Desktop Browsers
(click anywhere for more info)


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
95.0

firefox
95.0

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, 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
  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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f result, different first party: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 result, different first party: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 result, different first party: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 result, different first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 result, different first party: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 result, different first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 result, different first party: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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=${secret}`); let result = await response.json(); let blobUrl = decodeURIComponent(result.blobUrl); let blobResponse = await fetch(blobUrl); return blobResponse.text(); } result, same first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { try { let blobURL = URL.createObjectURL(new Blob([secret])); fetch(`${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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 result, different first party: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 result, different first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 result, different first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 result, different first party: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0 result, different first party: 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0, 3d92171a-6da1-4a33-9bdb-809c4d17e5e0 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=${key}`]); } catch (e) { throw new Error("Unsupported"); } } read: async () => { let cache = await caches.open("supercookies"); let cacheKeys = await cache.keys(); let url = cacheKeys[0].url; return (new URL(url)).searchParams.get("key"); } result, same first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 result, different first party: Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent., Error: An attempt was made to break through the security policy of the user agent. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { try { let cache = await caches.open("supercookies"); cache.addAll([`test.css?key=${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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (secret) => { let expiry = new Date(); expiry.setFullYear(expiry.getFullYear() + 1); document.cookie = `secret=${secret}; SameSite=None; Secure`; } read: () => document.cookie ? document.cookie.match(/secret=(\S+)/)[1] : null result, same first party: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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_6892041189503273, fake_9875645402179374, fake_2583770733061981, fake_03689722373772586, fake_18809734452950755 result, different first party: fake_5032371037120356, fake_22501030497791374, fake_4579618648868762, fake_3831212738322558, fake_3926158563048956 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_6599989472457519, fake_7121021363347029, fake_8914682081141028, fake_012525557017711408, fake_6037585441062048 result, different first party: fake_5706419111986514, fake_07803071343155654, fake_8885106943880574, fake_8583580579103394, fake_45242610346446144 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_9015393142161732, fake_9579413069618659, fake_735033262852022, fake_2041599465502284, fake_3382680425373259 result, different first party: fake_9836484804127188, fake_34062846519478795, fake_735033262852022, fake_5552489233924285, fake_5133205322640824 unsupported: false, false, false, false, false passed: true, true, false, 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_6180310933897857, fake_6011568922133461, fake_9573895175603739, fake_680592704795425, fake_38131984688199627 result, different first party: fake_6180310933897857, fake_6011568922133461, fake_9573895175603739, fake_680592704795425, fake_38131984688199627 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_824738639837246, fake_46579801274802546, fake_37272695021507607, fake_4861257886283312, fake_41534778247716586 result, different first party: fake_824738639837246, fake_46579801274802546, fake_37272695021507607, fake_4861257886283312, fake_41534778247716586 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_7937005611654839, fake_40303504961737513, fake_7987437465846774, fake_5823764104606803, fake_43057661097292654 result, different first party: fake_7937005611654839, fake_40303504961737513, fake_7987437465846774, fake_5823764104606803, fake_43057661097292654 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_24198375275804396, fake_5063911444229532, fake_8185524255479686, fake_6618465198613168, fake_593864706103121 result, different first party: fake_24198375275804396, fake_5063911444229532, fake_8185524255479686, fake_6618465198613168, fake_593864706103121 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_5545300959123904, fake_8849078432134068, fake_03706176495240676, fake_9595749523927581, fake_19673489705159541 result, different first party: fake_43844383703054546, fake_31112290537941023, fake_874606941100466, fake_8493640744019859, fake_580515890234393 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_3402867257811333, fake_34313288529485386, fake_31154235884666104, fake_5028471685465676, fake_7881765477629916 result, different first party: fake_9333547577068029, fake_14240495608852388, fake_09804915652922586, fake_9091234252898979, fake_3098189200962207 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_014766901849726732, fake_15435451864366057, fake_2508522050521289, fake_2751768030304107, fake_9111554718986017 result, different first party: fake_7335427890920523, fake_15435451864366057, fake_2508522050521289, fake_2751768030304107, fake_9111554718986017 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_3370388955982446, fake_06537329311587903, fake_18937775613607255, fake_6029772284439923, fake_6598506979071175 result, different first party: fake_3514070241625298, fake_9875881175906935, fake_39404880327886205, fake_36153902644551184, fake_5488675543153485 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_2992297662372059, fake_47436847630702594, fake_950702826106324, fake_7796260980350724, fake_2982668277022609 result, different first party: fake_40759973915502345, fake_7602247803500826, fake_5769946127046202, fake_5679090438498176, fake_31525413294085114 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_8115806102870249, fake_9455575434446397, fake_376974853911735, fake_7476604997260738, fake_44339095393538663 result, different first party: fake_5444969250485943, fake_20249722426623395, fake_5131700899086162, fake_5100474466972251, fake_5803612166533054 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_07538212129367383, fake_9228467025577738, fake_2676811913255088, fake_510011282948776, fake_15924271211245844 result, different first party: fake_31573123850331974, fake_10366541038162391, fake_5308446975830126, fake_7131597091624151, fake_038599754639208506 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_5580757201464559, fake_3568391254582448, fake_384739767537849, fake_2012734527152369, fake_10465422064866603 result, different first party: fake_3231839915134731, fake_3568391254582448, fake_384739767537849, fake_2012734527152369, fake_10465422064866603 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_05062486425753243, fake_0754321937795912, fake_6737733215499806, fake_6434121017609968, fake_7655433231109223 result, different first party: fake_9573670648406414, fake_9718034590711722, fake_40357895943665656, fake_7899576960573029, fake_973095178640559 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
favicon cacheA favicon is an icon that represents a website, typically shown in browser tab and bookmarks menu. If the favicon cache is not partitioned, it can be used to track users across websites.
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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, 1, 1, 1, 1 result, different first party: 1, 1, 1, 1, 1 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => key read: async (key) => { // Wait for the favicon to load (defined in supercookies.html) await sleepMs(500); let response = await fetch( testURI("ctr", "favicon", key), {"cache": "reload"}); let count = (await response.text()).trim(); if (count === "0") { throw new Error("No requests received"); } return count; } result, same first party: 2, 2, 2, 2, 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, 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: 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, 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: 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 result, different first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 result, different first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 result, different first party: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h1.arthuredelstein.net:8901/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h1.arthuredelstein.net:8901/?mode=write&secret=${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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 result, different first party: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 result, different first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 result, different first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 result, different first party: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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=${secret}`, {cache: "no-store"}); } read: async () => { let response = await fetch(`https://h2.arthuredelstein.net:8902/?mode=read`, {cache: "no-store"}); return await response.text(); } result, same first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (secret) => { await fetch(`https://h2.arthuredelstein.net:8902/?mode=write&secret=${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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 result, different first party: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: e172f4e59a9333fd6b977b9072eadbc4, 14b61aef676c3f9b85ccec26f093dd04, e95a487238550879e2f68ac5f2b6195d, fd8673b7f4122506c0572a322500e8e2, 60920d3848d10bfd411b121eec987ffc result, different first party: 354d5f010cd0d1881b586ca69096c54d, 68c20dea1938dd752a7e041c0acaefc0, b718758f092322a90ea904e160307a7d, 756c17ac8e423e0327e3dd7a494c8860, a58406bfc222061034b90a5e18f0f99b 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: 1bdbfd9418468b4ba57042e2e9bfd5e3, 992c27bd2c239c83a34974c83f007f6a, 8359120b1585a7e07b3e8e38623fec96, 0207077c3028370088eaa6d568967003, fb924a71e88479db4f22f070d00254a7 result, different first party: dab53ccef89fed16452d691c85e3ba69, 0fa1a793b0a4d909d35339e5106a0f1f, 43ab69edc5f756059ad43915aadc1d7f, e17ffb128126db6fb4b2176f0f3f4598, 4738788711f86c0bd716884bcde5d02d 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, 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: 46ed3c188c74e63119720aa802621a5f, 3596db56f904d0d35ccd0c7245d43f0a, 2892e3645c986a267dfdd122673e1037, 392f24cbee3738a62043656ecfc33b33, 88eb5fcf825f549eee5027f0b53fc3de result, different first party: 46ed3c188c74e63119720aa802621a5f, 3596db56f904d0d35ccd0c7245d43f0a, 2892e3645c986a267dfdd122673e1037, 392f24cbee3738a62043656ecfc33b33, 88eb5fcf825f549eee5027f0b53fc3de 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: 4d8e68d94806dd300b4bdd72dda80454, 894749a7b39cc1769ee7db8f903589c0, 9d2e073a50b4e716ce528dbcac709aef, 8fdba24115e4c817db8dcd93947a3808, 77368666be8320019d26d9f64f468d81 result, different first party: 4d8e68d94806dd300b4bdd72dda80454, 894749a7b39cc1769ee7db8f903589c0, 9d2e073a50b4e716ce528dbcac709aef, 8fdba24115e4c817db8dcd93947a3808, 77368666be8320019d26d9f64f468d81 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: 8bc6def06e80105e8a626f7a490650eb, 95715d5a6542b2720dd2a8bfcb126bdd, 915af2f990d9317fb689ac49e9ee90a3, 7a32c812b231813a395eaf3a2c896b2b, 1717a97001871a20b38bc4c0b1de585e result, different first party: 8bc6def06e80105e8a626f7a490650eb, 95715d5a6542b2720dd2a8bfcb126bdd, 915af2f990d9317fb689ac49e9ee90a3, 7a32c812b231813a395eaf3a2c896b2b, 1717a97001871a20b38bc4c0b1de585e 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: 2848ac4eaf32e8917d34cf4c7042bd62, a9c32ca7f4a2876f4f5abbb44c8fc4e1, 10ea9c8229c0e11517f3fc3c5746f806, 7c32f1907eb083d9f9a9e16641fd3c99, 638ecd167fc9f338322a7cdb52de422c result, different first party: 2848ac4eaf32e8917d34cf4c7042bd62, a9c32ca7f4a2876f4f5abbb44c8fc4e1, 10ea9c8229c0e11517f3fc3c5746f806, 7c32f1907eb083d9f9a9e16641fd3c99, 638ecd167fc9f338322a7cdb52de422c 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: 1a522e7ace7a464b28f792f518845205, f4cf11cacd3757a953e46673ad04cab1, 4d76ef0976b3f44b93fac30c845ca588, 2a93f7a444153394edff18939315a336, a3f7e43e62268511ccc3fb6471e2a87d result, different first party: 5bde9b20b93870237763f8010aaf7b0d, a42373d194edd414b3054b9d0cd9ded6, 959e994a0ea6a59e652331783ddcda2e, cc454ad7fbc699042b5f0db7d2259dda, e3158f3c6bb63cf5e920020703b4bc06 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: cbb94ea3a3fcc7d3580fda726f66ee63, 7cdacbcccfc0abd9d3e44f9d2d2b02de, 93326b0ec2cdd574d984a65ff8aecda3, 2df390c6474b347d8e965cd748c772af, 3ea17071223db04efed01efa36548688 result, different first party: , , , cf68fd2b81058222adb2cc4948e8759b, 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: 8dacdb7c844c174624b165831ba3ec52, b467652c6f908ea09fef4d44eff44ffe, a7f5b5ae2e40cf3480849ac9117de67c, 7df39b0dac8dc827cdcb31169d4c78fb, 48bfcdde8a70bb84f66ec744bab1932e result, different first party: 8dacdb7c844c174624b165831ba3ec52, b467652c6f908ea09fef4d44eff44ffe, a7f5b5ae2e40cf3480849ac9117de67c, 7df39b0dac8dc827cdcb31169d4c78fb, 48bfcdde8a70bb84f66ec744bab1932e 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: 5b4fb99cca234ffae1c3bbdf39568761, 3a7ae4301efc86e5f4f0e2863603936f, 9a79b225750bbcce4fb616a38411cf4b, 68c62f44e502e4f31c8ac5f497b5e465, 9a3938f14849eee11b969467aed6ddde result, different first party: 5b4fb99cca234ffae1c3bbdf39568761, 3a7ae4301efc86e5f4f0e2863603936f, 9a79b225750bbcce4fb616a38411cf4b, 68c62f44e502e4f31c8ac5f497b5e465, 9a3938f14849eee11b969467aed6ddde 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: 0131c8fee2870109bd7b6ea89adf872d, b12f0041b9ed5537add23a18ab523f99, 5c02198baad762e640a27bd9eae862e8, f857d2d500f956403a03fe67a4641695, 7be1302d39e0de0d412fdf32af09a04c result, different first party: 0131c8fee2870109bd7b6ea89adf872d, b12f0041b9ed5537add23a18ab523f99, 5c02198baad762e640a27bd9eae862e8, f857d2d500f956403a03fe67a4641695, 7be1302d39e0de0d412fdf32af09a04c 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: f89a225483a39342d4fe5699439fba7d, 4ca2d6e1ec8edb8d371e1da18f0fee5c, 10dafd7a176f3abebf1aeb7c9a8179fc, 33adb4a88a8a2fd5498690fb00be1c51, 8cc12d74d0c5ee0a6d93da4022044049 result, different first party: f89a225483a39342d4fe5699439fba7d, 4ca2d6e1ec8edb8d371e1da18f0fee5c, 10dafd7a176f3abebf1aeb7c9a8179fc, 33adb4a88a8a2fd5498690fb00be1c51, 8cc12d74d0c5ee0a6d93da4022044049 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, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded result, different first party: image load succeeded, image load succeeded, image load succeeded, image load succeeded, image load succeeded unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: () => { let image = document.getElementById("hsts-image"); image.src = "https://hsts.arthuredelstein.net/set_hsts.png"; } read: () => new Promise((resolve, reject) => { let image = document.getElementById("hsts-image"); image.onload = () => resolve("image load succeeded"); image.onerror = () => reject(new Error("image load failed")); image.src = "http://hsts.arthuredelstein.net/test_hsts.png"; }) result, same first party: 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, 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: 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, 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: 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, 2 result, different first party: 2, 2, 2, 2, 3 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: (key) => new Promise((resolve, reject) => { let img = document.createElement("img"); document.body.appendChild(img); img.addEventListener("load", () => resolve(key), {once: true}); img.src = testURI("resource", "image", key); }) read: async (key) => { let img = document.createElement("img"); document.body.appendChild(img); let imgLoadPromise = new Promise((resolve, reject) => { img.addEventListener("load", resolve, {once: true}); }); img.src = testURI("resource", "image", key); await imgLoadPromise; let response = await fetch( testURI("ctr", "image", key), {"cache": "reload"}); return (await response.text()).trim(); } result, same first party: 1, 1, 1, 1, 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 result, different first party: Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context., Error: Failed to execute 'query' on 'LockManager': Access to the Locks API is denied in this context. unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
prefetch cacheA suggests to browsers they should fetch a resource ahead of time and cache it. But if browsers don't partition this cache, it can be used to track users across websites.
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 2, 2, 2, 2, 2 unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 1, 2, 1, 1, 1 unsupported: false, false, false, false, false passed: false, true, 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: 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, 1 unsupported: false, false, false, false, false passed: true, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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, 1, 1 unsupported: false, false, false, false, false passed: true, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); return key; } read: async (key) => { let link = document.createElement("link"); link.rel = "prefetch"; link.href = testURI("resource", "prefetch", key); document.getElementsByTagName("head")[0].appendChild(link); await sleepMs(500); let response = await fetch( testURI("ctr", "prefetch", key), {"cache": "reload"}); let countString = (await response.text()).trim(); if (parseInt(countString) === 0) { throw new Error("No requests received"); } return countString; } result, same first party: 1, 1, 1, 1, 1 result, different first party: 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 0796f6ad-b96d-46c9-8be7-e1eb424f3bc4, 4f953163-7750-424b-82d6-dc43ad50d65d, 807d593a-049f-4243-9407-73e34b061d05, 943be038-3102-4de3-803a-15ad12cba53f, 4ec0f91c-c4f6-4001-83cb-7aefb88d84b9 result, different first party: , , , , unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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=${key}`); } read: async () => { let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); let response = await fetch("serviceworker-read"); return await response.text(); } result, same first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
  write: async (key) => { if (!navigator.serviceWorker) { throw new Error("Unsupported"); } let registration = await navigator.serviceWorker.register( 'serviceWorker.js'); console.log(registration); await navigator.serviceWorker.ready; console.log("service worker ready"); await sleepMs(100); await fetch(`serviceworker-write?secret=${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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: 6bb833e7a0e1dfacab3b0405518f3bdc0acf743d94a586026b745197bfdbf796, f042b196510a8a58435f9923db8065fc91e97011d0119722d2e4f7b84631da55, 8974bd67fc884098395739649c7285e9a7abd1cb48d8aafffaa774d8dc10f005, 6337250396935c366d150caacabad87fcc388c576c2793b3146ce48b0ca71873, 189a6fb073f42401a19695c7a89e685b9f0e547e7c9154d1ef83f674a111185f result, different first party: 0430a9bf269ff81daf737f6266351199d7abd738baf5606fdbb921f302f4f122, 0430227c9afb0a014a041a45a5d1335f0084522c0888d237a2176f984619fe05, 04304d0c90b33e9e928fa273e39e262c2581b590654fe0d46862e577d236df53, 04308b9d44d97b8d63dc35a88de964cf7839a33c8ac21e8d9d7ba9da58b12da2, 0430de37c1886c9a5270f6ade5d53e70c4304b4309c9dce2c6c20e87349c5196 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: 12f93544af68be9c933614fc4da5a53a58890d4fe95620ce1b26736e83ebbf78, 02163110d8fdedfb16fb7b4447cb9b585b1b4840e8cc6a2eb9fd6828ffeb8afc, 974bf62b30234ab801e5913cda349266ada5e1cdcea4f8f714c040fd246f8a2a, 27a0c872c3cc67f4eb9ea9bb58274fe964dcad7cdca002d39e641f9f7180a40e, febcc8adbcc3daba8208362ba33198ecb3a32bc2472d1a9378a0bc004cf9185d result, different first party: 04300ac97e3a84690116118675b23d9b10aaa3c852e53580d5c41eec75c480aa, 04302f89c29b8fa53f478a773d9084262ccb5700b854ffc0b928e4afbc787045, 0430b5d6a05c1eda977928e9474cab7251be87a54926438b6edc8012913d9924, 0430e324efd3716bcaef467c62ed66ee644515aed1092c72705f447c88d1b05f, 0430895363f22c260fe1df0c38bb67165581c7009e97d8ab8bc7179aa5e8681e 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: 2117d1d2e2bf58f516eb4986eeca5e96a6e2c5f2ce26e35f904ebcb8fd01a561, 39444cf114f5aa4b889e974884617de2542d2384d1323d86bd46423490b6e2a4, ff6edf35e9226a805dfb873b5fecc03b20a30697cf84d435ac728fdf860008d4, d57471b285ba9259d6d6bfdd5a352b5dc847f24b5cecb5a43d773bf92bf0dc02, b4cd8a8798e9e2aa2476d5971c220b6b67e13945fb81216404702dd2ca435162 result, different first party: 0430f5c2f0c5fd166cca858aa78f834b01646f999230e9fee22fd08ecbbf3024, 04302cf95b5a8391b30d3f52d18ae13773d0a6364641dee732c449fc517a7357, 04307f8d259a59e02e20e8a504847f5e4eda11cdf1fc786c569dcb695cf350cd, 0430cebecf2d12c99f832343f958a84383e60955df80834045604739495c1082, 0430c5ac98c6a99d04d78b5f93c5d1c14e4a134af1a781e4772c1a246b2d7ea1 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: 7af41cde27b2d473ae1903ce2ea2f1fd6269cf18e22f62291b9d8c6acdfe5bcb, 0d1f128ea330d78f79708b71d7911fef99ac11d28e2e34813c59d518945f4209, a97dcc2af9b3b5afe95a5274e7267d58b3ca39e6e48df1df91c8f80236754ac4, 29b0bab2177468bca5f7a46451b826d22d0779d2b90a35b9bf9fbecd40542148, c8e844aedf628d6389d50e2656b04eed86e55073165c708a0f79d5d81c8bdc6e result, different first party: d772f035feb0ee858d4cee0c6bdc78fc58e2249598c0fd8975964e3a8b5b8adc, 12d7ec99744ebb35157b57a764bb998db48b1693db42cba7bed6b1f62ec909e6, 2a94291251107d080b94eba4adf966e152a6e99e85fbb07782f408935c539681, c247e890aac2f3c293b6213f880200c76c521348f5d39b50ea7aa9f8e419b25b, 42d6d7e6d575705e36b625e6882edb15252505bdfa12cfc5e385c77b47b86343 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: f5dc3cc3c7945b5cac1da45fcc49bfa9356fc8c1606c08bc8e37fc5207063faf, 90208d7e564dcf6d3a8189694600a0e33ed1e09b18c11c2c1cfc2c67d3142620, 463469dd939093a9147478818b864b20b4300e24d965787bc834a70980eb8d77, 22ab9059f443ca7880bcadbd2e88e66e58cb787b5018b19a16eafb118aa5814d, 5c40a174a433450134d56294af5e9a0058dd69004aa2ae02772ff96b10227ffc result, different first party: b7770090fea3716ddea9732054dfa77e1aa50763d9829b0f58e36dc289fa3296, f993fed1319930e4c1d8b9199927516170b281421f604211038c951bb4f0807d, 7de60c14f1209f4772d7bfd25a33b1b54608487b6b6b3c7c89968c9aa3002b89, 9134cf9d920089f4bfcdd3fe12f704ce0a7e1311d06e627dda088e2774804cff, e06da96d2d961681ed826fafc04a429d569cad13c0b3c4a67ad5f107aae737a0 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: 0f0baf691ba52b3ee2b5936b487274785a5a801c5557eafe96f461531c10fb7d, fa444ef245d1a4cb934612a34fe52fcd9c5b3fb8e227aaefbb84ec16e0dee62a, f3ed275fee4f85fdbd8217fef7a7b6858638f42f37b451e122450aa27a5f4a3d, 7ae77da645eee2c2cb12a9dd33bdc852dd9c6db1cc81cea89f91e82842c41e3d, 53bcfc8c3c02ce8e023f71adb967ad3b6506e67a473ae93e951c8ba811f07b2d result, different first party: 5746965d7be22d7e289c497354de974221476c1179bfd0c372c365ad5e9a2222, 75b25cd25636ed39829e686957f040aa6f6d6fe1aec16d3b4ecd469bff736f3c, 9a78ee99cef15b47d1594e4c52e4bdd0757393a09218b3dd8f29210b70200456, 6a354874ca58bfbe7c2af2a27ed706ba5a07e2be40917a69695d8354ab218be9, 9af6844e4e8722d144276ab87cdf8f4c5b8eb0671efa2163d685378caa5c177d 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: e03450f95e7c27b79f4f424e0a47fb9c5cdbe2238083efb1e739180d4a855040, 4cc9d2009375b4a8407ce07bfdfc47905cee36ee5f5b1052eade9d65ca44533c, 65f91065618693a7d0430c76abbc9f3293b974c11aa95401a3df23ec96f90268, 3c821e6080568f2e521caeceb7345cdfa2bf6a4ffdffc5186e2534001048c882, 3df5814602c112e75aecb8f8341fa56b4c91fa3695c7de4fc92584ce9191187f result, different first party: bdd9eabd3d4024edc3daa351354251dbd0edf4b64fd3f8855b76e3b83e05c862, a9157c69bd4c1de23c079dc29a43501f3a9818b0fc528e463514bf4393838f23, a3cc248919800f978cab28bbdc203560172cb30e6d7830c2a841ceb7c130a49c, 99139fbbf84322c8b1111c7426ed6ec7da283bfa0ad496173bd851d23ec30378, dedd0c2de5a0dacf7821bf559c0407d6772ec996c5ba496c8416aff4575aea31 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: 5824985dff7f3276be3091a4b73ff7f1253fb1183158bc9346f8ac0147bb997d, addad3498d9f2c2ea8235a732b4373f73aea8570ea1a4898bf8b94fbe765e2bb, 35e4d769a173504f70a1a89fb7be8ea17cae7678c1fab81a69168bf0dfccf9b3, 5bba6379aaa7b6e7392f408ed5b768e96bdf85c5e368c090f4f7c288d70526fa, 71feb4f1c6d7f9d18796a6c4883332f1d5dae3f8f0b4e63fa2c3d48ffe3efdec result, different first party: 043015ce560a016f2e8a47aacec14083399a05afe4413b52f9693bbcff6cbb33, 04307e1fd405c464f052802396e33e403cd620c3b9e8324b03a7216fa7ad5ae2, 04304457d03d07a9790a1be4152cc1f8b2da1746f2111c35d3a1d617f9f54b35, 0430d3539558f478bc42471b3a689ca86a66d38a66b95119d0040035145c5f01, 0430dacf61ca593227d7ca5236cda6bd6cf756007395173e646da4d4653f8af2 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: 894af735611e00f863df52e38ce56c880b19a0768f082564f8e6feb9dc1cfdee, d9e0bc9baf38e1973a4e01e3416ddd22ac7ea5d732266f8923c857e3bf7ae6b7, d20aec1adfc7827abb7f78473b806685b4751ef80c9a236fb7323e90999ab60c, 09e647bdf6ff5f68e5bf24bce6c025360cb6c5cd31399978bb3c92ec2d08d982, efe6d070c7a6f6d2d2838c48e49466fc8e6f88c62043654ab3096dabc5eed05e result, different first party: 574f6e3ae409f7e9dd74f74c7d96b35ed73fc0a010b25810b70d104c1723764f, 6c1f249adb13947a7845e04974f01947f79079f72ba68a3948b6c9fe7315fe7b, bb5b4dfced8f38b5c00faefc1cc297bc67ffff04a0dbb553c44cb09b8f16e466, 7d973540b466e5dd7ebf70497224067747878aae4d841970621fe6b1afc42c7e, c465530c712d3ef33c214e6bba6c743de6e6f6a5db4d48da1448a53f2b498781 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: bedf090f7f14f5c8da72011321aa594ac95af2f25352d6963134b05c6c7a0b82, f60a0f0a72cf5bff06207b4b21fb27a2d495e9cfe151aac68f7e6b0ece4683e0, 649b781a3ced8842716242a1fd1a1b9e16813656d9c98d184b021690b0833ed7, 5a8510053469c9a22fb9ce9c7d6723e12ad024979c40924706a4691ae9acd0ab, 979333dc25a52c8a90a66d3031adad62f71a0e4e664f192b5436c3b21bd90303 result, different first party: b648b3afec212b5ac25e7748c0b957a53bc39f44a0ab44189c172c607c74c74c, 1202d685f60e60b588d85010185a003ea96b36fdb38d654bf5d2cd33825e4849, ad8ffd699ee432328de2f99e995c8ee0e7a04a016cfeebb81caecee47c5c219e, 0ff07c5fe10e0f1c19b721db685bc61c89c1ebaa9db1d6ecf11c9ed287ec07c0, bf3b3bec18a203e0cd2d584b43b5f09e401166b5088a4bd69e4b0b521de53c0f 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: cd2ba1e060abc4dca641b34a0deafba3b2b5597e2bcb1961a492f585d81b8435, aa7d391d853ccb43198c882a26a5d881aa097cf712e1b7024e740d6addc18fd1, 26ce11d4ae77fdc3f908b2e58b96ef88e3b74c2b1bc4df62c07c16f5d0652dfd, 351f8ff1acc15674e7b59aa4d039f159e1304383b999b647c7d0f049c4e9cec7, b19a1161c30b945dfb7a9986dabdff241be71d44daf50ac1af6b23acab10f262 result, different first party: 6ef066e9719fd7d6f1a083f9efd546c85ad6af583f17324a46ee3d58c742f527, cea207b6b82e0704d45da493b03fecd2df3d1c3ae4bb4b814926e31e1032c030, 84e9fdabc15344f16e78d5aa4b968979ec77b0655cb3878c4ee26021032602d8, b9f9f796243af5dbcb8315eb5462f780138a45da6ae22cebe133e8934a687f51, b6165a86cc17a9e978832e84372cd6b512c65c4242b90c08acaa79af194bddb0 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: 807b628d19877b48282e93a84af57cce615548d36be0ab3d0052468a89556d3f, b3de4f65fc655d619d0d074564f36b54e87f3370dc268e1b052b85edbc65c9e7, 399879961ad0ebaf9b2a1c0ee4e44ed48f3e6fb22f03cc05ea8dc9f2067fe8c0, 65642010c13f83909dfe4803a0db87363d73679f86b81e2d05c2d85d0ceb555e, 17421cb989f4d856d54e7a6596d14f510fd2c09ddf54f8517975ac98c0edead3 result, different first party: b415c209e83b601d956eb1d66a886e27403c5794d23acd0f52b55f2e351d9d3b, b724d7072f273cca60e2022ad12ba8ab68d5d2f171167016c4b08bd590bdea85, 085ac235aeaca2ac69fd620a867e357f02d5fb2d0d6a171cc961698186d2ea57, f723cd1372d64137689da294f3c1bff871ce8007bb2f16fb955a7a29a357f3a5, c258ae666d49e22650aa85a6d722f4ed7268cc4ccafb8a26d3451c9d573e4014 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: e5eef77f6468a2b6b4f558500e94b930f7062dd6d466ba358c4680464fad3c6c, 25b8935a6385223a5ab53559417e7e4fe833e4afe2eaae5a065373dc61249027, d677744a135f11490fe56dc7ebbb5125bfff145aa1e908f7d9ab7971d1ffe998, d8df8d4f05b96034962704c47ca01fe3799c2efa846d8e10201289a04f2fcb1c, 87a2178369db6dc1e30be1ab8eee64b49e646d1ffb134c214355fc7ff4c45486 result, different first party: c0758d0dd4c54a95e01f8c1f2ff2444ca8bbb5c62c6d948b500ae9327e317731, 121bbb60ca8afa037ed201637fb1d0bc8398720406370925a9bcb4964b803b3a, 8fced590e142e91703d336522c928d7a9a4e6632a52f49147bbb4fdaeb735edf, d2d550baa8d1b3ba9b8a86b9fd347152d6c9e7c4996622fe18186c8f661a22e3, 7a630f81430a9853fc4713aacb1b68487b4a1e35416998f4a3aa05a28e610c53 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: a9d046e020f1cfd4da70492cfa4ddcd6906470047022f6d27ffe61be4fc4c2ca, b5f0d548649471fd6ae0473b2873030901069f8f8dd070de56dff0b91aee4ca2, 965f8b66685aaf8618d280e64b48cdcdc0c82a21ebd0a0fefb96f41cfb1d140d, 521dabb4a34005ea3dfe6ddf4a994734ba7bcba3f829585f40dc3488925ddbdd, 1912c76ba5b1064e543676b7036513a527faee0a789b69bb946bd80460ea08ad result, different first party: b16477415ae6bfad7f403b48c4ad72b378c418634a3ecf9d1e48d17c062cfa65, 0edf407b5fed7451bd9d52b19a09b3ef26feb302591d6e4bbcc99336a884ee7d, 5c35e71261bbe78578e9c2782831b789ecdafa1d46d1d1a9628798a9d3f5bc4b, 3b4e0a81b6671864d2c8a9d03e3300862a57b55735bdc115a0d39b8b2c43cbd5, c25f580675cf038e7ece920676a2141ae56206564efa0353ca267f9f591783a6 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: d6ad12097cc5a1c241489fa1455444b5ba8b0ceaf3ecc6cae0f478787f23c9a2, c0b41a6181124a31035b0bdf1121603e7c993ab6474755874f3b92b1af00c077, c566076b196c479f6cc88ac75c75a45eddfe2d4db8348fcdfc4cd824ae5170da, a1dc829bf7a1cca9938c8f81980b0268c3ad8b8851e1e599fae3251e13898427, 78a97626801d7503bf9c713140558777267c99c7b665f1599d9eaa7a31d06ded result, different first party: 9f54b214250a19d46e0ed6541a0890b5886f4b9890eec7849d35cc295ffa1fe0, 42b1c4484fe48b202be0f496b2a0c3ab6fe447d9cec5f45aa877235fd6c96b30, 178427c2a93fb97adcb8c97ffa7367506cfed96bd50749129a0f63bd2988f159, 7c4b1eda705338fa34ba803d0f6f8a0181125d64b471b63f132b3d71281c8d98, 012a52fe25c45aecc0ec5be9b55b2817739c75f15eea33ab10616d1d67279090 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: e3e6d433edfc9237982b3535967439797117d6b2a9f7e1f211e297443905db02, 889610ab56207108ba94893aa47179d0de6da36776b4dfb6ad65cffbaa0a7040, 37596c5f787969cc68dddc7f6f0804b8736d62f4f3418414d3ecff1731613da0, c02898e5039d9944be272a83dcc78afd8ea21535fd5993f6e5aefccfa23bdcbe, ad91f4fabc02172df5eb95e9636c47556ba741042632b05bcd36a3de58201016 result, different first party: 8a1b289abeabb8cc588d9bb1776ce52d1fc5a5d0180d7029fd548852054e7d1b, 3526e2eb8d1e17c55c1f461dc50f7511bd3c658fadb469ef2e12f178863e0469, d2306fb42bff8e0fdbb04c114c45d89081c4e29e35061cd806e5a23bc98f05c2, f016cb776c969a52f2d4c51a6e13e1716f6769566268e95d4299aaf549b7ccc8, 18634c8c8a17004fdba1a80503e0502f7542e3310bf6bf7c376c54fe38b169df 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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, 09 Dec 2021 02:31:55 GMT, Thu, 09 Dec 2021 02:32:25 GMT, Thu, 09 Dec 2021 02:32:53 GMT, Thu, 09 Dec 2021 02:33:22 GMT, Thu, 09 Dec 2021 02:33:50 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, 09 Dec 2021 02:34:19 GMT, Thu, 09 Dec 2021 02:34:50 GMT, Thu, 09 Dec 2021 02:35:20 GMT, Thu, 09 Dec 2021 02:35:50 GMT, Thu, 09 Dec 2021 02:36:20 GMT result, different first party: Thu, 09 Dec 2021 02:34:29 GMT, Thu, 09 Dec 2021 02:35:00 GMT, Thu, 09 Dec 2021 02:35:30 GMT, Thu, 09 Dec 2021 02:36:00 GMT, Thu, 09 Dec 2021 02:36:30 GMT unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false
  write: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( {"secret": xhr.getResponseHeader("date")})); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "no-cache"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) read: () => new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.addEventListener("load", () => resolve( xhr.getResponseHeader("date"))); xhr.open("GET", "https://arthuredelstein.net"); xhr.setRequestHeader("Cache-Control", "max-age"); xhr.send(); setTimeout(() => reject({message: "XHR: no response"}), 3000); }) result, same first party: Thu, 09 Dec 2021 02:36:58 GMT, Thu, 09 Dec 2021 02:38:56 GMT, Thu, 09 Dec 2021 02:40:51 GMT, Thu, 09 Dec 2021 02:42:37 GMT, Thu, 09 Dec 2021 02:44:35 GMT result, different first party: Thu, 09 Dec 2021 02:37:43 GMT, Thu, 09 Dec 2021 02:39:44 GMT, Thu, 09 Dec 2021 02:41:34 GMT, Thu, 09 Dec 2021 02:43:25 GMT, Thu, 09 Dec 2021 02:45:22 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, 09 Dec 2021 02:46:27 GMT, Thu, 09 Dec 2021 02:46:52 GMT, Thu, 09 Dec 2021 02:47:16 GMT, Thu, 09 Dec 2021 02:47:40 GMT, Thu, 09 Dec 2021 02:48:04 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, 09 Dec 2021 02:48:28 GMT, Thu, 09 Dec 2021 02:48:54 GMT, Thu, 09 Dec 2021 02:49:20 GMT, Thu, 09 Dec 2021 02:49:45 GMT, Thu, 09 Dec 2021 02:50:10 GMT result, different first party: Thu, 09 Dec 2021 02:48:35 GMT, Thu, 09 Dec 2021 02:49:00 GMT, Thu, 09 Dec 2021 02:49:26 GMT, Thu, 09 Dec 2021 02:49:51 GMT, Thu, 09 Dec 2021 02:50:17 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, 09 Dec 2021 02:50:36 GMT, Thu, 09 Dec 2021 02:51:00 GMT, Thu, 09 Dec 2021 02:51:23 GMT, Thu, 09 Dec 2021 02:51:47 GMT, Thu, 09 Dec 2021 02:52:10 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, 09 Dec 2021 02:52:35 GMT, Thu, 09 Dec 2021 02:53:00 GMT, Thu, 09 Dec 2021 02:53:25 GMT, Thu, 09 Dec 2021 02:53:51 GMT, Thu, 09 Dec 2021 02:54:16 GMT result, different first party: Thu, 09 Dec 2021 02:52:41 GMT, Thu, 09 Dec 2021 02:53:06 GMT, Thu, 09 Dec 2021 02:53:32 GMT, Thu, 09 Dec 2021 02:53:57 GMT, Thu, 09 Dec 2021 02:54:22 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, 09 Dec 2021 02:14:49 GMT, Thu, 09 Dec 2021 02:15:14 GMT, Thu, 09 Dec 2021 02:15:38 GMT, Thu, 09 Dec 2021 02:16:03 GMT, Thu, 09 Dec 2021 02:16:27 GMT result, different first party: Thu, 09 Dec 2021 01:51:52 GMT, Thu, 09 Dec 2021 01:51:52 GMT, Thu, 09 Dec 2021 01:51:52 GMT, Thu, 09 Dec 2021 01:51:52 GMT, Thu, 09 Dec 2021 01:51:52 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, 09 Dec 2021 02:16:52 GMT, Thu, 09 Dec 2021 02:17:21 GMT, Thu, 09 Dec 2021 02:17:50 GMT, Thu, 09 Dec 2021 02:18:19 GMT, Thu, 09 Dec 2021 02:18:48 GMT result, different first party: Thu, 09 Dec 2021 02:17:02 GMT, Thu, 09 Dec 2021 02:17:31 GMT, Thu, 09 Dec 2021 02:18:00 GMT, Thu, 09 Dec 2021 02:18:28 GMT, Thu, 09 Dec 2021 02:18:57 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, 09 Dec 2021 02:54:41 GMT, Thu, 09 Dec 2021 02:55:05 GMT, Thu, 09 Dec 2021 02:55:29 GMT, Thu, 09 Dec 2021 02:55:53 GMT, Thu, 09 Dec 2021 02:56:17 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, 09 Dec 2021 02:56:42 GMT, Thu, 09 Dec 2021 02:57:08 GMT, Thu, 09 Dec 2021 02:57:34 GMT, Thu, 09 Dec 2021 02:58:00 GMT, Thu, 09 Dec 2021 02:58:26 GMT result, different first party: Thu, 09 Dec 2021 02:56:48 GMT, Thu, 09 Dec 2021 02:57:15 GMT, Thu, 09 Dec 2021 02:57:41 GMT, Thu, 09 Dec 2021 02:58:07 GMT, Thu, 09 Dec 2021 02:58:33 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, 09 Dec 2021 02:09:11 GMT, Thu, 09 Dec 2021 02:09:42 GMT, Thu, 09 Dec 2021 02:10:12 GMT, Thu, 09 Dec 2021 02:10:42 GMT, Thu, 09 Dec 2021 02:11:13 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, 09 Dec 2021 02:11:53 GMT, Thu, 09 Dec 2021 02:12:31 GMT, Thu, 09 Dec 2021 02:13:09 GMT, Thu, 09 Dec 2021 02:13:48 GMT, Thu, 09 Dec 2021 02:14:26 GMT result, different first party: Thu, 09 Dec 2021 02:11:56 GMT, Thu, 09 Dec 2021 02:12:35 GMT, Thu, 09 Dec 2021 02:13:13 GMT, Thu, 09 Dec 2021 02:13:51 GMT, Thu, 09 Dec 2021 02:14:29 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, 09 Dec 2021 02:19:44 GMT, Thu, 09 Dec 2021 02:22:15 GMT, Thu, 09 Dec 2021 02:24:50 GMT, Thu, 09 Dec 2021 02:27:26 GMT, Thu, 09 Dec 2021 02:29:49 GMT result, different first party: Thu, 09 Dec 2021 02:20:41 GMT, Thu, 09 Dec 2021 02:23:05 GMT, Thu, 09 Dec 2021 02:25:54 GMT, Thu, 09 Dec 2021 02:28:20 GMT, Thu, 09 Dec 2021 02:30:46 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, 09 Dec 2021 02:59:12 GMT, Thu, 09 Dec 2021 02:59:57 GMT, Thu, 09 Dec 2021 03:00:41 GMT, Thu, 09 Dec 2021 03:01:25 GMT, Thu, 09 Dec 2021 03:02:09 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, 09 Dec 2021 03:02:54 GMT, Thu, 09 Dec 2021 03:03:40 GMT, Thu, 09 Dec 2021 03:04:26 GMT, Thu, 09 Dec 2021 03:05:12 GMT, Thu, 09 Dec 2021 03:05:57 GMT result, different first party: Thu, 09 Dec 2021 03:03:00 GMT, Thu, 09 Dec 2021 03:03:46 GMT, Thu, 09 Dec 2021 03:04:32 GMT, Thu, 09 Dec 2021 03:05:18 GMT, Thu, 09 Dec 2021 03:06:04 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/, 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
  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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 result, different first party: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 result, different first party: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 0796f6ad-b96d-46c9-8be7-e1eb424f3bc4, 4f953163-7750-424b-82d6-dc43ad50d65d, 807d593a-049f-4243-9407-73e34b061d05, 943be038-3102-4de3-803a-15ad12cba53f, 4ec0f91c-c4f6-4001-83cb-7aefb88d84b9 result, different first party: 0796f6ad-b96d-46c9-8be7-e1eb424f3bc4, 4f953163-7750-424b-82d6-dc43ad50d65d, 807d593a-049f-4243-9407-73e34b061d05, 943be038-3102-4de3-803a-15ad12cba53f, 4ec0f91c-c4f6-4001-83cb-7aefb88d84b9 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 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: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f result, different first party: d6671ce9-1ab0-4f10-978a-ac60b552c927, 72c5c169-cd74-48cd-91a5-4f624c224fc8, aa53e085-4ecc-49e9-88bf-e38306881e3a, 7b06e79b-2a6b-44f8-9b1b-ec568a02ea22, 60455f8f-946b-4f83-a0a7-b8737a8db87f 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: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 result, different first party: 07f0eaaa-d723-4c43-99be-430252017dd8, 6511b68f-b7b2-462d-99bb-206707170764, 666b8495-dd7b-41e5-a92c-21d6b8cfc620, 83d056b7-d2c2-49c3-9090-689755f4c588, 7c041637-ec26-41e2-be66-e0aa3bf7f355 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: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 result, different first party: 7206f50b-e15d-4da3-9f60-64f57224f9ab, f3d9fe43-e68e-4b09-88a3-0c76f6a2086a, f20af9d1-89b2-4696-8fca-0317d010a382, 6f2811df-1509-4121-bc57-f67ec613d10e, 155891de-aac8-4385-9886-76749fdca877 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: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 result, different first party: 23a07cbb-f1c8-42e4-8e35-fdb73cf9fe3c, c1a89f1d-53f2-4122-90dd-1b8a7c1380c5, cf9c0f9d-0109-43ee-a8df-2fb8508ccf1f, 60258c99-d912-4a08-b599-1e72a04ba568, 1480db26-6b8f-4f87-bae2-bd6cdc939105 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: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 result, different first party: 103e18e7-f0b5-4ed1-bc9b-503605483b2f, 1068e82a-be92-4cb6-bb06-50e3f236a451, 2fea6288-f175-4134-8dc1-1962349814b6, 921314c0-f2a9-4fcb-b02e-63fdc4a53825, f62b61ca-6e48-4547-a88d-de6c237109a3 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: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f result, different first party: df2c47b5-0b10-476c-a2b6-cf8ba62fce50, 8aef4596-0dd3-47b5-93fb-245d3d522192, 5ab310c5-61a5-4857-9c87-dd7a6cd3af20, 17c6092d-38bc-426f-a40a-18d582b9bd37, 78b4bd76-8198-4310-adcb-fe0cb736472f 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: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d result, different first party: 177ead63-2495-4164-81f5-794bba16c903, 44f373a8-b7da-45cf-8006-351ca6d1bb4b, dd79db1f-f758-4136-b683-d86bc8aef471, 08a469bf-eb86-4b7e-933e-d5d98557a5f5, 9b383711-192a-430e-9705-f86cb0170e1d 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: 742d230c-f2ba-4940-b1b3-1c781ea4a8c8, c4c9bf73-fd1a-4482-95b7-2edde894f3bd, 1a3e2e5b-903b-4ea8-a624-b0fb2955caad, 844b388e-f8ff-4119-b4b9-eb5dabe4e37d, 481401b5-1ca6-433b-a81a-934f4af1cff0 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: 998e6bba-463e-4ff0-b399-c85d317bdb59, 73e4535f-966a-49d8-9c33-51def83f35c9, f315c5f9-fee3-4c28-844f-70d42c74541b, a17733ca-b982-46e4-9113-6412bf2c575e, 258e794e-44f1-4e2b-bae3-311fd4a859e5 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: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 result, different first party: 649cc672-04ee-476c-b43a-d62c9411aa03, 3fe81ec1-b5b6-41a7-9859-6660cc22c123, cb6424db-e42c-4ead-a8aa-a093b9b03b42, 57676a8b-2568-43e6-92cf-3aeb9445e948, 6b002f08-3588-4d4c-ad6d-a36cae172e33 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: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 result, different first party: fafc7a41-8af5-4f19-8529-3475baa2454e, 16b21cf9-e44e-4a1d-8849-c6cead38474a, d2fdd471-7595-4be6-b41a-129f2322888e, 59d3c592-5512-4422-b86c-24aa9413f678, bc9971a8-020f-4a82-9e40-cc24ca55cce2 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: b25f2c1e-89f2-49f8-974b-82c89d7712ee, d8212363-3d2e-4023-b87d-206d1eda7cad, b9fde185-c2a6-466f-ae08-9e0bbe7a8ecd, b1b8a357-022d-46e9-b8d2-19b5b5d1ed40, 0226dc0e-a5b0-4169-bd4a-d3bca614ff71 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: 0796f6ad-b96d-46c9-8be7-e1eb424f3bc4, 4f953163-7750-424b-82d6-dc43ad50d65d, 807d593a-049f-4243-9407-73e34b061d05, 943be038-3102-4de3-803a-15ad12cba53f, 4ec0f91c-c4f6-4001-83cb-7aefb88d84b9 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: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b result, different first party: 2afeb1bc-fda2-463a-8295-2ef6d281021d, 83111a59-0403-4cd2-8838-372c08b76647, 7a55b61f-d606-428e-a795-9de25a6b6ea2, dcb06210-8672-4ec4-96f6-b2f2964db832, 8f85b122-cdd3-4ca8-9f00-820b3113e42b 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: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f result, different first party: 9f5f4a38-0597-4f86-ac88-78f85fdb5e2d, a8e4ba69-3d65-4be1-bc3c-3eaf53b71eaa, 5f087116-69e1-47f7-85c8-38aad6ee7339, 424439c4-32c4-433c-a424-af9abd3024dc, 2d312048-d31d-4e4b-8060-8d0f19e8f38f 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: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 result, different first party: b1a12b14-0b49-40b8-b63f-85800f56551f, 0c2b9c60-b24a-4e08-8a0d-bdb359aea9ee, 7bebb24c-ae62-4b65-a6f3-2b34186cb2c3, 5438a07a-bb60-4262-aed4-1766f2b1b9ea, 1818fcab-6d04-4275-b220-d4181aa4a135 unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false
HTTPS testsHTTPS is the protocol that web browsers use to connect securely to websites. When HTTPS is being used, the connection is encrypted so that third parties on the network cannot read content being sent between the server and your browser. In the past, insecure connections were the default and websites would need to actively request that a browser use HTTPS. Now the status quo is shifting, and browser makers are moving toward a world where HTTPS is the default protocol.
Insecure websiteChecks to see if the browser stops loading an insecure website and warns the user before giving them the option to continue. Known as HTTPS-Only Mode in some browsers.
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: false,false,false,false,false result: Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded,Insecure website loaded
  passed: 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,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,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,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: false,false,false,false,false passed: false,false,false,false,false
  upgraded: true,true,true,true,true passed: true,true,true,true,true
  upgraded: false,false,false,false,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,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: true,true,true,true,true result: upgraded,upgraded,upgraded,upgraded,upgraded
  passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: false,false,false,false,false result: loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely,loaded insecurely
  passed: 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,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
  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,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,true,true,false,false
  passed: true,true,true,true,true
  passed: false,true,false,false,false
  passed: true,false,true,false,true
  passed: false,true,true,false,false
  passed: true,false,true,false,true
  passed: false,true,true,true,false
  passed: false,false,false,false,false
  passed: false,true,true,true,false
  passed: false,false,true,false,false
  passed: false,false,false,false,false
  passed: false,false,false,true,true
  passed: true,true,true,true,true
  passed: false,false,false,false,false
  passed: false,false,true,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,false readSameFirstParty: 107.189.31.102,185.220.100.248,185.220.100.249,107.189.29.105,199.249.230.75 readDifferentFirstParty: 107.189.31.102,185.220.100.248,185.220.100.249,107.189.29.105,199.249.230.75 passed: false,false,false,false,false 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: 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,false,false,false,false readSameFirstParty: 2a0b:f4c0:16c:4::1,2a0b:f4c2:1::1,2a0b:f4c2:1::1,2a0b:f4c0:16c:10::1,2001:41d0:401:3200::3efd readDifferentFirstParty: 2a0b:f4c2:2::41,2a0b:f4c2::25,2a04:52c0:2000:6787::1f60,104.244.73.46,2a0b:f4c2::6 testFailed: false,false,false,false,false passed: ,true,true,true,true
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
write: () => { if (!usingTor) { throw new Error("Unsupported"); } } read: async () => { if (usingTor) { return ipAddress; } else { throw new Error("Unsupported"); } } unsupported: true,true,true,true,true readSameFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported readDifferentFirstParty: Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported,Error: Unsupported testFailed: false,false,false,false,false
Tor enabledThe Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default.
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: false,false,false,false,false passed: false,false,false,false,false
  IsTorExit: 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
  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: 1440,1440,1440,1440,1440 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: 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: 987,987,1341,1341,1341 passed: false,false,false,false,false
  expression: undefined desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1341,1341,1341,1341,1341 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: 1237,1278,1278,1278,1278 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: 2560,2560,2560,2560,2560 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: 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: 1880,1880,1240,1240,1240 passed: false,false,false,false,false
  expression: undefined desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1240,1240,1240,1240,1240 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: 1415,1415,1415,1415,1415 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: 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: 1061,1061,1415,1415,1415 desired value: 987,987,1341,1341,1341 passed: false,false,false,false,false
  expression: outerHeight desired expression: innerHeight actual value: 1415,1415,1415,1415,1415 desired value: 1341,1341,1341,1341,1341 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: 1237,1278,1278,1278,1278 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: 1440,1440,1440,1440,1440 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: 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: 987,987,1341,1341,1341 passed: false,false,false,false,false
  expression: screen.height desired expression: innerHeight actual value: 1440,1440,1440,1440,1440 desired value: 1341,1341,1341,1341,1341 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: 1237,1278,1278,1278,1278 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: 2560,2560,2560,2560,2560 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: 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: 1880,1880,1240,1240,1240 passed: false,false,false,false,false
  expression: screen.width desired expression: innerWidth actual value: 2560,2560,2560,2560,2560 desired value: 1240,1240,1240,1240,1240 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: 2582,2582,2582,2582,2582 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2582,2582,2582,2582,2582 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2582,2582,2582,2582,2582 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 0,0,0,0,0 desired value: 0,0,0,0,0 passed: true,true,true,true,true
  expression: screenX desired expression: 0 actual value: 2773,2773,2773,2773,2773 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2773,2773,2773,2773,2773 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: 320,320,1280,1280,1280 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 1280,1280,1280,1280,1280 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenX desired expression: 0 actual value: 2560,0,0,0,0 desired value: 0,0,0,0,0 passed: false,true,true,true,true
  expression: screenX desired expression: 0 actual value: 29,29,29,29,29 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: 25,25,25,25,25 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: 25,25,25,25,25 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 116,116,116,116,116 desired value: 0,0,0,0,0 passed: false,false,false,false,false
  expression: screenY desired expression: 0 actual value: 116,116,116,116,116 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: 202,202,25,25,25 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: 137,137,137,137,137 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,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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
igshidInstagram tracking parameter
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
mkt_tokAdobe Marketo tracking parameter
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 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,true
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false
  value: 3230257842465605 passed: false,false,false,false,false