Desktop Browsers
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brave
1.32

brave
1.32

private

brave
1.32

Tor

chrome
96.0

chrome
96.0

private

edge
96.0

edge
96.0

private

firefox
94.0

firefox
94.0

private

opera
82.0

opera
82.0

private

safari
15.1

safari
15.1

private

tor
11.0

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, 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: h3, h3, h3, h3, h3 result, different first party: h2, h3, h2, h3, h2 unsupported: false, true, false, true, false passed: true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h2, h2, h2, h2, h2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: 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, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async () => { // Clear Alt-Svc caching first. let responseText = ""; for (let i = 0; i < 10 && responseText !== "h2"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/clear"); console.log("clear", responseText, i); await sleepMs(10); } if (responseText !== "h2") { // Clearing failed. throw new Error("Unsupported"); } // Store "h3" state in Alt-Svc cache for (let i = 0; i < 10 && responseText !== "h3"; ++i) { responseText = await fetchText("https://h3.arthuredelstein.net:4433/protocol"); console.log("protocol", responseText, i); await sleepMs(10); } if (responseText !== "h3") { // Storage failed. throw new Error("Unsupported"); } } read: () => fetchText("https://h3.arthuredelstein.net:4433/protocol") result, same first party: h3, h3, h3, h3, h3 result, different first party: h3, h3, h3, h3, h3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
blobA 'blob URL' is a local reference to some raw data. Trackers can use a blob URL to share data between websites.
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${baseURI}/blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`); } catch (e) { throw new Error("Unsupported"); } } read: async (secret) => { let response = await fetch(`${baseURI}/blob?mode=read&key=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 result, different first party: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 result, different first party: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 result, different first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e result, different first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f result, different first party: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a result, different first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 result, different first party: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed result, different first party: Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed, Error: Load failed unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d result, different first party: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e result, different first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b 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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f 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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a result, different first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel result, different first party: Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel result, different first party: Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel, Error: Can't find variable: BroadcastChannel unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: (secret) => { try { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data === "request") { bc.postMessage(secret); } }; } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let bc = new BroadcastChannel("secrets"); bc.onmessage = (event) => { if (event.data !== "request") { resolve(event.data); } }; bc.postMessage("request"); setTimeout(() => reject({message: "no BroadcastChannel message"}), 3000); }) result, same first party: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d result, different first party: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 58069814-89fe-4628-9bba-ae01813fb084, 58069814-89fe-4628-9bba-ae01813fb084, 58069814-89fe-4628-9bba-ae01813fb084, 58069814-89fe-4628-9bba-ae01813fb084, 58069814-89fe-4628-9bba-ae01813fb084 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842 result, different first party: 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842, 27a05d75-839b-406c-8454-e65d4a957842 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 6046401262584151, 6046401262584151, 6046401262584151, 6046401262584151, 6046401262584151 result, different first party: 6046401262584151, 6046401262584151, 6046401262584151, 6046401262584151, 6046401262584151 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 41279462570029524, 41279462570029524, 41279462570029524, 41279462570029524, 41279462570029524 result, different first party: 41279462570029524, 41279462570029524, 41279462570029524, 41279462570029524, 41279462570029524 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. result, different first party: Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure., Error: The operation is insecure. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 8847123413332609, 8847123413332609, 8847123413332609, 8847123413332609, 8847123413332609 result, different first party: 8847123413332609, 8847123413332609, 8847123413332609, 8847123413332609, 8847123413332609 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') result, different first party: Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url'), Error: undefined is not an object (evaluating 'cacheKeys[0].url') unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 6254449813902438, 6254449813902438, 6254449813902438, 6254449813902438, 6254449813902438 result, different first party: 6254449813902438, 6254449813902438, 6254449813902438, 6254449813902438, 6254449813902438 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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_4609495738522804, fake_32019323543797906, fake_802889588017542, fake_017940903288236054, fake_8413432014191464 result, different first party: fake_31394189517697146, fake_15124167751993545, fake_08608200505908381, fake_5312284662277853, fake_9301682809316592 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_2798728549260925, fake_06114275859118368, fake_2376284535092974, fake_4508479104861991, fake_28134198021915235 result, different first party: fake_9365798115519555, fake_34668340065360925, fake_06814984532771118, fake_15091280487244751, fake_7243783305032334 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_2974862023501319, fake_7149586642685288, fake_5295060726541998, fake_9250149321105601 result, different first party: fake_2974862023501319, fake_8798232593356763, fake_5295060726541998, fake_9250149321105601 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_13720420137909017, fake_9610014867356431, fake_36337416483188734, fake_7648800468263748, fake_8949090817395573 result, different first party: fake_13720420137909017, fake_9610014867356431, fake_36337416483188734, fake_7648800468263748, fake_8949090817395573 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_6446909302615174, fake_868324296983348, fake_8897026568275186, fake_06677329904866847, fake_320528889563946 result, different first party: fake_6446909302615174, fake_868324296983348, fake_8897026568275186, fake_06677329904866847, fake_320528889563946 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_4440104582261819, fake_27582441342001984, fake_722445023737319, fake_26939853261041136, fake_656151183608831 result, different first party: fake_4440104582261819, fake_27582441342001984, fake_722445023737319, fake_26939853261041136, fake_656151183608831 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_6155487052735096, fake_4731298989031716, fake_20429665918150475, fake_9079354314256349, fake_9424010235719824 result, different first party: fake_6155487052735096, fake_4731298989031716, fake_20429665918150475, fake_9079354314256349, fake_9424010235719824 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_09655583924781519, fake_22947827594547743, fake_9394595261973313, fake_46695581778654116, fake_1545537842449436 result, different first party: fake_8809466942855051, fake_36674273077040587, fake_10101049565514342, fake_6626629578602534, fake_2994633296316782 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_9703458922893815, fake_06428212066459715, fake_373679388601744, fake_7194488648930952, fake_6214139956295972 result, different first party: fake_522437139140709, fake_7731630514614194, fake_6423673573744395, fake_24582235726672774, fake_6642705784877287 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_5902614675107922, fake_04007464056574972, fake_39956057226479746, fake_5174531509960199, fake_8451922778886141 result, different first party: fake_16785591720865733, fake_04007464056574972, fake_39956057226479746, fake_5174531509960199, fake_5693503311261869 unsupported: false, false, false, false, false passed: true, 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_37161221681239964, fake_29740353045858847, fake_2101569844499711, fake_8336602569523266, fake_5007029906818694 result, different first party: fake_02070120171264378, fake_6904450001346554, fake_9215213157914379, fake_17748489957312907, fake_9058573725099468 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_1234489947717139, fake_7780212471309311, fake_2931382999007164, fake_6979850753841057, fake_04171249788254139 result, different first party: fake_6393759306772306, fake_7013143235342845, fake_9193139290186025, fake_5173175840743913, fake_5844035068058939 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_7850724291430375, fake_16574331643808193, fake_4582687788650013, fake_21982647643512054, fake_03601055724118929 result, different first party: fake_28710785606053624, fake_453070878866936, fake_3039182783784653, fake_8063227465296203, fake_8088143908133989 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_5695428298252538, fake_8342768497029283, fake_45064472223769214, fake_3477900504151519, fake_39436002865313946 result, different first party: fake_6178127854510578, fake_21139871832003432, fake_4469423011313274, fake_06878860708130241, fake_620717456072847 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_04825193020827112, fake_7439983096851555, fake_6691426100585238, fake_5457245845946908, fake_7321210037563965 result, different first party: fake_9910451219909655, fake_7439983096851555, fake_6691426100585238, fake_5457245845946908, fake_7321210037563965 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_5963041292756461, fake_9469764991100507, fake_14942606206294973, fake_0398348073087571, fake_8995506513109097 result, different first party: fake_3294512586672187, fake_7457318159595456, fake_597103972608608, fake_24971137127239817, fake_1027918502129952 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, 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: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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, 2, 1, 1, 1 result, different first party: 1, 3, 1, 1, 1 unsupported: false, false, false, false, false passed: false, true, 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, 2 result, different first party: 2, 2, 2, 2, 2 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: 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, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); return key; } read: async (key) => { let response = await fetch(testURI("resource", "fetch", key), {cache: "force-cache"}); let countResponse = await fetch(testURI("ctr", "fetch", key), {cache: "reload"}); return (await countResponse.text()).trim(); } result, same first party: 1, 1, 1, 1, 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, 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
  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
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, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 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
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); return key; } read: async (key) => { let style = document.createElement("style"); style.type='text/css'; let fontURI = testURI("resource", "font", key); style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`; document.getElementsByTagName("head")[0].appendChild(style); await sleepMs(500); let response = await fetch( testURI("ctr", "font", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e result, different first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a result, different first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 result, different first party: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d result, different first party: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 result, different first party: , , , unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e result, different first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a result, different first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 result, different first party: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d result, different first party: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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: cfd32542ec95737a36105d09d120f468, c544ce06e4dcdfdbdd1b9c3ccf7fea36, f064ba8035bc82a7ef12dbf59f0f5f7b, 5202e0cf9e92f74388b5c70e596ec598, ac78f9d2780202ff07c58420ad519a9b result, different first party: 8e932cac079cd43db17c45103a9560b0, 245d82338c24b59aa796489dbaad3252, 053962f49040da604668e2ec1d72a1da, 3f39d0f4ac68d509c9a7641e07d2810c, dff3665674534e021ae6ef50adf07f0a 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: 34d6f90749f5d3d63ca694bfb75f11d7, 42be88aa7a205121654c656c631a159d, 69dbb3abbeebea36be4abba0b11da01c, f6c0ff09c8320f13a942bdb90ad5b587, e5589f48a70ecc06a0325ea1f903a470 result, different first party: 897389105cd8300d82754495cdd31ad1, d79355bca6c2d6628562d6ef6490b931, 4a13983f69d37c2c17fa6128a078d9ff, 11d085201f42b7e5d9f433e551c8558d, 88f91ae0ec8339c13848255c849e7289 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: 1d4c8ec59669f0cf66bb32902f708722, 8bdcd6ab845a019f0bff793d4c4c3d60, eac1b32cb543d162db199d2d58a28bb2, 25e92baa2d6169e719e7d696202c2ce2, 35a2a0d4c3064e0c03c6d00631ca3932 result, different first party: 1d4c8ec59669f0cf66bb32902f708722, 8bdcd6ab845a019f0bff793d4c4c3d60, eac1b32cb543d162db199d2d58a28bb2, 25e92baa2d6169e719e7d696202c2ce2, 35a2a0d4c3064e0c03c6d00631ca3932 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: e09ec6ac82e5b1db03ae1cb4c8f506ae, 9b4e53975c8f09577a2cb485a87af7c5, acc15ee762a29ef1c837c054cf503b8f, 9fa473d1f02bfe86dcebed5815051d3c, a7b9f1ebcc4c8b60ae18ea479d3b0195 result, different first party: e09ec6ac82e5b1db03ae1cb4c8f506ae, 9b4e53975c8f09577a2cb485a87af7c5, acc15ee762a29ef1c837c054cf503b8f, 9fa473d1f02bfe86dcebed5815051d3c, a7b9f1ebcc4c8b60ae18ea479d3b0195 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: f34a06732951501e6bc2c1d98af6ccd3, b731f541588c716fd5c5d12f24381146, f83bcfaf7cf74aa3f3061e7dab4be9ce, aef268b9305d8c2574e299748b560d7a, 0a522dfc88381b2e4e2ac6edcfe08f2a result, different first party: f34a06732951501e6bc2c1d98af6ccd3, b731f541588c716fd5c5d12f24381146, f83bcfaf7cf74aa3f3061e7dab4be9ce, aef268b9305d8c2574e299748b560d7a, 0a522dfc88381b2e4e2ac6edcfe08f2a 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: 66004d1d7090d04874b04776ebc7daec, ddb4c045a6098d655bfc9efc4c35b3ef, e7dad49d3e74d4f624769c184c4a8406, f2be5ee568aead10ad2ed35bcb7b211b, cb99f454d40b3b0025c410e32a12d608 result, different first party: 66004d1d7090d04874b04776ebc7daec, ddb4c045a6098d655bfc9efc4c35b3ef, e7dad49d3e74d4f624769c184c4a8406, f2be5ee568aead10ad2ed35bcb7b211b, cb99f454d40b3b0025c410e32a12d608 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: 6dfc1640f2e5eb4808ad480786561c87, fd9a4ba34bc25897b4e6c7770610188f, 04246ffc78c0fecd9f7802f15c7e39a6, 71cf95caf23d9b6acbb9a4d46e6d40e6, 7515532486e5e7781d5b7bb7e1c2230d result, different first party: ffebde91e47ada631214e0ec01cb14d7, f465375a5e0eaeaee1d5145486cbcdb1, 2cf8ed6851af7a07eeb8db2a9d8cd5b7, 49522c84c5bceafe46b9234767461ebd, 3f1e8412c6ac898629a0e0becde5341a 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: 9150d7d49d5c7ffd17b9c16ba715f296, ba2d174c8b2f277fd04f450102ce57c0, be6c62d0537d56be4dbe79d5564eb01c, 647672f9ff86af90d4c2122ca3599883, 8d10410524b525b9bc5c6c2b8fbeddf0 result, different first party: 0a8d259623fb575d956f399b30e4ddbb, f3ebe04ebca9c00de4ce1e2fee418d96, f6f3190b59d728f007b45da2a634346d, , 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: f3951ccfff932c097ab289464ca77768, 0c3acf59732286b1640de3946d32de03, dd05aeb7aa2d507291d4ec467b743dc4, 0b4bf9c3570f72dfa884b296c6b11d5e, fbf30045e516657ee1decf8eaed6cfd7 result, different first party: f3951ccfff932c097ab289464ca77768, 0c3acf59732286b1640de3946d32de03, dd05aeb7aa2d507291d4ec467b743dc4, 0b4bf9c3570f72dfa884b296c6b11d5e, fbf30045e516657ee1decf8eaed6cfd7 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: 7262f0698408cfc96880be7733bacf89, 0b1434c01605e25fa4d5a29a0b756caa, 7d950b81b77a34bf6ae8f3ba4343e883, af12fd0c3837c95daca07aa46723d1f1, 46e97b73ee3feac06f9b79201fdc7e29 result, different first party: 7262f0698408cfc96880be7733bacf89, 0b1434c01605e25fa4d5a29a0b756caa, 7d950b81b77a34bf6ae8f3ba4343e883, af12fd0c3837c95daca07aa46723d1f1, 46e97b73ee3feac06f9b79201fdc7e29 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: 820a2e4ed956ffe610351a7617c62b2a, 01ba44ee31100df4cb0ba8c88e51b94b, 940d8ee6b763ad6a747e22add9f8fea2, 7f940c8cdc944991fc32ff1fe953ee17, 7131d0b1f18945f420df790fba8423f6 result, different first party: 820a2e4ed956ffe610351a7617c62b2a, 01ba44ee31100df4cb0ba8c88e51b94b, 940d8ee6b763ad6a747e22add9f8fea2, 7f940c8cdc944991fc32ff1fe953ee17, 7131d0b1f18945f420df790fba8423f6 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: 622721e5f1d6888184b8cc5025c16b31, c68133cde648484a0895470978de2af9, 5e988cff0f6f9f7d16078bfe648c9272, e22dcd5348e3e77ef4eff5f5f963c9e1, f7a9cc45ce08358a38bedb76994bd02a result, different first party: 622721e5f1d6888184b8cc5025c16b31, c68133cde648484a0895470978de2af9, 5e988cff0f6f9f7d16078bfe648c9272, e22dcd5348e3e77ef4eff5f5f963c9e1, f7a9cc45ce08358a38bedb76994bd02a 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, 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: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed unsupported: false, false, false, false, false passed: true, true, true, true, true 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: Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed, Error: image load failed unsupported: false, false, false, false, false passed: true, true, true, true, true 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, 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
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, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); iframe.addEventListener("load", () => resolve(key), {once: true}); iframe.src = testURI("resource", "page", key); }) read: async (key) => { let iframe = document.createElement("iframe"); document.body.appendChild(iframe); let iframeLoadPromise = new Promise((resolve, reject) => { iframe.addEventListener("load", resolve, {once: true}); }); let address = testURI("resource", "page", key); iframe.src = address; await iframeLoadPromise; let response = await fetch( testURI("ctr", "page", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 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, 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
  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
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, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 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
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b 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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations. result, different first party: Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations., Error: A mutation operation was attempted on a database that did not allow mutations. unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (secret) => { try { return await IdbKeyVal.set("secret", secret); } catch (e) { throw new Error("Unsupported"); } } read: () => IdbKeyVal.get("secret") result, same first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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: undefined result, different first party: undefined unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b 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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f 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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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: , , , , result, different first party: , , , , unsupported: false, false, false, false, false passed: undefined test failed: true, true, true, true, true
  write: (secret) => localStorage.setItem("secret", secret) read: () => localStorage.getItem("secret") result, same first party: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b 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: 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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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, 2, 1, 1 unsupported: false, false, false, false passed: false, true, 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, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 1, 1, 1, 2 unsupported: false, false, false, false, false passed: true, false, false, false, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received result, different first party: Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received, Error: No requests received unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 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, 1 result, different first party: 2, 1, 1, 2, 1 unsupported: false, false, false, false, false passed: true, false, false, true, false test failed: false, false, false, false, false
  write: async (key) => { let 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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 result, different first party: Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker., Error: Failed to register a ServiceWorker for scope ('https://arthuredelstein.net/test-pages/') with script ('https://arthuredelstein.net/test-pages/serviceWorker.js'): The user denied permission to use Service Worker. unsupported: false, false, false, false passed: true, true, true, true test failed: false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined result, different first party: Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined, Error: navigator.serviceWorker is undefined unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 68aad028-b2cd-4f6f-b782-d05b9776ec14, b1e4db92-3b0b-438b-bc9f-357ba15945aa, 21d3a145-8a28-43df-b450-0af4d5766bcc, 98450965-6315-4eaa-a215-10ac2e8fd340, 1f38176b-fba4-407c-8aea-4b2c5b9b2199 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b 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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f result, different first party: undefined unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { try { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage(secret); } catch (e) { throw new Error("Unsupported"); } } read: () => new Promise((resolve, reject) => { let worker = new SharedWorker("supercookies_sharedworker.js"); worker.port.start(); worker.port.postMessage("request"); worker.port.onmessage = (e) => resolve(e.data); setTimeout(() => reject("no SharedWorker message received"), 100); }) result, same first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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: df48c1f8467fe112af9bfec09d081fce6104cb6316fec4d51e41873715d43456, a6ffb80de0ce205b34d67a710c537c0fd22b1d9c7f9f9cca6b4b0835cd5a90f3, 900b27947b12f2223ce721dcf4e4888c8bfb15d599f96b119113fd2e3a643779, aad150f1fd9f6e0e84c6c6cce50d1bd93ce6b002976e47b96e7767fa94ee501e, 0fec4ceaaeebf9b2b2c9fb8aa303585726eb4eef0da420eb890d38d1eccf982e result, different first party: 043036883096bd988b35b21e0e32abadc14548d2fb90e8e9d9b26c6689c77baa, 0430be5db58de44ace7537f6a57e7420e305183cb4bb352836a36674d9d59d5e, 0430e42d33bc7521a323b3e6d58c4aef26c517dd78dd39074be809392691f995, 043058b3d54150dd8e1e6722c2fcaa64772bb62e0a61c8c06e72c85e933910fc, 0430ff8de4a9ba22c191db79454e9ebcbae9f66e55772ba04e727a63216e587f 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: 0297ec0d5ae8c6b950d66740d874a334304ca4722e43f43408c3eb1f97fe2693, 6896721166637a4df299d27ba7928a44a7d3e9d3e3ef5f44a69dac6c0349cbfe, 3467db827982c41e637801620b45be0a037e35fef49e34e554e18e019dea5175, f70c2479a13e92cc78d04a09bef337151d3ce80af58682db8d3bccecea64651a, 9439a5d7af7f073f5c4a01914de929553b005adbc6d636a17b330033e2288766 result, different first party: 0430d1be2273645c9219653b8488fe6486a4d4da07303bcec84902d9467998c7, 0430ea71e5ee304e563057a9a20f3fc4dcd4662d36ad1e2d02b87c1f8ab88841, 0430fdb15375d7e5f5b31ab8119a14118307586013f71bfece8600672457a4ee, 04305e3aee3bd79887f199ddb6eb8fde11e640bd6c676909a419b6f682793109, 0430891729043fa1432efebab502163c429a3cb6222e1a40249c089c4ccb8e8f 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: 047881fd4874b13f2bc327ec6de9357651aab3307f8e44eba4f29095580aebfd, 1fcc4808eb74582400cb06f985bc2cc1c70cfdcb8baf5abc6dfa90447aaced1e, a40f76ecfb245e9c8539e12dae1547b73ff6fd10071b216b79e0b1f4f7aceff6, 647ef86f4bc9859a1ff3375f1cc622b6f777c663e01540127d5dd4a8749d9be1 result, different first party: 0430ca336aac8b55be97c7acbe4d1c4408dc54d38993d8bb90a923e09baa77a9, 0430e9cd1819eb5a835c1501ca607b6a7cf902488d81e883eec8a878444dd0f3, 0430036ba3cc65836e4a95d7f32bf21e881cff3eb2aba4762b530e02d5ec2b94, 04308bb1a4159f757eec5bc665944d0798729091093b9945d7f48ba76601e481 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: 7d73d3b63a330a5414b9cf5b9ec7846fb564f532f14c1663b01a8c6190232cf6, 06fb2c331fc184dc12f4d972159367c086797ce4888fe95e03ba8e15429666d5, 6a00dab1634568ffd26e64b0fc9902e56ac5f5b05cbdbb686d4386b180b0bd41, e49b0463939c574e4f7d2cb129f111897f5c1fdf02879cad04415cce4f891756, d85b9c3f54e8fd17f77a063b6dbe49b472996d4b031af779157e0252d7ce6771 result, different first party: f8159fdd73c5e3e73a21962c635f226add30f0f664fd803d09d94755de2bd369, 4656b7084d07013c81920bc938a036c0057520133ff98865ce56f30d22d134b7, be8a35024462cc9c8706f069a3f4cfb7e68fffe5956026159e8f1552dfe8a933, 9daa2abb5500a944974a061c19b9c9e59b230998ae752ead6b8a72ee7649c49e, b65b4c6e56f6121dfe40d11b4ed61549b06cf0f63eb06b7db527339d11f8ee99 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: cc17de6155658aed5a5c7c757b4c68f0a442e914e0d72d59fe87945b0f80103e, 01db398c9cfc0329d81421655817f2108d63f956f7f3a16a9416848a79ebc30c, 830bf8eff5a70a425b148aaef7aae060073e0804e6fcd9dc2342a131dd67be4f, 049fa57ffbf7742fd529380760eb9fdf007bd9f13b0b779d566570cf049cbabd, 8daab4deaee35a2e735dc09c12514f1e5d3e05ea8fc4a7c252e3b97d14f5e7b3 result, different first party: 50d42ef3d7483e7595a4d294b17f59cfc128682615140b4390519a18e7900af1, 6f65103274af0cd43d92e4e210b6d4db07acdf36b50d81fb5076564134422ba7, cbc19de27c8b478f2360afda8376532d2a4ac8788eb79765660b76cd14812f2b, e7c9daa200020725e2c2610f7f7792ffabe9f8770ec42282c29ffa7eb7d0f053, 3038f09ac5c8b90c7e221e7646d9565cdcf386652de5dab3e20b47b7bbab60d3 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: 1b2c3649d5f2652d23256590023e7131e13e8e384cb8d2b573eaf8f66a315126, c5f52c0231dd68a7b9cca21b86afd04de1765a9b75bb44f550d5acd551b53ad1, c5cecf8f8916431b77d5830ded704cc61e305278909d929e84a1c6caa5df3005, d6786d5d0d4054a74c06db009099cdfd496393eb998e9b25794576a221009f6d, 4ed05c42fccd69740ad3545ac3dbb8a6847c96805361f25c3083a8cb1c1dc235 result, different first party: 27e26019dcb6202168c67d7e77f910391cf90e8819bc3953c31e3ff8404baaed, bc729684d55096a0cb3cd8fc45c332e5061fbba2fbf56305259a8587d2c0801d, 554a460e0d027fab4970142236bd90e9cd41a6d8c8846293d79fc7b2cb654086, bf9e53108e397a750625a1331e1f28cbfa31797ad59522a7f8f647d40c6da9e5, 58515dd88592f4822a0d3d7c74732c33d56fa8a191a70964561a7e52d161aa9d 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: dd22cb57e7ad7e9b367f8f43b2af351b3735a2dd5b68fef9563804a15a68b589, 62e166084aa22c0aafa70f58d098ca01d40de8ca2de2746a89470c6f24150a78, 5d0100aa84dffa6ccb6878a5e85f403db0b98d96b0c1597192c2a4515959df6e, 95dc372e225ea6e20a72c29d12ff0ef54c8d3c5763a22910afbeb941351307f8, 41fc5218204aa653394d298ea1abcf87b33894dc3a3783acb6a33f85775f5acd result, different first party: 3564b4946debf5753bae226f5ab46d008ccf6e70d2a9494ecfea66c75554015f, 0dcc1cb76ca0eb744c66c5c9972a5ed936cbec6c6279c6f69c0aae56a16ad93a, 75a0d80530064d1941601c25ea36b9d03e306e40a5890bb5336dfba73e8e6476, 4a667ed536b6cf8529fc7a2e77ab19c8ef99fc31b20d1b7f02dd18c133bb3b9f, 7d8388c7e57543cdd9d41017a6efb15c08eb9eebcd01ffb10301c81e29c30e72 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: 845ace886855afdd05e3e0ed5fc526c802b7f59c34fbbc37fb5024c0606910b5, 4d256570b425680411b973d40cb7a000ef21d115708c286f4dc89789fd275354, 02051628bc418be39101c09ea6ac5fdaf8ddf91998e5b72c2da042527790df61, bd00b418d761c48dd908ab508f98020cd6d41eb69dd6850fb05e6fcb5b4e9b46, e2b3318868b487b696fee198b72040c96c7025ff56f129a6dd2d53bc34951423 result, different first party: 0430271a3b140af7599bc8f071fe8221416754af6c0426559da0603c5f7a73c8, 04307ee8fbc49096988fac2701863da110616d63feabe0d29298c30735e1343f, 04307436c77f0f2c4cc1cce92b4fa481d84f96e7b72de0202b6c9d56a602ae1b, 0430b88556dc22ccceb5b341ed86c97cccb3f992cf174cfbe5336fbd6f4166a3, 0430bd3b15963ebf9755ed6f1abbedfcb7ff591e673dda9f7447ec2adab03af4 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: 1d5a14d8307469201a58302ab2d6736361c603ec72bc5f6b45b33e84e7b2eab8, 5f52c34b93f7945e7468dec3145b75393020513a54474de56de29aaf0e2ed96a, 8c173f806ee06b5b17270bfaa773547b15657d3b3613c93a549894658c551738, ca76add462071bb2d0d7adaeb62c6c755dfb0d1b4d3f3bfbca6cb70401179f0b, f8f3e2af4f3d34443f8514c0448f0d5ad6fba889e1914a3394671d2dae29d61a result, different first party: 3351f661e7448eee19e6e750eaaab38f2db8aed0d63eb778f6af0214a4586593, 61cd3ee69127fd7c60a4f4c198584f3fea54a956a3d3367202770a4abbdc0bbb, 04814c5bbc3114e5cf227985c34101436aa48948f9d2c33bc9ea839ecdb80858, de97e26f1a7701f43f8ee360576bfd1444dd908822ea59a22a83d0e8d21bf212, 0028b5bd32b92ae02a30f88913ee02c571521afe9b6af4e36f5e2e7b2eebc97b 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: 0f8279c93979ad039c4b36fbdf6c6bcf109d67ac5bbccee36bef7c3030520f9a, c33d45ff243619e93510dcbab6483e1ec74da6c2214dad2abb455fa085062a2f, 5462f356d6368a5d2ceb948e7820fda87af0ef965fadbc2c19c832fb064aa842, 9e441b2cfe8450f254cb6ffaaa7fa5ca9a24990960bb38137c3ed1d874e42c52, 688cd19967c6d545edcebb6f0efc3764e0bc81a99f54948fc6edb3293c5becd9 result, different first party: f2e29cc5f6fa3119980571f47f820fc8341f1b20594b6489ecd15db740da7f5e, 85d0b22608f16cfe1ab444bca15590ace2bf20ec21330c1ca18652961a225372, fda73effc20f48aaaa9bf31176af13787f547ae30a1fff4eacffa0493a4b8701, 93c1e2d678f279c78843e34b8a7732578f4dac46815dad47582fe37fc0558102, 1c64822f6c1385f1cc066f1010f7d7dbfce3abaae90d46fd110cdd0f4be0c748 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: c419e128658dabe398283f38115169f81211e9c92b7ab85e1e7b205393776a11, 893a3bff9f031fa6f70045c3472d2ab56eeceb3249cbd8e236e118f59fe906a3, c26c434941c9ece618fee35ba91b2dad3e29f840e67ac7767b5a2c60580becce, f7d2d1d69b1486a47aa042bc863d6929c125b58903b075ace27f7a1ed221dcca, 5d72fd715f3cbbc238e959a380d15abd65977e0a38555894b2f8c3b558377af7 result, different first party: 4716f3045c8834da9bd48c6bb3a19c9cdd41f66d04676d697d6e7beb4b68a406, 6868827abbf8b2f0d9ae0d0fd37f42694c4f1e9dd57f0c038db3d671fe766168, 93378c24686a9df374d3d2787d93e4cb9d9d08048b16123f6b7a72cb722d5df0, 69846c2367c383d976ea158db83ad3cbfac1ad0ec010258ed4048f48ee009aa5, 7694610fa608d6ed29277b560cadfbacf5b9f6af9f7a0b59db4152d64960916c 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: 9574e6e5ab47002b7a626fb459dc1e43031450d1c4a0683999f7380f1f448694, 0668e36db51409c12d8eb1bf32ec9e6ab3acd82f7a9ecfb70594ced8b8243a60, 47c88d7dffeb2ed7431f59160f252352d5c0b8aa412db33781a700d9abfb761f, 0e57902a5773c344b539611dc42c2dce9265cf695887a3577ee2c10cdccccb41, 50078152214c87003e1dff124f5e2dfa04dd9a6dd87f2d09f1b355328c675437 result, different first party: a35673c63e1862a2f5350e760265a6406526258e2f3b3974fd26a3af49f319fd, dab140ff5e6c9386806ad9ef68b4127041975a903cfe4e65e1f907c40c5568de, 7c3c471a0a82583d0bbbd46f7ab84e2c948d8584d6f5e6bba7d83717cea7947f, 6c2840be57ef942278e624600ef2aa886031d43037029e875d7affaf10a311b6, 85d213438da8b207712c092b4d7bc1310e5e574e2b8af238c3aaab77bc6a6b42 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: 02ac7f8407b779c7d2268cf3244ba1780a1ffa82be78da8e0d0248695f0e589d, 9941ec03af3b55e83a61930ec0375069d696f5bd83874b43b70aa7612c4b9619, 1cfc274a0deaf6ec666a29321bcb2996542914b4d5b534816ab1787290cf6300, fbabeab9fa317506dc79d73da8e3d147f321c1b8e6993d3e88ca21c2e04b9eca, 48883e9222cbd19be211b0bd330dd795ad1e0b83080d39d18664ff5746129b45 result, different first party: df282699ed6ede5266756b911eb90d84e08fa73fd80fe6283fea026ba06152d4, 107c80082e24f16a22fe3066daa442f92a78c87d6afbfa29f7631f8f2383d3f0, f9ddda103a1a52cba5e97fd44f0f832739e38f18489c8f120504d1ad9c8ee61c, 575b34a17460fabf65b460bf68f8b71ba35dacd1945be66cc5439e8c723b18d5, 0d252670b1f3981d1e6be175647a0cf767763ddf8467eeb1229dccb3d3ae0d2a 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: 9ff4633ed3a0014651d25ac61bb62dbefc568627c58762fefaa004f9986d8f19, 32efc47ccee5d5c53df22ac5683ae7dc4c025bee80a1d7341979cb16d0d0d208, 67701974c2b5e7a24cbe91277590ac587febea5f874a0c6c053c6837da91d511, ffb4b373458d6e4ce02f9daf9d0f8b1d6acb4c47739f1e1de9dca7fd8d834d9d, 85b54a70453f469e927e75fefa60fc1943bf807eba3657d3ec2cb7239372d2b9 result, different first party: 0b5ed4159154475f73e25e4dd9e33f65fa04ebd32a629f180a0433668ee3064c, 940847f1f07bd8ffbb120b9db3315966cdd7c8ae3600ca6d94ba1fb4ba8bff90, 315d9712c452847e7344e24c5cad42bc44ad52eaef52153f514e8a69e750e483, e05382bf3d46520d688ffb2e7cb20c07351d1a294ad55fa69402197ee2b4f0c0, af3ce0f0c5f735beff09cbe019fd9f74a86b18d36be5695b3416a3111d27a16a 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: 79973bad2bebb2a843360218c500fa6ea5ec745a256ea188433f0121c82c9ddb, d120b8e3db97c3bcd2bd980ff6b6eb02f122d6faf21722fa40bb2aeeaa60c1d6, cb04b567639c71b0a6f88fcce5decde69ae9d0780452ff770045c4a23c0c09e3, d930d4ea72511beecd98898c2a2e42e5859aaaa18435411a3467385de3db39a5, b78aff0a99d44e8b0ba1bdaf2462dfde57ab6400e23a4068cfc30b40664e222d result, different first party: 3eb200d2df65a8f3754757c430ee592b6052ed993ab257503d9e7f3d650d7ceb, a5c3d43776dddf04f7be87400e86fbcb7f61523afc7e33f47467fc557a87a757, 59c8b3a048f8718d81371aff6473707c58af1e8e58326c24a1eac683bbec28b9, 1dd28432fbc358ac8eda52463f6777bf6a272fcf6b342a77cddebb24f9cf1cd9, e72815d794d8af8a7f62e425c2970ae6084627ad18abbc54b0e096125893ef61 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: 795c05c42807cfd5dbb4108530c38ce642c6896eb286a9d7d5a92004c2ceec11, 01fc10c95374ac785dd383c028ad87b6572f45e682a8013eaad1943e28353fec, f111ef6a78665bd490389ff6ba0603cd684b1397cbd1cd7443d4527af6cbf053, 3c661972742eb4fc394119d30587851d6ba2189dd91a82c44d0c862c7cf44404, df21224052d1fd9d9aee7d72c78c5a2dda6d0e9018f3e78ee921c88dc45fe872 result, different first party: 51908c7d4360b7ab2e3cf12ea0a3b9bb4e3993fbd9abca50262c45418e7c7410, 98b55d0ea0d57947c62ca6c30a8efed4a65fb94f29638fab5e0aad6cd2b01f21, 22d01f45d9bd8c1368be16e0051589f22409e11cad415ebd1043b12b6962a291, 6cf8e31d9cb2befac37e06d4a6c1203d438a42fc7909f9aa83b1c00ab9f780b7, 319248e89eab041c9348669b64cf72155e3eeea3edae26556b9a02d79459ea33 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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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) => { 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function result, different first party: Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function, Error: window.openDatabase is not a function unsupported: true, true, true, true, true passed: undefined test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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) => { 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!window.openDatabase) { throw new Error("Unsupported"); } let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let tx = new Promise((resolve) => database.transaction(tx => { tx.executeSql( `CREATE TABLE IF NOT EXISTS cache( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, value TEXT NOT NULL, UNIQUE (name) )`, [], (tx, rs) => {}, (tx, err) => {}); tx.executeSql( `INSERT OR REPLACE INTO cache(name, value) VALUES(?, ?)`, ["secret", key], (tx, rs) => {}, (tx, rs) => {}); })); } read: async () => { let database = window.openDatabase("sqlite_supercookie", "", "supercookie", 1024 * 1024); let result = await new Promise((resolve, reject) => database.transaction(tx => { tx.executeSql( "SELECT value FROM cache WHERE name=?", ["secret"], (tx, rs) => resolve(rs), (tx, err) => reject(err)); })); return result.rows.item(0).value; } result, same first party: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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 17:30:20 GMT, Thu, 02 Dec 2021 17:30:49 GMT, Thu, 02 Dec 2021 17:31:19 GMT, Thu, 02 Dec 2021 17:31:47 GMT, Thu, 02 Dec 2021 17:32:15 GMT result, different first party: Thu, 02 Dec 2021 00:05:39 GMT, Thu, 02 Dec 2021 00:05:39 GMT, Thu, 02 Dec 2021 00:05:39 GMT, Thu, 02 Dec 2021 00:05:39 GMT, Thu, 02 Dec 2021 00:05:39 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 17:32:44 GMT, Thu, 02 Dec 2021 17:33:14 GMT, Thu, 02 Dec 2021 17:33:44 GMT, Thu, 02 Dec 2021 17:34:15 GMT, Thu, 02 Dec 2021 17:34:46 GMT result, different first party: Thu, 02 Dec 2021 17:32:54 GMT, Thu, 02 Dec 2021 17:33:24 GMT, Thu, 02 Dec 2021 17:33:55 GMT, Thu, 02 Dec 2021 17:34:25 GMT, Thu, 02 Dec 2021 17:34:57 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 17:35:26 GMT, Thu, 02 Dec 2021 17:42:26 GMT, Thu, 02 Dec 2021 17:44:11 GMT, Thu, 02 Dec 2021 17:46:03 GMT result, different first party: Thu, 02 Dec 2021 17:36:09 GMT, Thu, 02 Dec 2021 17:43:07 GMT, Thu, 02 Dec 2021 17:44:59 GMT, Thu, 02 Dec 2021 17:46:50 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 17:47:52 GMT, Thu, 02 Dec 2021 17:48:16 GMT, Thu, 02 Dec 2021 17:48:41 GMT, Thu, 02 Dec 2021 17:49:05 GMT, Thu, 02 Dec 2021 17:49:28 GMT result, different first party: Wed, 01 Dec 2021 22:32:23 GMT, Wed, 01 Dec 2021 22:32:23 GMT, Wed, 01 Dec 2021 22:32:23 GMT, Wed, 01 Dec 2021 22:32:23 GMT, Wed, 01 Dec 2021 22:32:23 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 17:49:53 GMT, Thu, 02 Dec 2021 17:50:19 GMT, Thu, 02 Dec 2021 17:50:45 GMT, Thu, 02 Dec 2021 17:51:10 GMT, Thu, 02 Dec 2021 17:51:36 GMT result, different first party: Thu, 02 Dec 2021 17:50:00 GMT, Thu, 02 Dec 2021 17:50:25 GMT, Thu, 02 Dec 2021 17:50:51 GMT, Thu, 02 Dec 2021 17:51:17 GMT, Thu, 02 Dec 2021 17:51:42 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 17:52:02 GMT, Thu, 02 Dec 2021 17:52:26 GMT, Thu, 02 Dec 2021 17:52:50 GMT, Thu, 02 Dec 2021 17:53:14 GMT, Thu, 02 Dec 2021 17:53:38 GMT result, different first party: Wed, 01 Dec 2021 23:22:29 GMT, Wed, 01 Dec 2021 23:22:29 GMT, Wed, 01 Dec 2021 23:22:29 GMT, Wed, 01 Dec 2021 23:22:29 GMT, Wed, 01 Dec 2021 23:22:29 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 17:54:03 GMT, Thu, 02 Dec 2021 17:54:28 GMT, Thu, 02 Dec 2021 17:54:54 GMT, Thu, 02 Dec 2021 17:55:20 GMT, Thu, 02 Dec 2021 17:55:45 GMT result, different first party: Thu, 02 Dec 2021 17:54:09 GMT, Thu, 02 Dec 2021 17:54:35 GMT, Thu, 02 Dec 2021 17:55:00 GMT, Thu, 02 Dec 2021 17:55:26 GMT, Thu, 02 Dec 2021 17:55:51 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 17:12:44 GMT, Thu, 02 Dec 2021 17:13:09 GMT, Thu, 02 Dec 2021 17:13:34 GMT, Thu, 02 Dec 2021 17:13:59 GMT, Thu, 02 Dec 2021 17:14:24 GMT result, different first party: Wed, 01 Dec 2021 22:45:27 GMT, Wed, 01 Dec 2021 22:45:27 GMT, Wed, 01 Dec 2021 22:45:27 GMT, Wed, 01 Dec 2021 22:45:27 GMT, Wed, 01 Dec 2021 22:45:27 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 17:14:49 GMT, Thu, 02 Dec 2021 17:15:18 GMT, Thu, 02 Dec 2021 17:15:47 GMT, Thu, 02 Dec 2021 17:16:16 GMT, Thu, 02 Dec 2021 17:16:46 GMT result, different first party: Thu, 02 Dec 2021 17:14:59 GMT, Thu, 02 Dec 2021 17:15:28 GMT, Thu, 02 Dec 2021 17:15:57 GMT, Thu, 02 Dec 2021 17:16:26 GMT, Thu, 02 Dec 2021 17:16:55 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 17:56:11 GMT, Thu, 02 Dec 2021 17:56:35 GMT, Thu, 02 Dec 2021 17:56:59 GMT, Thu, 02 Dec 2021 17:57:23 GMT, Thu, 02 Dec 2021 17:57:47 GMT result, different first party: Wed, 01 Dec 2021 23:26:43 GMT, Wed, 01 Dec 2021 23:26:43 GMT, Wed, 01 Dec 2021 23:26:43 GMT, Wed, 01 Dec 2021 23:26:43 GMT, Wed, 01 Dec 2021 23:26:43 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 17:58:13 GMT, Thu, 02 Dec 2021 17:58:39 GMT, Thu, 02 Dec 2021 17:59:05 GMT, Thu, 02 Dec 2021 17:59:31 GMT, Thu, 02 Dec 2021 17:59:58 GMT result, different first party: Thu, 02 Dec 2021 17:58:19 GMT, Thu, 02 Dec 2021 17:58:45 GMT, Thu, 02 Dec 2021 17:59:12 GMT, Thu, 02 Dec 2021 17:59:38 GMT, Thu, 02 Dec 2021 18:00:05 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 17:07:06 GMT, Thu, 02 Dec 2021 17:07:38 GMT, Thu, 02 Dec 2021 17:08:08 GMT, Thu, 02 Dec 2021 17:08:38 GMT, Thu, 02 Dec 2021 17:09:08 GMT result, different first party: Wed, 01 Dec 2021 22:39:51 GMT, Wed, 01 Dec 2021 22:39:51 GMT, Wed, 01 Dec 2021 22:39:51 GMT, Wed, 01 Dec 2021 22:39:51 GMT, Wed, 01 Dec 2021 22:39:51 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 17:09:48 GMT, Thu, 02 Dec 2021 17:10:27 GMT, Thu, 02 Dec 2021 17:11:04 GMT, Thu, 02 Dec 2021 17:11:42 GMT, Thu, 02 Dec 2021 17:12:20 GMT result, different first party: Thu, 02 Dec 2021 17:09:52 GMT, Thu, 02 Dec 2021 17:10:30 GMT, Thu, 02 Dec 2021 17:11:08 GMT, Thu, 02 Dec 2021 17:11:46 GMT, Thu, 02 Dec 2021 17:12:24 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 17:17:44 GMT, Thu, 02 Dec 2021 17:20:21 GMT, Thu, 02 Dec 2021 17:22:51 GMT, Thu, 02 Dec 2021 17:25:30 GMT, Thu, 02 Dec 2021 17:28:26 GMT result, different first party: Thu, 02 Dec 2021 17:18:43 GMT, Thu, 02 Dec 2021 17:21:16 GMT, Thu, 02 Dec 2021 17:23:53 GMT, Thu, 02 Dec 2021 17:26:42 GMT, Thu, 02 Dec 2021 17:29:19 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 18:00:45 GMT, Thu, 02 Dec 2021 18:01:30 GMT, Thu, 02 Dec 2021 18:02:15 GMT, Thu, 02 Dec 2021 18:02:59 GMT, Thu, 02 Dec 2021 18:03:52 GMT result, different first party: Thu, 02 Dec 2021 18:00:51 GMT, Thu, 02 Dec 2021 18:00:51 GMT, Thu, 02 Dec 2021 18:00:51 GMT, Thu, 02 Dec 2021 18:00:51 GMT, Thu, 02 Dec 2021 18:00:51 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 18:04:50 GMT, Thu, 02 Dec 2021 18:05:38 GMT, Thu, 02 Dec 2021 18:06:27 GMT, Thu, 02 Dec 2021 18:07:13 GMT, Thu, 02 Dec 2021 18:08:00 GMT result, different first party: Thu, 02 Dec 2021 18:04:57 GMT, Thu, 02 Dec 2021 18:05:46 GMT, Thu, 02 Dec 2021 18:06:34 GMT, Thu, 02 Dec 2021 18:07:20 GMT, Thu, 02 Dec 2021 18:08:07 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/, 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/, 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
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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b 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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a result, different first party: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f 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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 result, different first party: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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: 68aad028-b2cd-4f6f-b782-d05b9776ec14, b1e4db92-3b0b-438b-bc9f-357ba15945aa, 21d3a145-8a28-43df-b450-0af4d5766bcc, 98450965-6315-4eaa-a215-10ac2e8fd340, 1f38176b-fba4-407c-8aea-4b2c5b9b2199 result, different first party: 68aad028-b2cd-4f6f-b782-d05b9776ec14, b1e4db92-3b0b-438b-bc9f-357ba15945aa, 21d3a145-8a28-43df-b450-0af4d5766bcc, 98450965-6315-4eaa-a215-10ac2e8fd340, 1f38176b-fba4-407c-8aea-4b2c5b9b2199 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: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 result, different first party: 8142cd8a-cfcc-4ec5-aa34-bb4842486b63, 2614322f-45f2-4285-ae17-9fccaff834ca, 707f7afb-b589-4794-aa7d-0d619f00596d, c8351c5a-5467-4b1a-9fa5-1bd545e16c77, 82c1abf0-5dfb-4d1b-baa4-5700d4dbbda7 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: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 result, different first party: 4d869ed2-de1a-47fc-a32e-082038220eda, d35daa94-dfb7-48ce-bb1b-ab8086fc239a, 68494080-4be1-4c3f-b30b-8afc13b31ad2, 9cadbf17-4492-4474-ab64-52e1cf423da1, 7137674a-4015-44a4-88c3-55cd7832ac21 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: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 result, different first party: 7f6340e9-3508-4b77-8ce6-172fe5c1da13, 3b795d5b-bcaa-4b82-b1a9-f35e0e27379c, 66054576-8b0a-4d7d-9f0e-309050c09f82, 9091752d-5681-4b43-adba-5fa3a090dfe1 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: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 result, different first party: 8bc55b55-2c87-4ccf-9083-284ec6dbc4e2, 4cef98ef-f91a-47cf-b6ed-e03e4e1f2a78, a405f1c5-59fb-4142-b292-1a8fd9cc2d0f, e3743b6a-738c-43ff-9bf9-db81c4a6ea02, adbabb97-390f-4e58-959d-476e4937fec4 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: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e result, different first party: dc5602f7-b0c8-4ddb-84c2-939308a7dca5, 7728850e-e9cc-4ccf-8fd4-6dfc4f1c4c8b, 921755a9-a4ee-4369-ab7c-7457b25deeec, 5cfb2e8e-2ad6-492a-8ef1-a593838c441d, 943c10e8-4d3e-47dd-91af-cf45f6a88d0e 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: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 result, different first party: a0192a3f-0022-4bd4-bf2a-ea2cddcaedd0, 85fa09ec-0d83-454d-a5f7-477e97ced683, a2e37c71-fbaa-416a-a960-25cd7924e1de, 51cefd19-c1d5-435b-8164-680c0102ca07, 1157dcf3-11c5-47ff-b198-44054a571c50 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: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b result, different first party: 76ca6e5a-6eb4-42f7-8664-00b0af884995, b31079b4-5fc1-4404-8d13-f69befaef87e, 415a9d7d-f104-48cc-bdae-2d1d8194773d, b152d748-ecdf-4429-8cbe-363aa03e5417, e8b1707e-7eaa-4b7d-877f-c1d72401b24b 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: 2b617d86-c214-4544-aa30-3bcea728d727, 271a6195-9644-4873-89d9-718ae52157e0, 27f8ae12-9ddc-4a52-8801-07f6cbf4673e, eeac4324-a949-4e7d-a350-ff941c0960a1, dfdd1220-ad05-425a-a1c4-46e31688739a 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: 5955eecf-d3b2-4fe2-ac23-48f9574d58be, 9efc7430-a210-43a7-bfd2-4e7c05b0d54a, 74d12fcd-6a1d-4695-b333-f0a4f686adc3, 94755cc7-7d61-45ba-9478-d28b980b256f, 65fae723-9a89-4de7-abac-854e7f70060f 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: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f result, different first party: 7360973e-f589-4f9a-95e6-955c34936257, 0178ade6-81cf-4b8d-9466-7d8ded7cc0ac, ad272651-515b-4ad1-8531-faea41548882, 0ba82af2-b69b-47cf-a530-37719a8de8d0, ac74c976-c181-4a33-8ff5-c2da7555ad2f 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: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a result, different first party: 6495350f-2729-48a5-ba96-8ac9f3ff59a8, 1513c1c5-6477-4ab4-9cc0-3fed01e0b3e5, e8bb7309-e21f-4ae1-a479-05907cb87e7a, 0cbe628a-7567-4a86-96b7-47eaa77e42ce, 723b261b-e951-4807-a67c-bed0f052e88a 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: 1d072eb3-9367-4d28-b9ad-6f30433a7e4b, 482dacb3-4b5b-47ad-b084-53a88026d5c1, b64a0d0f-d928-421e-8f22-4c555ff17c8a, 9c6759e5-3633-4da1-b017-062597367d8e, 094029da-ca64-477a-ae02-959ec1077252 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: 68aad028-b2cd-4f6f-b782-d05b9776ec14, b1e4db92-3b0b-438b-bc9f-357ba15945aa, 21d3a145-8a28-43df-b450-0af4d5766bcc, 98450965-6315-4eaa-a215-10ac2e8fd340, 1f38176b-fba4-407c-8aea-4b2c5b9b2199 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: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b result, different first party: 1ac06f60-52c2-4e13-9875-e6c15b219fbd, d15a82df-02f5-4447-a9e4-dea62f3419f9, 73f36228-1315-422e-8a5f-b863e61936ae, 446dfcb7-9a59-4eec-aa5c-a43573c990f6, 2f099092-cef1-4f49-bf2d-089ed93c676b 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: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 result, different first party: 9222a867-a8fd-40d0-ad15-f63c3d0a18b3, dae993db-052f-4762-90ee-82dc91541e92, ed3ba282-46f8-45b5-ac00-47e50c90b957, 1f7b4d3f-8bee-4a5a-aad4-36be00108384, 11597dad-12e4-4c3a-b1a1-33d1f4b97cc6 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: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d result, different first party: 1a8412e9-355d-4a18-85aa-be03500c73c2, ec40935c-45e0-4f21-9348-bd0758ff2b64, 806a55c1-4533-4f35-9151-841d36932add, 9c79f47a-dd26-4bef-b5b6-f5744bd11881, e61418f3-d1b2-433f-b51b-e8b1cbed708d 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,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,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
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,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,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
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,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,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
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,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: 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,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
Upgradable scriptChecks to see if the browser attempts to upgrade an insecure address for an script to HTTPS whenever possible.
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true,true result: blocked,blocked,blocked,blocked,blocked
  passed: true,true,true,true 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,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
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,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
IP address leakIP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address.
  passed: true,false,false,false,true
  passed: false,false,false,false,false
  passed: true,true,true,true
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,false,false
  passed: false,false,false,true,true
  passed: false,false,true,false,false
  passed: false,false,false,false,false
  passed: false,false,true,false,false
  passed: false,true,false,false,false
  passed: false,false,false,true,false
  passed: true,true,true,true,true
  passed: false,false,false,false,true
  passed: false,false,false,false,false
Stream isolationBrowsers that use Tor can use a different Tor circuit per top-level website.
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
  write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: false,false,false,false readSameFirstParty: 185.31.175.191,195.206.105.217,185.220.101.1,151.80.148.159 readDifferentFirstParty: 185.31.175.191,195.206.105.217,185.220.101.1,151.80.148.159 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,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
  write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: false,false,false,false,true readSameFirstParty: 2a0b:f4c2:2::50,2a0b:f4c0:16c:8::1,2a0b:f4c0:16c:5::1,2a0b:f4c0:16c:5::1,2a0b:f4c0:16c:11::1 readDifferentFirstParty: 2605:6400:30:f1b2:d871:dd63:1751:ce8a,2a0b:f4c0:16c:13::1,205.185.122.149,2a02:169:55f5:2::2,2605:6400:30:ef8f:38f7:9bf8:5788:11c4 passed: 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,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
Tor enabledThe Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default.
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: true,true,true,true passed: true,true,true,true
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: true,true,true,true,true passed: true,true,true,true,true
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
Fingerprinting resistance testsFingerprinting is a technique trackers use to uniquely identify you as you browse the web. A fingerprinting script will measure several characteristics of your browser and, combining this data, will build a fingerprint that may uniquely identify you among web users. Browsers can introduce countermeasures, such as minimizing the distinguishing information disclosed by certain web APIs so your browser is harder to pick out from the crowd (so-called 'fingerprinting resistance').
Media query screen heightHeight of the user's screen in pixels.
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1340,1340,1340,1340,1340 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1340,1340,1340,1340,1340 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1340,1340,1340,1340 passed: 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: 900,900,900,900,900 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 900,900,900,900,900 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 860,860,860,860,860 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 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: 1440,1440,1440,1440,1440 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
Media query screen widthWidth of the user's screen in pixels.
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1280,1280,1280,1280 passed: false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1607,1607,1607,1607,1607 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1607,1607,1607,1607,1607 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 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: 2560,2560,2560,2560,2560 desired value: 1405,1405,1405,1405,1405 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1405,1405,1405,1405,1405 passed: false,false,false,false,false
outerHeightHeight of the browser window in pixels, including browser chrome.
  expression: outerHeight desired expression: innerHeight actual value: 1415,1415,1415,1415,1415 desired value: 1340,1340,1340,1340,1340 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1415,1415,1415,1415,1415 desired value: 1340,1340,1340,1340,1340 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1415,1415,1415,1415 desired value: 1340,1340,1340,1340 passed: 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: 979,979,979,979,979 desired value: 900,900,900,900,900 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 979,979,979,979,979 desired value: 900,900,900,900,900 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1068,1068,1068,1068,1068 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1068,1068,1068,1068,1068 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1061,1061,1061,1061,1061 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1061,1061,1061,1061,1061 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 940,940,940,940,940 desired value: 860,860,860,860,860 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 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: 1371,1371,1371,1371,1371 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1371,1371,1371,1371,1371 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
screen.heightHeight of the user's screen, in pixels.
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1340,1340,1340,1340,1340 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1340,1340,1340,1340,1340 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440 desired value: 1340,1340,1340,1340 passed: 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: 900,900,900,900,900 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 900,900,900,900,900 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 983,983,983,983,983 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 987,987,987,987,987 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 860,860,860,860,860 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 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: 1440,1440,1440,1440,1440 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1278,1278,1278,1278,1278 passed: false,false,false,false,false
screen.widthWidth of the user's screen, in pixels.
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560 desired value: 1280,1280,1280,1280 passed: false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1607,1607,1607,1607,1607 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1607,1607,1607,1607,1607 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1280,1280,1280,1280,1280 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 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: 2560,2560,2560,2560,2560 desired value: 1405,1405,1405,1405,1405 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1405,1405,1405,1405,1405 passed: false,false,false,false,false
screenXPosition, in pixels, of the left edge of the browser window on screen.
  expression: screenX desired expression: 0 actual value: 2560,2560,2560,2560,2560 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2560,2560,2560,2560,2560 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2560,2560,2560,2560 desired value: 0,0,0,0 passed: 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: 2751,2751,2751,2751,2751 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2751,2751,2751,2751,2751 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 4,4,4,4,4 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 4,4,4,4,4 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 320,320,320,320,320 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: 0,2560,2589,2560,2560 desired value: 0,0,0,0,0 passed: true,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2589,2589,2589,2589,2589 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: 66,66,66,66,66 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 66,66,66,66,66 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: 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: 94,94,94,94,94 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 94,94,94,94,94 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: 202,202,202,202,202 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: 137,137,166,137,137 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 166,166,166,166,166 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: 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
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,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: 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,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,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,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
__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,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,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
__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,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,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
__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,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,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
_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,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,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
_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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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
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,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,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