMT, Fri, 03 Dec 2021 00:06:56 GMT, Fri, 03 Dec 2021 00:07:22 GMT, Fri, 03 Dec 2021 00:07:49 GMT result, different first party: Fri, 03 Dec 2021 00:06:11 GMT, Fri, 03 Dec 2021 00:06:37 GMT, Fri, 03 Dec 2021 00:07:03 GMT, Fri, 03 Dec 2021 00:07:29 GMT, Fri, 03 Dec 2021 00:07:55 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:08:37 GMT, Thu, 02 Dec 2021 23:09:11 GMT, Thu, 02 Dec 2021 23:09:44 GMT, Thu, 02 Dec 2021 23:10:18 GMT, Thu, 02 Dec 2021 23:10:51 GMT result, different first party: Thu, 02 Dec 2021 19:15:41 GMT, Thu, 02 Dec 2021 19:15:41 GMT, Thu, 02 Dec 2021 19:15:41 GMT, Thu, 02 Dec 2021 19:15:41 GMT, Thu, 02 Dec 2021 19:15:41 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:11:38 GMT, Thu, 02 Dec 2021 23:12:22 GMT, Thu, 02 Dec 2021 23:13:06 GMT, Thu, 02 Dec 2021 23:13:43 GMT, Thu, 02 Dec 2021 23:14:29 GMT result, different first party: Thu, 02 Dec 2021 23:11:44 GMT, Thu, 02 Dec 2021 23:12:28 GMT, Thu, 02 Dec 2021 23:13:12 GMT, Thu, 02 Dec 2021 19:15:41 GMT, Thu, 02 Dec 2021 23:14:35 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 02 Dec 2021 23:15:23 GMT, Thu, 02 Dec 2021 23:17:57 GMT, Thu, 02 Dec 2021 23:20:36 GMT, Thu, 02 Dec 2021 23:23:09 GMT, Thu, 02 Dec 2021 23:25:36 GMT result, different first party: Thu, 02 Dec 2021 23:16:17 GMT, Thu, 02 Dec 2021 23:19:02 GMT, Thu, 02 Dec 2021 23:21:32 GMT, Thu, 02 Dec 2021 23:24:04 GMT, Thu, 02 Dec 2021 23:26:30 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Fri, 03 Dec 2021 00:08:35 GMT, Fri, 03 Dec 2021 00:09:20 GMT, Fri, 03 Dec 2021 01:26:40 GMT, Fri, 03 Dec 2021 01:27:25 GMT result, different first party: Fri, 03 Dec 2021 00:08:41 GMT, Fri, 03 Dec 2021 00:08:41 GMT, Fri, 03 Dec 2021 00:08:41 GMT, Fri, 03 Dec 2021 00:08:41 GMT unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Fri, 03 Dec 2021 01:28:11 GMT, Fri, 03 Dec 2021 01:28:56 GMT, Fri, 03 Dec 2021 01:29:42 GMT, Fri, 03 Dec 2021 01:30:29 GMT, Fri, 03 Dec 2021 01:31:15 GMT result, different first party: Fri, 03 Dec 2021 01:28:17 GMT, Fri, 03 Dec 2021 01:29:03 GMT, Fri, 03 Dec 2021 01:29:49 GMT, Fri, 03 Dec 2021 01:30:35 GMT, Fri, 03 Dec 2021 01:31:21 GMT 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/ 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/ 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
  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
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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 result, different first party: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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: 37f0f939-4df8-4013-832a-0d9689ac9960, ba35dd76-67f1-4e57-a5e5-8d067900db3c, 4b805a3f-8357-4cef-88ce-6cb57a0b1ad3, a3150014-4496-4d55-8ccb-53f7deb1ec35, eb7e1f71-c4f0-490a-909c-671c2c5acec5 result, different first party: 37f0f939-4df8-4013-832a-0d9689ac9960, ba35dd76-67f1-4e57-a5e5-8d067900db3c, 4b805a3f-8357-4cef-88ce-6cb57a0b1ad3, a3150014-4496-4d55-8ccb-53f7deb1ec35, eb7e1f71-c4f0-490a-909c-671c2c5acec5 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: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => sessionStorage.setItem("secret", secret) read: () => sessionStorage.getItem("secret") result, same first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 result, different first party: 2f4578ea-1c47-455a-af53-5b119ffa03a5, 0695c870-2c4f-4de5-a94b-47d25f4cb6cc, 75facd88-d26e-4dd8-ba1d-2d6ad52c4f14, cf783b3e-1ee8-4832-b39d-34f87ead8802, 097e78d9-1c6e-4b84-8157-d1f5a33d1dc7 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: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 result, different first party: 65050166-fb93-4176-ad44-3b3dd9ecdd68, 1682bb32-fdeb-4800-8555-0bd03da8bdc6, 081152f5-ded4-4475-ae7b-5dfe9c1715d4, 6e81e8f0-64d2-4ae9-8e88-07f20ee630f4, 1bdd1d9c-424a-4721-b8c2-d4fe2967ccb3 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: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 result, different first party: a7885da0-bc2b-42de-b770-21f42d858b6f, 29ac89a7-6f44-4c33-abce-edeecc783501, bb326207-d367-4417-9680-0858f2d1e5e7, 96063bd6-529a-43df-93bf-31f3c3cf3c29 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: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 result, different first party: e9b1ebf9-3f5e-499a-b648-2adc7dfe2bec, 97b1c9fe-139d-4ca4-83e1-2e3a5b4f84be, eb34e581-461d-4584-8fbc-eb0710fbdd23, 906e2f38-7b08-4c2c-a196-c39570a68109 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: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 result, different first party: d21fe23c-d572-40bc-996b-c11000574c85, fdc3dc58-e95d-4422-b268-77a92e2ace58, 54dd883b-f06b-4920-8eb4-da325f44dad4, 30a6037a-2753-427f-9a7f-902b984e485c, 98d40577-2eae-4568-8b6d-e1fa71387404 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: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 result, different first party: a42605e7-9620-4231-aa24-6ababa8c79b6, 3d3df6af-f182-4315-be9f-ee3616bdb8fe, 659bdb81-bcd3-48b0-b2c2-bc5a36f8326c, 09ef908b-7c91-48d9-acb5-35922271430e, 2e90d196-9c4b-4166-bb5b-7922321fbde7 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: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 result, different first party: 5b03c046-097a-4bb6-8514-41b53767c308, 8ebcf96a-f495-4685-b447-507e0a743644, e81d359f-65ee-4d7e-bbce-bcd7f929e44e, e02abe52-0a9d-4824-a06a-5897d67e41dc, 15c0a52c-8d6a-46ab-b489-b4ba4fb98b12 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: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 result, different first party: 6f552686-0b32-4133-9f41-e87615fe4da1, 7bc62174-3453-4e5b-843f-7f95ac0491db, 53c24814-e013-48d9-a2a1-df87e6865ead, 347e69f8-5b33-4759-a19c-5faf3e62477e, 79b8d460-42d5-4acd-8b86-6f1e54f93312 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: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 result, different first party: deb6039e-9668-4234-9460-9bd546a01276, 376cfced-4cca-4a2c-b00a-28a1310a237d, c2a65c38-1645-4e34-b38d-de27e16ea324, 12c9bc15-bf9f-407a-8011-076dc32c453e, 336b24b7-ca60-494a-ac90-b64ad63f2eb2 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: ad647fb2-dbc5-4349-a659-a3f3471b563b, 155dd362-f005-472a-a4cf-b3e353e2673f, 3cf2b7f8-1b8c-47a4-a054-1d5e29dc7999, 913185ef-31a3-443e-8c1e-c2c83f64e243, e9292361-386a-4e4b-a8a3-6d4722f5cf46 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: 37f0f939-4df8-4013-832a-0d9689ac9960, ba35dd76-67f1-4e57-a5e5-8d067900db3c, 4b805a3f-8357-4cef-88ce-6cb57a0b1ad3, a3150014-4496-4d55-8ccb-53f7deb1ec35, eb7e1f71-c4f0-490a-909c-671c2c5acec5 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: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 result, different first party: 66303e51-dbd4-4a40-99c5-b10578c13dba, 641f51e3-26e1-4fea-bbfa-9716ef662afc, 64d593a1-c4e8-47bc-ba3b-ff076cc6ff91, f4421cc9-0bb7-409c-8395-6df59e3722c9, 91f2484a-370d-43af-a0b0-093d767c78f6 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: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc result, different first party: 559b805e-c5f5-4df9-9ff9-506c64624caa, 44d20802-6e5a-44a3-a20c-e5a8ffd21b49, 5342b259-2cb9-4f3d-83e1-87e226850229, 57a6d38b-142b-4cf5-b8d6-84eae8d72bdc 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: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca result, different first party: 7e8ce7e0-3cda-422c-ba62-1ad79f033476, e35358b3-cc86-4c79-a83e-7e7d59102e72, 9f8113b5-c153-4f49-a82b-8f2559127e4d, 4a9d9dd5-33f3-462d-810f-bb9e367f9f2e, 67a5ace8-0189-4f35-9c6d-882b2c405cca 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 result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: 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: 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
Upgradable addressChecks to see if an insecure address entered into the browser's address bar is upgraded to HTTPS whenever possible.
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false passed: false,false,false,false
  upgraded: false,false,false,false passed: false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false passed: false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
Upgradable hyperlinkChecks to see if the user has clicked on a hyperlink to an insecure address, if the browser upgrades that address to HTTPS whenever possible.
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false passed: false,false,false,false
  upgraded: false,false,false,false passed: false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false passed: false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
Upgradable imageChecks to see if the browser attempts to upgrade an insecure address for an image to HTTPS whenever possible.
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true result: upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true result: upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,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: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: true,true,true,true result: upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
Upgradable scriptChecks to see if the browser attempts to upgrade an insecure address for an script to HTTPS whenever possible.
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true result: blocked,blocked,blocked,blocked
  passed: true,true,true,true result: blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true result: 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 enabledThe 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.
  sec-gpc: 1 passed: true,true,true,true,true
  sec-gpc: 1 passed: true,true,true,true,true
  sec-gpc: 1 passed: true,true,true,true
  passed: false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false
  passed: false,false,false,false,false
IP address leakIP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address.
  passed: false,false,false,false,false
  passed: false,false,false,false,true
  passed: true,true,true,true
  passed: true,true,false,true
  passed: false,true,true,false,true
  passed: true,false,false,true,false
  passed: true,false,true,false,false
  passed: true,false,true,false,false
  passed: false,false,false,false,false
  passed: false,false,false,true,false
  passed: false,false,false,true,false
  passed: true,true,true,true,true
  passed: false,false,true,true
  passed: true,true,false,true,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: false,false,false,false readSameFirstParty: 185.31.175.215,178.20.55.18,199.249.230.102,185.220.101.48 readDifferentFirstParty: 185.31.175.215,178.20.55.18,199.249.230.102,185.220.101.48 passed: false,false,false,false testFailed: false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
  write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: false,false,false,false,false readSameFirstParty: 2a0b:f4c2:2::57,2a0b:f4c2:1::1,2a0b:f4c2:1::1,185.83.214.69,2a0b:f4c2:1::1 readDifferentFirstParty: 23.236.146.162,104.244.73.85,2605:6400:30:f339:4b1c:e34b:741c:174f,2a00:74a0:e000:1003::114,2a0b:f4c1::7 passed: true,true,true,true,true testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
Tor enabledThe Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default.
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: true,true,true,true passed: true,true,true,true
  IsTorExit: false,false,false,false passed: false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: true,true,true,true,true passed: true,true,true,true,true
  IsTorExit: false,false,false,false passed: false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
Fingerprinting resistance 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: 1296,1296,1296,1296,1296 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1296,1296,1296,1296,1296 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1296,1296,1296,1296 passed: false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1292,1292,1292,1292 passed: false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1292,1292,1292,1292,1292 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: 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: 956,956,956,956,956 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 956,956,956,956,956 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: 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: 1000,1000,1000,1000,1000 desired value: 1000,1000,1000,1000,1000 passed: true,true,true,true,true
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1278,1237,1237,1237 passed: 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: 1200,1200,1200,1200,1200 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1200,1200,1200,1200 passed: false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1200,1200,1200,1200 passed: false,false,false,false
  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: 2560,2560,2560,2560,2560 passed: true,true,true,true,true
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 2560,2560,2560,2560,2560 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: 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: 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: 1000,1000,1000,1000,1000 desired value: 1000,1000,1000,1000,1000 passed: true,true,true,true,true
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1405,1405,1405,1405 passed: 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: 1371,1371,1371,1371,1371 desired value: 1296,1296,1296,1296,1296 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371,1371 desired value: 1296,1296,1296,1296,1296 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371 desired value: 1296,1296,1296,1296 passed: false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371 desired value: 1292,1292,1292,1292 passed: false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371,1371 desired value: 1292,1292,1292,1292,1292 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: 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: 1061,1061,1061,1061,1061 desired value: 956,956,956,956,956 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1061,1061,1061,1061,1061 desired value: 956,956,956,956,956 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: 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: 1000,1000,1000,1000,1000 desired value: 1000,1000,1000,1000,1000 passed: true,true,true,true,true
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371 desired value: 1278,1237,1237,1237 passed: 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: 1296,1296,1296,1296,1296 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1296,1296,1296,1296,1296 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1296,1296,1296,1296 passed: false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1292,1292,1292,1292 passed: false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1292,1292,1292,1292,1292 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: 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: 956,956,956,956,956 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 956,956,956,956,956 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: 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: 1000,1000,1000,1000,1000 desired value: 1000,1000,1000,1000,1000 passed: true,true,true,true,true
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1278,1237,1237,1237 passed: 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: 1200,1200,1200,1200,1200 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1200,1200,1200,1200 passed: false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1200,1200,1200,1200 passed: false,false,false,false
  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: 2560,2560,2560,2560,2560 passed: true,true,true,true,true
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 2560,2560,2560,2560,2560 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: 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: 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: 1000,1000,1000,1000,1000 desired value: 1000,1000,1000,1000,1000 passed: true,true,true,true,true
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1405,1405,1405,1405 passed: 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: 363,363,363,363,363 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 363,363,363,363,363 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 363,363,363,363 desired value: 0,0,0,0 passed: false,false,false,false
  expression: screenX desired expression: 0 actual value: 2582,2582,2582,2582 desired value: 0,0,0,0 passed: false,false,false,false
  expression: screenX desired expression: 0 actual value: 2582,2582,2582,2582,2582 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: 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: 400,400,400,400,400 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 360,360,360,360,360 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 192,192,192,192,221 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 221,221,221,192,2810 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: 2582,2582,2582,2582 desired value: 0,0,0,0 passed: false,false,false,false
  expression: screenX desired expression: 0 actual value: 2582,2582,2582,2582,2582 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: 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: 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: 25,25,25,25 desired value: 0,0,0,0 passed: false,false,false,false
  expression: screenY desired expression: 0 actual value: 47,47,47,47 desired value: 0,0,0,0 passed: false,false,false,false
  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: 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: 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: 282,282,282,282,282 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 242,242,242,242,242 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 152,152,152,152,181 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 181,181,181,152,210 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: 47,47,47,47 desired value: 0,0,0,0 passed: false,false,false,false
  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
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
  expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: 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: 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: true,true,true,true,true
  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
  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
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
__hsscHubSpot tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
__hstcHubSpot tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
__sDrip.com email address tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
_hsencHubSpot tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
_openstatYandex tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
dclidDoubleClick Click ID (Google)
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
fbclidFacebook Click Identifier
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
gclidGoogle Click Identifier
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
hsCtaTrackingHubSpot tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
igshidInstagram tracking parameter
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
mc_eidMailchimp Email ID (email recipient's address)
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
mkt_tokAdobe Marketo tracking parameter
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
ml_subscriberMailerLite email tracking
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
ml_subscriber_hashMailerLite email tracking
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
msclkidMicrosoft Click ID
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
oly_anon_idOmeda marketing 'anonymous' customer id
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
oly_enc_idOmeda marketing 'known' customer id
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
rb_clickidUnknown high-entropy tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
s_cidAdobe Site Catalyst tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
vero_convVero tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
vero_idVero tracking parameter
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
wickedidWicked Reports e-commerce tracking
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
yclidYandex Click ID
  passed: true,true,true,true,true
  passed: true,true,true,true,true
  passed: true,true,true,true
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false
  value: 5435080965863142 passed: false,false,false,false
  value: 5435080965863142 passed: false,false,false,false,false