Nightly Builds(default settings) |
brave 1.98 |
chrome 156.0 |
duckduckgo 1.209 |
edge 156.0 |
firefox 159.0a1 |
opera 137.0 |
tor 16.0a12 |
vivaldi 8.3 |
|---|---|---|---|---|---|---|---|---|
|
State Partitioning testsWhich browsers isolate websites to prevent them from sharing data to track you?
A 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-Svc
Alt-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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party: h3, h3, h3, h3, h3
result, different first party: h2, h2, h2, h2, h2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party: h3, h3, h3, h3, h3
result, different first party: h2, h2, h2, h2, h2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
result, different first party: h2, h2, h2, h2, h2
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party: h3, h3, h3, h3
result, different first party: h2, h2, h2, h2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party: h3, h3, h3, h3, h3
result, different first party: h2, h2, h2, h2, h2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party: h3, h3, h3, h3, h3
result, different first party: h2, h2, h2, h2, h2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
result, different first party: h2, h2, h2, h2, h2
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same first party: h3, h3, h3, h3
result, different first party: h2, h2, h2, h2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
blob
A 'blob URL' is a local reference to some raw data. Trackers can use a blob URL to share data between websites. |
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party:
Error: Load failed,
Error: Load failed,
Error: Load failed,
Error: Load failed,
Error: Load failed
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party:
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party:
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.,
Error: NetworkError when attempting to fetch resource.
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${baseURI}blob?mode=write&key=${secret}&blobUrl=${encodeURIComponent(blobURL)}`);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async (secret) => {
const response = await fetch(`${baseURI}blob?mode=read&key=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
BroadcastChannel
A BroadcastChannel is designed to send messages between tabs. In some browsers it can be used for cross-site communication and tracking. |
write: (secret) => {
try {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
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 {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
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 {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
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 {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party:
Error: no BroadcastChannel message,
Error: no BroadcastChannel message,
Error: no BroadcastChannel message,
Error: no BroadcastChannel message
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
try {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
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 {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
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 {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
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: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const 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) => {
const bc = new BroadcastChannel('secrets');
bc.onmessage = (event) => {
if (event.data !== 'request') {
resolve(event.data);
}
};
bc.postMessage('request');
setTimeout(() => reject(new Error('no BroadcastChannel message')), 3000);
})
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party:
Error: no BroadcastChannel message,
Error: no BroadcastChannel message,
Error: no BroadcastChannel message,
Error: no BroadcastChannel message
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
CacheStorage
The 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 {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party:
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party:
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party:
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d_http,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_http,
994d2419-173b-460a-a9f4-be51e1d09e24_http,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_http,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_http
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560_http,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_http,
804e82ab-6930-494e-abd0-c2fe80b9c4de_http,
3996224d-92d9-481c-b598-83c2069eda20_http,
6e172b89-c10d-4319-8fab-3ae69088df0e_http
result, different first party:
e6fc4d89-340d-4858-a365-01abe9733560_http,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_http,
804e82ab-6930-494e-abd0-c2fe80b9c4de_http,
3996224d-92d9-481c-b598-83c2069eda20_http,
6e172b89-c10d-4319-8fab-3ae69088df0e_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_http,
c0c77c97-fc01-453c-b185-02641f868629_http,
7caab837-d4ff-4bc0-9ffe-ab2224360259_http,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_http,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_http
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e_http,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_http,
5aff633d-c958-4e07-b1c6-a66013b24b63_http,
85d21032-10f8-47a4-9c42-ed6fac078de2_http
result, different first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e_http,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_http,
5aff633d-c958-4e07-b1c6-a66013b24b63_http,
85d21032-10f8-47a4-9c42-ed6fac078de2_http
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3_http,
ea331b81-c39f-48cb-bc43-ef77e69378a9_http,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_http,
bc09e492-a356-4bbf-8348-f4341710253d_http,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_http
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a_http,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_http,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_http,
7aa4df6a-6d3e-454b-a8e4-42383590895a_http,
395e7b8b-df3c-4084-892f-40149dabe66a_http
result, different first party:
1e925902-0365-4f6e-90fb-4031e200ee0a_http,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_http,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_http,
7aa4df6a-6d3e-454b-a8e4-42383590895a_http,
395e7b8b-df3c-4084-892f-40149dabe66a_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168_http,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_http,
9a33835f-89aa-4a21-aa03-f845f483db30_http,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_http,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_http
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_http,
343f9215-b725-4478-af43-45ccd926c9f3_http,
d5757c77-f295-419e-ba50-337fe77ef97d_http,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_http
result, different first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_http,
343f9215-b725-4478-af43-45ccd926c9f3_http,
d5757c77-f295-419e-ba50-337fe77ef97d_http,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_http
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d_js,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_js,
994d2419-173b-460a-a9f4-be51e1d09e24_js,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_js,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560_js,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_js,
804e82ab-6930-494e-abd0-c2fe80b9c4de_js,
3996224d-92d9-481c-b598-83c2069eda20_js,
6e172b89-c10d-4319-8fab-3ae69088df0e_js
result, different first party:
e6fc4d89-340d-4858-a365-01abe9733560_js,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_js,
804e82ab-6930-494e-abd0-c2fe80b9c4de_js,
3996224d-92d9-481c-b598-83c2069eda20_js,
6e172b89-c10d-4319-8fab-3ae69088df0e_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_js,
c0c77c97-fc01-453c-b185-02641f868629_js,
7caab837-d4ff-4bc0-9ffe-ab2224360259_js,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_js,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e_js,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_js,
5aff633d-c958-4e07-b1c6-a66013b24b63_js,
85d21032-10f8-47a4-9c42-ed6fac078de2_js
result, different first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e_js,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_js,
5aff633d-c958-4e07-b1c6-a66013b24b63_js,
85d21032-10f8-47a4-9c42-ed6fac078de2_js
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3_js,
ea331b81-c39f-48cb-bc43-ef77e69378a9_js,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_js,
bc09e492-a356-4bbf-8348-f4341710253d_js,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a_js,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_js,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_js,
7aa4df6a-6d3e-454b-a8e4-42383590895a_js,
395e7b8b-df3c-4084-892f-40149dabe66a_js
result, different first party:
1e925902-0365-4f6e-90fb-4031e200ee0a_js,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_js,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_js,
7aa4df6a-6d3e-454b-a8e4-42383590895a_js,
395e7b8b-df3c-4084-892f-40149dabe66a_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168_js,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_js,
9a33835f-89aa-4a21-aa03-f845f483db30_js,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_js,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_js,
343f9215-b725-4478-af43-45ccd926c9f3_js,
d5757c77-f295-419e-ba50-337fe77ef97d_js,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_js
result, different first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_js,
343f9215-b725-4478-af43-45ccd926c9f3_js,
d5757c77-f295-419e-ba50-337fe77ef97d_js,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_js
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. |
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. |
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_43436901230981606,
fake_5419170898616801,
fake_39937403527301263,
fake_5866378647196242,
fake_22701557465243916
result, different first party:
fake_4382838753329721,
fake_7262065285716348,
fake_33469382831650574,
fake_803140363141758,
fake_740416264573037
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_022072239515962933,
fake_433397852154189,
fake_5116405525169356,
fake_585887627622145,
fake_8316118004249891
result, different first party:
fake_022072239515962933,
fake_433397852154189,
fake_5116405525169356,
fake_585887627622145,
fake_8316118004249891
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_08804189003282548,
fake_34656424944236686,
fake_45152328125628904,
fake_6360650942974806,
fake_3246823803715624
result, different first party:
fake_5595110394350167,
fake_7193949322673425,
fake_9731180560285,
fake_4060917148568872,
fake_9986285960174266
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_6837677342077979,
fake_6778461503793087,
fake_7175867490407437,
fake_7036316789225312
result, different first party:
fake_6837677342077979,
fake_6778461503793087,
fake_7175867490407437,
fake_7036316789225312
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_8921444570526473,
fake_3495190388485201,
fake_9602054764969963,
fake_7330115167521671,
fake_7013788254303392
result, different first party:
fake_5455354645587676,
fake_1478004434914073,
fake_9414365490720824,
fake_5434631443194005,
fake_4946805522661064
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_8191942239320005,
fake_6153110201968288,
fake_2822248107558458,
fake_4912628289227603,
fake_5718288605214368
result, different first party:
fake_8191942239320005,
fake_6153110201968288,
fake_2822248107558458,
fake_4912628289227603,
fake_5718288605214368
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_6353443977587667,
fake_04331992194539702,
fake_8657920240952492,
fake_6648749746966698,
fake_14918622625778166
result, different first party:
fake_467273333574165,
fake_9217399445184813,
fake_07451908882445624,
fake_8229855392432672,
fake_8577055078604392
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same first party:
fake_7133382765861558,
fake_5542486422654416,
fake_6931276643938213,
fake_9089639713611317
result, different first party:
fake_7133382765861558,
fake_5542486422654416,
fake_6931276643938213,
fake_9089639713611317
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
favicon cache
A 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same first party: 1, 1, 1, 1
result, different first party: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (key) => key
read: async (key) => {
// Wait for the favicon to load (defined in supercookies.html)
await sleepMs(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same first party: 2, 2, 2, 2
result, different first party: 3, 3, 3, 3
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
fetch cache
When 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. |
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const 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) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const 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) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const 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) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const 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) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const 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) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const 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) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
getDirectory
navigator.storage.getDirectory exposes a location for storing files to web content. In some cases, these files may be shared across tabs. |
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt', { create: true });
const stream = await fileHandle.createWritable();
await stream.write(secret);
await stream.close();
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
try {
const root = await navigator.storage.getDirectory();
const fileHandle = await root.getFileHandle('secret.txt');
const file = await fileHandle.getFile();
return file.text();
} catch (e) {
throw new Error('Unsupported');
}
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
H1 connection
HTTP/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.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
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.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
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.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
H2 connection
HTTP/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.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
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.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
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.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
H3 connection
HTTP/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.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party:
6d98bc894c8e2bbf82f01f74859415d8,
04061a5d70ce1defa9f0b755286301e1,
ecc670862655d5048e81b663b7693ac4,
e358c33562d239292ca9472668cb7822,
5a9dd1df9563ddb39b6fa3f12a052838
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Ensure that we can switch over to h3 via alt-svc:
for (let i = 0; i < 3; ++i) {
await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party:
a3307b4956510b1f9f2d74f8dee557fe,
d02235fbd4699e108e45e64ddbfa5a66,
9229648ab1d579aea9625e72f0184a49,
18403a961ebe914d5d84376e6e2d9564,
5c2b4a7ceb658d4c447aaf77d237aaff
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Ensure that we can switch over to h3 via alt-svc:
for (let i = 0; i < 3; ++i) {
await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party: , , , ,
result, different first party: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (secret) => {
// Ensure that we can switch over to h3 via alt-svc:
for (let i = 0; i < 3; ++i) {
await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party:
29625ed54f0ed500a316fbacfaad0c1f,
40aa168e4fb83433a4b4d37890dc28d3,
54c1ec964003b40f31299fde457aab9d,
c85884197d76becdcfe9edf214a30699
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
// Ensure that we can switch over to h3 via alt-svc:
for (let i = 0; i < 3; ++i) {
await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party:
3f7db0af2385bb14830eb14db561eeb9,
8c108e1712636b138d9a698f9fd85b9d,
87e532c9a6e328efe1af57abc272900a,
6c561cec4721b50e5b97f6e6ff2eaa0f,
6bc1c2b1ca61095d10504bcfa27b5d30
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Ensure that we can switch over to h3 via alt-svc:
for (let i = 0; i < 3; ++i) {
await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party:
30dc79b8cb8f95165a64d4d208e5a0d3,
da871571274f7146a7cbb028f5fc6701,
1cc7e2cc5fb6143a7b497ebc51f8974b,
cfc97b3eb0d080c57933da945294b51c,
73acd34036211ca466ab6e1849a1e781
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Ensure that we can switch over to h3 via alt-svc:
for (let i = 0; i < 3; ++i) {
await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party: , , , ,
result, different first party: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (secret) => {
// Ensure that we can switch over to h3 via alt-svc:
for (let i = 0; i < 3; ++i) {
await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
await sleepMs(500);
}
// Are we now connecting over h3?
const response = await fetch('https://h3.privacytests2.org:4434/connection_id', { cache: 'no-store' });
const text = await response.text();
// Empty response text indicates we are not connecting over h3:
if (text.trim() === '') {
throw new Error('Unsupported');
}
}
read: async () => {
const response = await fetch('https://h3.privacytests2.org:4434/connection_id');
return await response.text();
}
result, same first party:
30e6eb350646d2fb42b522607edd1036,
90b3e33b1f7265fb82d7de03d16a3749,
10bc5a6355bbb3307fdc50f5dad1ed88,
481f010aab0c17d4c9170cc82ad7a565
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
HSTS cache
The HTTP Strict-Transport-Security response header allows a website to signal that it should only be accessed via HTTPS. The browser remembers this directive in a database, but if this database is not partitioned, then it can be used to track users across websites." |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: , , , not tested, not tested result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, Upgraded to https, Upgraded to https unsupported: , , , false, false passed: true, true, true, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
|
HSTS cache (fetch)
The HTTP Strict-Transport-Security response header allows a website to signal that it should only be accessed via HTTPS. The browser remembers this directive in a database, but if this database is not partitioned, then it can be used to track users across websites." |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: , , , not tested, not tested result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, Upgraded to https, Upgraded to https unsupported: , , , false, false passed: true, true, true, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false passed: false, false, false, false test failed: false, false, false, false |
|
iframe cache
An 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
image cache
Caching 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const 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, 2, 1, 2, 2
unsupported: false, false, false, false, false
passed: false, true, false, true, true
test failed: false, false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 1, 2
unsupported: false, false, false, false
passed: false, false, false, true
test failed: false, false, false, false
|
|
indexedDB
The 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:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
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:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
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:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
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:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party: undefined
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
try {
return await IdbKeyVal.set('secret', secret);
} catch (e) {
throw new Error('Unsupported');
}
}
read: () => IdbKeyVal.get('secret')
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
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:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
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:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party:
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure
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:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party: undefined
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
localStorage
The 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) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
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: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
locks
navigator.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((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party:
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name')
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((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party:
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name')
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((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party:
Error: undefined is not an object (evaluating 'queryResult.held[0].name'),
Error: undefined is not an object (evaluating 'queryResult.held[0].name'),
Error: undefined is not an object (evaluating 'queryResult.held[0].name'),
Error: undefined is not an object (evaluating 'queryResult.held[0].name'),
Error: undefined is not an object (evaluating 'queryResult.held[0].name')
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((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party:
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name')
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
if (navigator.locks) {
navigator.locks.request(key, lock => new Promise((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party:
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
if (navigator.locks) {
navigator.locks.request(key, lock => new Promise((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party:
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name')
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((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party:
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context,
Error: LockManager.query: query() is not allowed in this context
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
if (navigator.locks) {
navigator.locks.request(key, lock => new Promise((resolve) => {}));
const queryResult = await navigator.locks.query();
return queryResult.held[0].clientId;
} else {
throw new Error('Unsupported');
}
}
read: async () => {
if (navigator.locks) {
const queryResult = await navigator.locks.query();
return queryResult.held[0].name;
}
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party:
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name'),
Error: Cannot read properties of undefined (reading 'name')
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
prefetch cache
A <link rel='prefetch'...> 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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const 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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const 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, 2, 2
unsupported: false, false, false, false, false
passed: false, true, false, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const 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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 1, 2
unsupported: false, false, false, false
passed: false, false, false, true
test failed: false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const 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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same first party: 1, 1, 1, 1, 1
result, different first party: 1, 1, 1, 2, 1
unsupported: false, false, false, false, false
passed: false, false, false, true, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const 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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 2, 2
unsupported: false, false, false, false
passed: false, false, true, true
test failed: false, false, false, false
|
|
script cache
Caching of scripts 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
SharedWorker
The SharedWorker API allows scripts from multiple tabs to share a background thread of computation. If SharedWorker is not partitioned, then it can be abused to shared data between websites in your browser. |
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party: none, none, none, none, none
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party: none, none, none, none, none
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party: none, none, none, none, none
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party: none, none, none, none
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party: none, none, none, none, none
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party: none, none, none, none, none
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party:
Error: SharedWorker constructor: StorageAccess denied.,
Error: SharedWorker constructor: StorageAccess denied.,
Error: SharedWorker constructor: StorageAccess denied.,
Error: SharedWorker constructor: StorageAccess denied.,
Error: SharedWorker constructor: StorageAccess denied.
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
try {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
// console.log("worker", worker);
const messagePromise = new Promise((resolve) => {
worker.port.onmessage = (e) => resolve(e.data);
});
worker.port.postMessage(secret);
await messagePromise;
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const worker = new window.SharedWorker('supercookies_sharedworker.js');
worker.port.start();
const messagePromise = new Promise((resolve, reject) => {
worker.port.onmessage = (e) => resolve(e.data);
setTimeout(() => reject(new Error('no SharedWorker message received')), 200);
});
worker.port.postMessage('request');
const message = await messagePromise;
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same' && message === 'none') {
throw new Error('Unsupported');
}
return message;
}
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party: none, none, none, none
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
TLS Session ID
The 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 () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
dd9fd5599202ef12ce8b7748c8909a352458fe7577113b2d4d084615f6f8ebe4,
18e180ac197ca235b5cff4d18c546f6a7e6b19e54c46e189056d42ce55bfd131,
3f1e708d3971e4d6116bf99d26d80e3a9ec16e39c34f9bcc25d7dce37ecad904,
e9e803a2aa6ee243e8176b0bd723ee5f0eb5100c416ff1a04015ee7d7179c07e,
0b795409a9a1ef3010662c440633a04c015ff6c7b867d793e0af247bcad5619c
result, different first party:
23ba8bbbf1d31b3c7be3a793be3d31bcf8c33e80b9f7fd192e78c1a122eb0707,
cfa37bcf5d68eb819645f146b0c3ea88170d0c2d8c1c851a69abd65f5c9ee24a,
39f4e69473a1f96171b199b1359443103d1a392c462e0c3deb7ec09b6f8f4fb8,
de9c667b7397873069fc66f31ecd47dcdb6954e7649a5f88c00469706ec93d38,
d0b8d92505159b488335197ac913ace9e055ebaa5268f57521a584d3dea7f156
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
c984891ebc239f46b33a97b1b3d2ebeb94faeea72735e7dd5bf13958f2663501,
87653603457731ca03ccc2814ea1022d83a898f0434c4da2a770e7640668396d,
06c4a263a25b8a424bc1527b876a2c585f293d3b430e7af740c1b95b110fca5f,
dbff7079f7498d7c530fbc0a2b619f37427c362c52a2439a3b34ab1471247e78,
02bac0b26813467a4ba94dd36be48ad0642ba6cb6c5c8ac5c65bb8f7657f4a89
result, different first party:
6148c96a245cecf4768cfb37eaf75d40fb5d2b51bd04e867fe96473b809b4d6b,
0f631d44cfa1846184b0fcaac310f141f7e9bea856f93060505ed6df8472f4c9,
6adba7c49f0bb9c83a5e1c6f191fbdba7117576b21c389c91c369dfb29707338,
f198a36637426a3e3adcb7c0dada3545c8643e6bca9ac0134e08a749f2106695,
de3c731e42903dfd04f3b3b03f00a7d8b7b0f95320157f140db6bf6ea21f7115
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
e9c23f5d10c1b7eca79dbba8534dd3e5439d05c565cd72d607c874dec9307245,
311ddaf150db7f8a4154ea646d9256fe92aa8dbb2759f66cdbe32ad164bf896b,
ad402f23f01b8d7e58e47a6a12a43a2432de368452a6e9f00a076281e7616066,
1413f789c2cf04452178693ce0070fefcdae3642d833f9c9b24fb459354c3134,
698b1e4c284fb9f4f1a074c5d839fcf02fec16885c714a0e78da80e844b572d1
result, different first party:
478fb266e65e40a9cfdd008dddef64b702debef580016e9583445bba38180cfa,
d2fc1b83ace5fb310db7bfc64b0197d822fd3c600ccf36688da395b9261e19bf,
13be78ef38954d5c0dba691fbff18b62330a47d08b36c3d93266629b74d74b88,
c786da080594c84b37743b0fe1dbb13c6fd05f4ec8627f832e2a8fdc8dfe6ffd,
76701bef05117b905ed8712eda95beb4566564383d657715688fce7dde635315
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
a8b2a488f65691310f4d5604c2c6a109ea0e8a65bd07b9a5f27839a146a83b01,
1a554a273f8d656b50bc8af5a943e3ec0edce50b0cb838f4cdf92d05ae7b8488,
b9bb26990bf4effd0abce89aff7c887312552e5eeb7ed203c95ed02446da65f8,
42e4e06265d641cfda6a614ad5c23eac1a4138b77862678b0c27a4d1ce874683
result, different first party:
418319b58e7b53644818b69b6ec767926058750f44a42df4ae41420302542d06,
d076181b6a025c03e33ee2f833c49fb40e851959db694b9c5b4e93ec94275121,
73fcd3fb6d37ba4ae5bbd582aa485fd36eb913dd85616639a3d18b9803ae1b83,
4c70af48a23a38b53e52438b12a967165828f06833a0857761de87af3aeb78c2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
3b59fafe3644436d4685bf19bff4d56d3a8c801e0d67f2202dec95e13390ebc3,
a3ec356039f1893d10d3a61e668a91b96a105283981c2ed69fdfd21748f5518b,
cfc2b82673d3f32a2a92cf4833d99b8f7d6c24b2e26f1f6c4f37301a53e0c644,
9b336182021f563ad49762c82cbe82949fc9c21eceded26c47a60d7d5d9f18d3,
5966d46513ec0089c22732e7d36829d8b0d9659e01ef3f80c532557d35be121e
result, different first party:
df5f6ad9ace33b7a5053fe30f85bcf8cf5d80f8aaafa15b27211c8308021b5a8,
9044ecd2fb732bbc681851c8a5ef0a204ff44cdf7cef63367f9436e1f9b31c18,
8cec7b01c78d67c29091e2cb157c163d7308d2aa30ce82cf55e881f410b0f240,
b0133006dc437e1b30cc9e4ae637f97f8ac5f736eb32e465fb0bf5f7ce7ebb90,
207bcc1ff3c547f46e79a22a066107a5afc58fdf83ac8b5639417de91da5334b
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
7d2d9f3d7e761363e7516c697bbaa4ffb67ebe9085c99a23d18db31c65bbbf9b,
66a5361b870c5df01fa963a2b4c3b2bba7d16ea1f8d46605f3fda88fc64663ce,
d499f9a52650aca70c9dfbaa0ac66e18303728d38ad65fe15730ff7e0047e908,
e5480e653daf0c99cdec76ca9c69d14b8dbb93121026adce334bca4ad6c26d6c,
c4c2ac72dc6abb3e026b9b146f7baf8361cb084cb3ff2c17ac9fbdbef34a73cd
result, different first party:
bcba9bdff14d216a5f9d4140c43c5e32d16fae9d8dc631f15ad45b00a46fcb6d,
47675397a30f3e0ec6199b3168c953ad92b57b1ea35e2808af6e1dbbbdabeb5c,
09fd40e223b28cee54bf2c4eb79c31cd8ca3c9482f7c7db23cb9a2c50ab2ddfd,
2b06ea8373467f48563424b74098d920dd3ca8c07d51eaf8c7f95fbfaa452b69,
11538589a2d2375b83973b6ee227a325c7ab2ebf836cbc7669c8a2545a956b27
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
fca0b0fc5e131c7f810c131ae254a67b9a57e2c82f8254867563054803786785,
b25f0243e62d5cdc2c9684fe4ed2d3468492cfb15792ca424414335abe38909b,
2be341235df8ca65979085a33ff4026f0776f67e77894907605225186f501e7b,
9f370ad341e110b382c7c3c0133f10892686847062e660e449e36bd500f3dd67,
0adde0845bee054f241209233f0fc2add5c6a05f82f406eaab87c615ac335e52
result, different first party:
fff4bbc7f2ed53113040929a3a4ed27107da43300a0ba0444378ac6f9fad72d7,
412ec754f24952a75b54d052e91909fa790e94485c34e89c11c0680a40d1e708,
d3947e00c7fcd26b08d6e49b5026406a66fdd956ae3ca0d549cb776d8533223a,
dff87b9d74e14f91f551a1db34a8ec7a24eda05e44312993a21c60a4dadff62d,
41802f3738225755c31899134062e0a3ca3afc1968191aa184a89c7b1306eca8
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
read: async () => {
const results = await fetch('https://tls.privacytests2.org:8900/');
return (await results.json()).sessionId;
}
result, same first party:
a4f569c9ae55f073f6c20867aaab510ef8743afbe044c0e9aa303cd537724232,
0c4c34992d4a9d345170247081ca59afb3186d29608493f7dcb69cfdff00c5de,
1c37d7630871ccc1e5b33ddfa29705e8927ee591adffb1f7318a49db8650f741,
e2aa0eefea5b1c5eeaaa7a09b0c58f97f838e58fc328c4f997aaef7e520fbd6e
result, different first party:
ecfdeba319763117e09d2b4258d9819341cf0ae356925dae674f1253a82a1d78,
aad4acb4025841cbf3b7ec3cf303801b97c2db21e62e04dad2c41ac9c19d38c5,
6b86c7a91e3924bf2591f25a28fca1b16e62fc6068c00cc9e9db0a7a756557ec,
f18107f377d0976c71b54028cd94561ef64eef7d19d16586c61ee51ed2b84482
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. |
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same first party: 1, 1, 1, 1
result, different first party: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
Navigation testsWhich browsers prevent websites from sharing tracking data when you click on a link?
When 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.referrer
The Referer [sic] request header is a mechanism used by browsers to let a website know where the user is visiting from. This header is inherently tracking users across websites. In recent times, browsers have switched to a policy of trimming a referrer to convey less tracking information, but Referer continues to convey cross-site tracking data by default. |
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { /* do nothing */ }
read: () => document.referrer
result, same first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
result, different first party:
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/,
https://test-pages.privacytests2.org/
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
sessionStorage
The 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) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
370b423a-5521-4ddb-961e-88da63ce388d,
c936bc15-7e11-4a4c-aa12-eb0640b8271d,
994d2419-173b-460a-a9f4-be51e1d09e24,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
e6fc4d89-340d-4858-a365-01abe9733560,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
804e82ab-6930-494e-abd0-c2fe80b9c4de,
3996224d-92d9-481c-b598-83c2069eda20,
6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
c0c77c97-fc01-453c-b185-02641f868629,
7caab837-d4ff-4bc0-9ffe-ab2224360259,
fc962a88-f7a7-4350-8f97-f81f02a3ede5,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
0f3d1812-d60f-4484-94c1-b4737eb5883e,
4b7957d7-c5c7-440d-b99f-d66c3b91320b,
5aff633d-c958-4e07-b1c6-a66013b24b63,
85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
c49e67d9-a3fb-4950-b06e-4193284860c3,
ea331b81-c39f-48cb-bc43-ef77e69378a9,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
bc09e492-a356-4bbf-8348-f4341710253d,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
1e925902-0365-4f6e-90fb-4031e200ee0a,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
25de9ab1-3320-4ad8-8c53-1faf4329fad3,
7aa4df6a-6d3e-454b-a8e4-42383590895a,
395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
e169150f-1970-4313-ba7c-f9e3e7399168,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
9a33835f-89aa-4a21-aa03-f845f483db30,
7b4c6de7-4afd-4dd0-8179-737bbece97c7,
f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => window.sessionStorage.setItem('secret', secret)
read: () => window.sessionStorage.getItem('secret')
result, same first party:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
343f9215-b725-4478-af43-45ccd926c9f3,
d5757c77-f295-419e-ba50-337fe77ef97d,
fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
|
window.name
The window.name API allows websites to store data that will persist after the user has navigated the tab to a different website. This mechanism could be partitioned so that data is not allowed to persist between websites. |
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_370b423a-5521-4ddb-961e-88da63ce388d,
name_c936bc15-7e11-4a4c-aa12-eb0640b8271d,
name_994d2419-173b-460a-a9f4-be51e1d09e24,
name_1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53,
name_dd6f8907-8cc4-4f98-a7bd-520032e39d6f
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_e6fc4d89-340d-4858-a365-01abe9733560,
name_414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
name_804e82ab-6930-494e-abd0-c2fe80b9c4de,
name_3996224d-92d9-481c-b598-83c2069eda20,
name_6e172b89-c10d-4319-8fab-3ae69088df0e
result, different first party:
name_e6fc4d89-340d-4858-a365-01abe9733560,
name_414b79e4-fb0b-4e57-9e87-08ee47e1b7c1,
name_804e82ab-6930-494e-abd0-c2fe80b9c4de,
name_3996224d-92d9-481c-b598-83c2069eda20,
name_6e172b89-c10d-4319-8fab-3ae69088df0e
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26,
name_c0c77c97-fc01-453c-b185-02641f868629,
name_7caab837-d4ff-4bc0-9ffe-ab2224360259,
name_fc962a88-f7a7-4350-8f97-f81f02a3ede5,
name_aec43521-3bbf-42e5-b48e-d13a84fb4fc8
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_0f3d1812-d60f-4484-94c1-b4737eb5883e,
name_4b7957d7-c5c7-440d-b99f-d66c3b91320b,
name_5aff633d-c958-4e07-b1c6-a66013b24b63,
name_85d21032-10f8-47a4-9c42-ed6fac078de2
result, different first party:
name_0f3d1812-d60f-4484-94c1-b4737eb5883e,
name_4b7957d7-c5c7-440d-b99f-d66c3b91320b,
name_5aff633d-c958-4e07-b1c6-a66013b24b63,
name_85d21032-10f8-47a4-9c42-ed6fac078de2
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_c49e67d9-a3fb-4950-b06e-4193284860c3,
name_ea331b81-c39f-48cb-bc43-ef77e69378a9,
name_7d5ff3d2-e28e-43fb-82ae-142e00b513c2,
name_bc09e492-a356-4bbf-8348-f4341710253d,
name_472ff9ed-519c-43b8-8fd6-1eec9ba5d825
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_1e925902-0365-4f6e-90fb-4031e200ee0a,
name_0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
name_25de9ab1-3320-4ad8-8c53-1faf4329fad3,
name_7aa4df6a-6d3e-454b-a8e4-42383590895a,
name_395e7b8b-df3c-4084-892f-40149dabe66a
result, different first party:
name_1e925902-0365-4f6e-90fb-4031e200ee0a,
name_0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0,
name_25de9ab1-3320-4ad8-8c53-1faf4329fad3,
name_7aa4df6a-6d3e-454b-a8e4-42383590895a,
name_395e7b8b-df3c-4084-892f-40149dabe66a
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_e169150f-1970-4313-ba7c-f9e3e7399168,
name_e53e4980-7b09-4fc1-aa42-e8377e1c51cf,
name_9a33835f-89aa-4a21-aa03-f845f483db30,
name_7b4c6de7-4afd-4dd0-8179-737bbece97c7,
name_f33b17a5-1862-413b-8f22-1cc5923bcbe1
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.name = 'name_' + secret; }
read: () => window.name
result, same first party:
name_aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
name_343f9215-b725-4478-af43-45ccd926c9f3,
name_d5757c77-f295-419e-ba50-337fe77ef97d,
name_fbe3546a-e1cf-47af-96b8-dde0378a8be9
result, different first party:
name_aba7dba8-0f5d-46f8-ab7b-18d316fb3b36,
name_343f9215-b725-4478-af43-45ccd926c9f3,
name_d5757c77-f295-419e-ba50-337fe77ef97d,
name_fbe3546a-e1cf-47af-96b8-dde0378a8be9
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
HTTPS testsWhich browsers prevent unencrypted network connections?
HTTPS 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 website warning
Checks to see if the browser stops loading an insecure website and warns the user before giving them the option to continue. Known as HTTPS-Only Mode in some browsers. |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: true, true, true, false, false result: Insecure website never loaded, Insecure website never loaded, Insecure website never loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: true, true, true, true, true result: Insecure website never loaded, Insecure website never loaded, Insecure website never loaded, Insecure website never loaded, Insecure website never loaded |
passed: false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
|
Upgradable address
Checks to see if an insecure address entered into the browser's address bar is upgraded to HTTPS whenever possible. |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true, true, true, true passed: true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true passed: true, true, true, true |
|
Upgradable hyperlink
Checks 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: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: false, false, false, false, false passed: false, false, false, false, false |
upgraded: true, true, true, true passed: true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true, true passed: true, true, true, true, true |
upgraded: true, true, true, true passed: true, true, true, true |
|
Upgradable image
Checks 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 result: upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true result: upgraded, upgraded, upgraded, upgraded |
|
Upgradable script
Checks 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 result: blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: blocked, blocked, blocked, blocked, blocked |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true result: blocked, blocked, blocked, blocked |
|
Misc testsWhich browsers provide additional assorted privacy protections?
This category includes tests for the presence of miscellaneous privacy features |
||||||||
|
ECH enabled
Encrypted Client Hello (ECH) is a new protocol that hides the website you are visiting from third-party network eavesdroppers. |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: plaintext passed: false, false, false, false, false |
SNI_status: encrypted passed: true, true, true, true |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: encrypted passed: true, true, true, true, true |
SNI_status: plaintext passed: false, false, false, false, false |
SNI_status: encrypted passed: true, true, true, true |
|
GPC enabled first-party
The Global Privacy Control is an HTTP header that can be sent by a browser to instruct a website not to sell the user's personal data to third parties. This test checks to see if the GPC header is sent by default to the top-level website. |
header value: 1 passed: true, true, true, true, true |
header value: undefined passed: false, false, false, false, false |
header value: 1 passed: true, true, true, true, true |
header value: undefined passed: false, false, false, false |
header value: undefined passed: false, false, false, false, false |
header value: undefined passed: false, false, false, false, false |
header value: 1 passed: true, true, true, true, true |
header value: undefined passed: false, false, false, false |
|
GPC enabled third-party
The Global Privacy Control is an HTTP header that can be sent by a browser to instruct a visited website not to sell the user's personal data to other parties. This test checks to see if the GPC header is sent to third-party elements on the web page. |
sec-gpc: 1 passed: true, true, true, true, true |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false, false |
sec-gpc: 1 passed: true, true, true, true, true |
passed: false, false, false, false |
|
IP address hidden
IP 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, true, false, false, true |
passed: false, true, false, true, true |
passed: false, true, true, false, true |
passed: false, false, false, true |
passed: false, true, false, false, false |
passed: false, true, false, false, false |
passed: true, true, true, true, true |
passed: false, true, false, true |
|
Stream isolation
Browsers that use Tor can use a different Tor circuit per top-level website. |
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: false, false, false, false, false
readSameFirstParty:
2605:6400:30:f7c0:8511:b113:ca11:9baa,
2a0b:f4c2::11,
185.225.69.187,
2620:7:6003::102,
2001:880:0:2:f816:3eff:fe8f:7951
readDifferentFirstParty:
2a0b:f4c2::22,
2a0b:f4c2::21,
2a0b:f4c2:1::1,
2001:67c:e60:c0c:192:42:116:64,
2a03:e600:100::5
passed: true, true, true, true, true
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false
|
|
Tor enabled
The Tor network sends the browser's web requests through a series of relays to hide a user's IP address, thereby helping to mask their identity and location. This test checks to see if the Tor network is being used by default. |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false passed: false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
IsTorExit: true, true, true, true, true passed: true, true, true, true, true |
IsTorExit: false, false, false, false passed: false, false, false, false |
|
Fingerprinting resistance testsWhich browsers hide what's unique about your device?
Fingerprinting 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').`, |
||||||||
|
System font detection
Web 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: 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 |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false |
|
Tracking query parameter testsWhich browsers remove URL parameters that can track you?
When 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.)` |
||||||||
|
__hsfp
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
__hssc
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
__hstc
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
__s
Drip.com email address tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
_hsenc
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
_openstat
Yandex tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
dclid
DoubleClick Click ID (Google) |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
fbclid
Facebook Click Identifier |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
gclid
Google Click Identifier |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
hsCtaTracking
HubSpot tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
mc_eid
Mailchimp Email ID (email recipient's address) |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
mkt_tok
Adobe Marketo tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
ml_subscriber
MailerLite email tracking |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
|
ml_subscriber_hash
MailerLite email tracking |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
|
msclkid
Microsoft Click ID |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
oly_anon_id
Omeda marketing 'anonymous' customer id |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
oly_enc_id
Omeda marketing 'known' customer id |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
rb_clickid
Unknown high-entropy tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
|
s_cid
Adobe Site Catalyst tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
|
vero_conv
Vero tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
|
vero_id
Vero tracking parameter |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
wickedid
Wicked Reports e-commerce tracking |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
yclid
Yandex Click ID |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
value: 9130246813649054 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 9130246813649054 passed: false, false, false, false |
|
Tracker content blocking testsWhich browsers block important known tracking scripts and pixels?
When you visit a web page, it frequently has third-party embedded tracking content, such as scripts and tracking pixels. These embedded components spy on you. Some browsers and browser extensions maintain list of tracking companies and block their content from being loaded. This section checks to see if a browser blocks 20 of the largest trackers listed by https://whotracks.me.` |
||||||||
|
Adobe
Tests whether the browser blocks the page from loading the tracker at https://munchkin.marketo.net/munchkin.js |
url: https://munchkin.marketo.net/munchkin.js passed: true, true, true, true, true |
url: https://munchkin.marketo.net/munchkin.js |
url: https://munchkin.marketo.net/munchkin.js passed: true, true, true, true, true |
url: https://munchkin.marketo.net/munchkin.js |
url: https://munchkin.marketo.net/munchkin.js passed: , false |
url: https://munchkin.marketo.net/munchkin.js |
url: https://munchkin.marketo.net/munchkin.js passed: , false, false, false |
url: https://munchkin.marketo.net/munchkin.js passed: true, true, true, true |
|
Adobe Audience Manager
Tests whether the browser blocks the page from loading the tracker at https://dpm.demdex.net/ibs |
url: https://dpm.demdex.net/ibs passed: true, true, true, true, true |
url: https://dpm.demdex.net/ibs passed: false, false, false |
url: https://dpm.demdex.net/ibs passed: true, true, true, true, true |
url: https://dpm.demdex.net/ibs passed: false, false, false |
url: https://dpm.demdex.net/ibs passed: false, false, false, false, false |
url: https://dpm.demdex.net/ibs passed: , false, false |
url: https://dpm.demdex.net/ibs passed: false, false, false, false |
url: https://dpm.demdex.net/ibs passed: true, true, true, true |
|
Amazon adsystem
Tests whether the browser blocks the page from loading the tracker at https://s.amazon-adsystem.com/dcm |
url: https://s.amazon-adsystem.com/dcm passed: true, true, true, true, true |
url: https://s.amazon-adsystem.com/dcm passed: false |
url: https://s.amazon-adsystem.com/dcm passed: true, true, true, true, true |
url: https://s.amazon-adsystem.com/dcm passed: false |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: , false |
url: https://s.amazon-adsystem.com/dcm passed: false, false |
url: https://s.amazon-adsystem.com/dcm passed: true, true, true, true |
|
AppNexus
Tests whether the browser blocks the page from loading the tracker at https://ib.adnxs.com/px?id=178248&t=1 |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true, true, true, true, true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true, true, true, true, true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: false, false, false, false |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: true, true, true, true |
|
Bing Ads
Tests whether the browser blocks the page from loading the tracker at https://bat.bing.com/bat.js |
url: https://bat.bing.com/bat.js passed: true, true, true, true, true |
url: https://bat.bing.com/bat.js |
url: https://bat.bing.com/bat.js passed: true, true, true, true, true |
url: https://bat.bing.com/bat.js |
url: https://bat.bing.com/bat.js passed: false, false, false, false, false |
url: https://bat.bing.com/bat.js passed: , false |
url: https://bat.bing.com/bat.js passed: false, false, false, false |
url: https://bat.bing.com/bat.js passed: true, true, true, true |
|
Chartbeat
Tests whether the browser blocks the page from loading the tracker at https://static.chartbeat.com/js/chartbeat.js |
url: https://static.chartbeat.com/js/chartbeat.js passed: true, true, true, true, true |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: false, false, false, false, false |
url: https://static.chartbeat.com/js/chartbeat.js passed: true, true, true, true |
|
Criteo
Tests whether the browser blocks the page from loading the tracker at https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true, true, true, true, true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: , false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true, true, true, true, true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: , false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, true, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: true, true, true, true |
|
DoubleClick (Google)
Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: , false |
url: https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: false, false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true |
|
Facebook tracking
Tests whether the browser blocks the page from loading the tracker at https://connect.facebook.net/en_US/fbevents.js |
url: https://connect.facebook.net/en_US/fbevents.js passed: true, true, true, true, true |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: true, true, true, true, true |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: false, false, false, false, false |
url: https://connect.facebook.net/en_US/fbevents.js passed: true, true, true, true |
|
Google (third-party ad pixel)
Tests whether the browser blocks the page from loading the tracker at https://www.google.com/pagead/1p-user-list/ |
url: https://www.google.com/pagead/1p-user-list/ passed: true, true, true, true, true |
url: https://www.google.com/pagead/1p-user-list/ |
url: https://www.google.com/pagead/1p-user-list/ passed: true, true, true, true, true |
url: https://www.google.com/pagead/1p-user-list/ |
url: https://www.google.com/pagead/1p-user-list/ |
url: https://www.google.com/pagead/1p-user-list/ |
url: https://www.google.com/pagead/1p-user-list/ passed: false, false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: true, true, true, true |
|
Google Analytics
Tests whether the browser blocks the page from loading the tracker at https://google-analytics.com/urchin.js |
url: https://google-analytics.com/urchin.js passed: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: , false, false |
url: https://google-analytics.com/urchin.js passed: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: false, false |
url: https://google-analytics.com/urchin.js passed: false, false, false, false, false |
url: https://google-analytics.com/urchin.js passed: , false, false |
url: https://google-analytics.com/urchin.js passed: false, false, false, false |
url: https://google-analytics.com/urchin.js passed: true, true, true, true |
|
Google Tag Manager
Tests whether the browser blocks the page from loading the tracker at https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true, true, true, true, true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true, true, true, true, true |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: , false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: false, false, false |
url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL passed: true, true, true, true |
|
Index Exchange
Tests whether the browser blocks the page from loading the tracker at https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true, true, true, true, true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true, true, true, true, true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: false, false, false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true, true, true, true |
|
New Relic
Tests whether the browser blocks the page from loading the tracker at https://js-agent.newrelic.com/nr-1212.min.js |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true, true, true, true, true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true, true, true, true, true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: , false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: true, true, true, true |
|
Quantcast
Tests whether the browser blocks the page from loading the tracker at https://pixel.quantserve.com/pixel |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: false, false, false |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: false, false, false |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: , false |
url: https://pixel.quantserve.com/pixel passed: false, false, false |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true |
|
Scorecard Research Beacon
Tests whether the browser blocks the page from loading the tracker at https://sb.scorecardresearch.com/internal-c2/default/cs.js |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true, true, true, true, true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true, true, true, true, true |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: , false |
url: https://sb.scorecardresearch.com/internal-c2/default/cs.js passed: true, true, true, true |
|
Taboola
Tests whether the browser blocks the page from loading the tracker at https://trc.taboola.com/futureplc-tomsguide/trc/3/json |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true, true, true, true, true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true, true, true, true, true |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: true, true, true, true |
|
Twitter pixel
Tests whether the browser blocks the page from loading the tracker at https://t.co/i/adsct |
url: https://t.co/i/adsct passed: true, true, true, true, true |
url: https://t.co/i/adsct passed: , false, false, false, false |
url: https://t.co/i/adsct passed: true, true, true, true, true |
url: https://t.co/i/adsct passed: false, false |
url: https://t.co/i/adsct passed: false, false, false, false, false |
url: https://t.co/i/adsct passed: , false, false |
url: https://t.co/i/adsct passed: false, false, false |
url: https://t.co/i/adsct passed: true, true, true, true |
|
Yandex Ads
Tests whether the browser blocks the page from loading the tracker at https://yandex.ru/ads/system/header-bidding.js |
url: https://yandex.ru/ads/system/header-bidding.js passed: true, true, true, true, true |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: true, true, true, true |
|
Tracking cookie protection testsWhich browsers block important known tracking cookies?
A large fraction of web pages on the web have hidden third-party trackers that read and write cookies in your browser. These cookies can be used to track your browsing across websites. This section checks to see if a browser stops cross-site tracking by cookies from 20 of the largest trackers listed by https://whotracks.me.`, |
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Adobe
Tests whether the browser stops cookies from munchkin.marketo.net from tracking users across websites. |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://munchkin.marketo.net/munchkin.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: false, false, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: true, true, false, false, false |
passed: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, false, false |
|
Adobe Audience Manager
Tests whether the browser stops cookies from dpm.demdex.net from tracking users across websites. |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://dpm.demdex.net/ibs cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, false, false |
|
Amazon adsystem
Tests whether the browser stops cookies from s.amazon-adsystem.com from tracking users across websites. |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://s.amazon-adsystem.com/dcm cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, false, false, false |
|
AppNexus
Tests whether the browser stops cookies from ib.adnxs.com from tracking users across websites. |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: false, false, false, false url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true, true, true, true |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: false, false, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: true, true, false, false, false |
passed: true, true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, false, false |
|
Bing Ads
Tests whether the browser stops cookies from bat.bing.com from tracking users across websites. |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://bat.bing.com/bat.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: false, false, false, false url: https://bat.bing.com/bat.js cookieFound: true, true, true, true |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: false, false, true, true, true url: https://bat.bing.com/bat.js cookieFound: true, true, false, false, false |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false |
|
Chartbeat
Tests whether the browser stops cookies from static.chartbeat.com from tracking users across websites. |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://static.chartbeat.com/js/chartbeat.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, false, false, false |
|
Criteo
Tests whether the browser stops cookies from dis.criteo.com from tracking users across websites. |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, false, false, false |
|
DoubleClick (Google)
Tests whether the browser stops cookies from securepubads.g.doubleclick.net from tracking users across websites. |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: false, false, true, true, false url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: true, true, false, false, true |
passed: true, true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, false, false, false |
|
Facebook tracking
Tests whether the browser stops cookies from connect.facebook.net from tracking users across websites. |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://connect.facebook.net/en_US/fbevents.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: false, false, true, true, false url: https://connect.facebook.net/en_US/fbevents.js cookieFound: true, true, false, false, true |
passed: true, true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, false, false, false |
|
Google (third-party ad pixel)
Tests whether the browser stops cookies from www.google.com from tracking users across websites. |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://www.google.com/pagead/1p-user-list/ cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, false, false, false |
|
Google Analytics
Tests whether the browser stops cookies from google-analytics.com from tracking users across websites. |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://google-analytics.com/urchin.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: false, false, false, false url: https://google-analytics.com/urchin.js cookieFound: true, true, true, true |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: false, false, true, true, false url: https://google-analytics.com/urchin.js cookieFound: true, true, false, false, true |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false |
|
Google Tag Manager
Tests whether the browser stops cookies from www.googletagmanager.com from tracking users across websites. |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: false, false, false, false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true, true, true, true |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: false, false, true, true, false url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: true, true, false, false, true |
passed: true, true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false |
|
Index Exchange
Tests whether the browser stops cookies from dsum-sec.casalemedia.com from tracking users across websites. |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, false, false, false |
|
New Relic
Tests whether the browser stops cookies from js-agent.newrelic.com from tracking users across websites. |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: false, false, false, false url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true, true, true, true |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: false, false, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: true, true, false, false, false |
passed: true, true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, false, false |
|
Quantcast
Tests whether the browser stops cookies from pixel.quantserve.com from tracking users across websites. |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://pixel.quantserve.com/pixel cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, false, false |
|
Scorecard Research Beacon
Tests whether the browser stops cookies from sb.scorecardresearch.com from tracking users across websites. |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: false, false, false, false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true, true, true, true |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: false, false, true, true, false url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: true, true, false, false, true |
passed: true, true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false |
|
Taboola
Tests whether the browser stops cookies from trc.taboola.com from tracking users across websites. |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: false, false, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: true, true, false, false, false |
passed: true, true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, false, false, false |
|
Twitter pixel
Tests whether the browser stops cookies from t.co from tracking users across websites. |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://t.co/i/adsct cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: true, false, true, true, true url: https://t.co/i/adsct cookieFound: false, true, false, false, false |
passed: true, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, false, false |
|
Yandex Ads
Tests whether the browser stops cookies from yandex.ru from tracking users across websites. |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: false, false, false, false, false url: https://yandex.ru/ads/system/header-bidding.js cookieFound: true, true, true, true, true |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false, false |
passed: true, true, true, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, false, false, false |
|
Cross-session first-party tracking testsWhich browsers prevent websites from tracking you across browser sessions?
A common vulnerability of web browsers is that they allow websites ("first parties") to 'tag' your browser with some tracking data. This tag can be used to re-identify you when you return to a website you visited before. This category of leaks can be prevented by browser if they clean or isolate data between browser sessions. (In cases where a user has logged into a website or entered detailed information, it may be justifiable for a browser to retain information across sessions. These tests check when no such justification exists: when you have entered no significant information into a website, will the browser still retain data that allows you to be tracked across sessions?)
|
||||||||
|
Alt-Svc
Alt-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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3, h3
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3, h3
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h2, h2, h2, h2, h2
result, different session: h3, h3, h3, h3, h3
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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3
result, different session: h3, h3, h3, h3
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3, h3
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3, h3
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h2, h2, h2, h2, h2
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3
result, different session: h3, h3, h3, h3
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CacheStorage
The 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 {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_1p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p,
994d2419-173b-460a-a9f4-be51e1d09e24_1p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p
result, different session:
370b423a-5521-4ddb-961e-88da63ce388d_1p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p,
994d2419-173b-460a-a9f4-be51e1d09e24_1p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
result, different session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
e169150f-1970-4313-ba7c-f9e3e7399168_1p,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_1p,
9a33835f-89aa-4a21-aa03-f845f483db30_1p,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_1p,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_1p
result, different session:
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_1p_http,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p_http,
994d2419-173b-460a-a9f4-be51e1d09e24_1p_http,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p_http,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_1p_http,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p_http,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p_http,
3996224d-92d9-481c-b598-83c2069eda20_1p_http,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p_http
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_1p_http,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p_http,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p_http,
3996224d-92d9-481c-b598-83c2069eda20_1p_http,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p_http,
c0c77c97-fc01-453c-b185-02641f868629_1p_http,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p_http,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p_http,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p_http
result, different session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p_http,
c0c77c97-fc01-453c-b185-02641f868629_1p_http,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p_http,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p_http,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p_http,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p_http,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p_http,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p_http
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p_http,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p_http,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p_http,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p_http
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p_http,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p_http,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p_http,
bc09e492-a356-4bbf-8348-f4341710253d_1p_http,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p_http
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p_http,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p_http,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p_http,
bc09e492-a356-4bbf-8348-f4341710253d_1p_http,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p_http,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p_http,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p_http,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p_http,
395e7b8b-df3c-4084-892f-40149dabe66a_1p_http
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p_http,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p_http,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p_http,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p_http,
395e7b8b-df3c-4084-892f-40149dabe66a_1p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
e169150f-1970-4313-ba7c-f9e3e7399168_1p_http,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_1p_http,
9a33835f-89aa-4a21-aa03-f845f483db30_1p_http,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_1p_http,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_1p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p_http,
343f9215-b725-4478-af43-45ccd926c9f3_1p_http,
d5757c77-f295-419e-ba50-337fe77ef97d_1p_http,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p_http
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p_http,
343f9215-b725-4478-af43-45ccd926c9f3_1p_http,
d5757c77-f295-419e-ba50-337fe77ef97d_1p_http,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p_http
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_1p_js,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p_js,
994d2419-173b-460a-a9f4-be51e1d09e24_1p_js,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p_js,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_1p_js,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p_js,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p_js,
3996224d-92d9-481c-b598-83c2069eda20_1p_js,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p_js
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_1p_js,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p_js,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p_js,
3996224d-92d9-481c-b598-83c2069eda20_1p_js,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p_js,
c0c77c97-fc01-453c-b185-02641f868629_1p_js,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p_js,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p_js,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p_js
result, different session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p_js,
c0c77c97-fc01-453c-b185-02641f868629_1p_js,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p_js,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p_js,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p_js,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p_js,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p_js,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p_js
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p_js,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p_js,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p_js,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p_js
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p_js,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p_js,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p_js,
bc09e492-a356-4bbf-8348-f4341710253d_1p_js,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p_js
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p_js,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p_js,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p_js,
bc09e492-a356-4bbf-8348-f4341710253d_1p_js,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p_js,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p_js,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p_js,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p_js,
395e7b8b-df3c-4084-892f-40149dabe66a_1p_js
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p_js,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p_js,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p_js,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p_js,
395e7b8b-df3c-4084-892f-40149dabe66a_1p_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
e169150f-1970-4313-ba7c-f9e3e7399168_1p_js,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_1p_js,
9a33835f-89aa-4a21-aa03-f845f483db30_1p_js,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_1p_js,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_1p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p_js,
343f9215-b725-4478-af43-45ccd926c9f3_1p_js,
d5757c77-f295-419e-ba50-337fe77ef97d_1p_js,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p_js
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p_js,
343f9215-b725-4478-af43-45ccd926c9f3_1p_js,
d5757c77-f295-419e-ba50-337fe77ef97d_1p_js,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p_js
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. |
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_1p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p,
994d2419-173b-460a-a9f4-be51e1d09e24_1p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
result, different session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
e169150f-1970-4313-ba7c-f9e3e7399168_1p,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_1p,
9a33835f-89aa-4a21-aa03-f845f483db30_1p,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_1p,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_1p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. |
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_2101767568097288,
fake_010469195279952492,
fake_7747151092962796,
fake_4559299653448001,
fake_8554929215677225
result, different session:
fake_2101767568097288,
fake_010469195279952492,
fake_7747151092962796,
fake_4559299653448001,
fake_8554929215677225
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_36591557158766364,
fake_5049168440267364,
fake_01518076027575388,
fake_44399869272413306,
fake_6848665958582558
result, different session:
fake_36591557158766364,
fake_5049168440267364,
fake_01518076027575388,
fake_44399869272413306,
fake_6848665958582558
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_06005257546768217,
fake_33944716053221313,
fake_3844644338767671,
fake_9379721882532452,
fake_47227549849510075
result, different session:
fake_06005257546768217,
fake_33944716053221313,
fake_3844644338767671,
fake_9379721882532452,
fake_47227549849510075
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_4927332621182938,
fake_6108220570270531,
fake_4979167257315993,
fake_9606621747450765
result, different session:
fake_4927332621182938,
fake_6108220570270531,
fake_4979167257315993,
fake_9606621747450765
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_20592663573627634,
fake_39521729183865384,
fake_17997165107333646,
fake_7082180932732638,
fake_2352197795631037
result, different session:
fake_20592663573627634,
fake_39521729183865384,
fake_17997165107333646,
fake_7082180932732638,
fake_2352197795631037
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_8764323607754534,
fake_2744248645863503,
fake_04726604010560975,
fake_04377961356479476,
fake_8447387539557256
result, different session:
fake_8764323607754534,
fake_2744248645863503,
fake_04726604010560975,
fake_04377961356479476,
fake_8447387539557256
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_02685376259769079,
fake_9783744284582028,
fake_24887796537799822,
fake_9200230316194304,
fake_40629846189530294
result, different session:
fake_9767645221905326,
fake_7553056174315576,
fake_632842743319729,
fake_6534635895303373,
fake_08523360176416706
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_21453784232370166,
fake_6379178371298251,
fake_34400030083382216,
fake_7402600291244388
result, different session:
fake_21453784232370166,
fake_6379178371298251,
fake_34400030083382216,
fake_7402600291244388
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
favicon cache
A 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => key
read: async (key) => {
// Wait for the favicon to load (defined in supercookies.html)
await sleepMs(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 2, 2, 2, 2
result, different session: 2, 2, 2, 2
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
fetch cache
When 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. |
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
iframe cache
An 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
image cache
Caching 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
indexedDB
The 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 session:
370b423a-5521-4ddb-961e-88da63ce388d_1p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p,
994d2419-173b-460a-a9f4-be51e1d09e24_1p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p
result, different session:
370b423a-5521-4ddb-961e-88da63ce388d_1p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p,
994d2419-173b-460a-a9f4-be51e1d09e24_1p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p
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 session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
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 session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
result, different session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
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 session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (secret) => {
try {
return await IdbKeyVal.set('secret', secret);
} catch (e) {
throw new Error('Unsupported');
}
}
read: () => IdbKeyVal.get('secret')
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
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 session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
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 session:
e169150f-1970-4313-ba7c-f9e3e7399168_1p,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_1p,
9a33835f-89aa-4a21-aa03-f845f483db30_1p,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_1p,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_1p
result, different session: 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 session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
localStorage
The 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) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_1p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p,
994d2419-173b-460a-a9f4-be51e1d09e24_1p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p
result, different session:
370b423a-5521-4ddb-961e-88da63ce388d_1p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_1p,
994d2419-173b-460a-a9f4-be51e1d09e24_1p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_1p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_1p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_1p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_1p,
3996224d-92d9-481c-b598-83c2069eda20_1p,
6e172b89-c10d-4319-8fab-3ae69088df0e_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
result, different session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_1p,
c0c77c97-fc01-453c-b185-02641f868629_1p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_1p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_1p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_1p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_1p,
5aff633d-c958-4e07-b1c6-a66013b24b63_1p,
85d21032-10f8-47a4-9c42-ed6fac078de2_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_1p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_1p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_1p,
bc09e492-a356-4bbf-8348-f4341710253d_1p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_1p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_1p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_1p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_1p,
395e7b8b-df3c-4084-892f-40149dabe66a_1p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
e169150f-1970-4313-ba7c-f9e3e7399168_1p,
e53e4980-7b09-4fc1-aa42-e8377e1c51cf_1p,
9a33835f-89aa-4a21-aa03-f845f483db30_1p,
7b4c6de7-4afd-4dd0-8179-737bbece97c7_1p,
f33b17a5-1862-413b-8f22-1cc5923bcbe1_1p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_1p,
343f9215-b725-4478-af43-45ccd926c9f3_1p,
d5757c77-f295-419e-ba50-337fe77ef97d_1p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_1p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
prefetch cache
A <link rel='prefetch'...> 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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session:
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received
result, different session:
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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session:
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received
result, different session:
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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
script cache
Caching of scripts 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. |
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
Cross-session third-party tracking testsWhich browsers prevent third-party trackers from tracking you across browser sessions?
A common vulnerability of web browsers is that they allow third-party trackers to 'tag' your browser with some tracking data. This tag can be used to re-identify you when you return to a website you visited before. This category of leaks can be prevented by browser if they clean or isolate data between browser sessions. (In cases where a user has logged into a website or entered detailed information, it may be justifiable for a browser to retain information across sessions. These tests check when no such justification exists: when you have entered no significant information into a website, will the browser still retain data that allows you to be tracked across sessions?) |
||||||||
|
Alt-Svc
Alt-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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3, h3
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3, h3
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h2, h2, h2, h2, h2
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3
result, different session: h3, h3, h3, h3
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async () => {
// Clear Alt-Svc caching first.
let responseText = '';
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h2, h3, h3, h3
result, different session: h2, h2, h2, h2, h2
unsupported: false, true, false, false, false
passed: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3, h3
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h2, h2, h2, h2, h2
result, different session: 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 < 3; ++i) {
await fetch(altSvcOrigin + '/clear');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after clear:', responseText);
// Store "h3" state in Alt-Svc cache
for (let i = 0; i < 3; ++i) {
await fetch(altSvcOrigin + '/set');
await sleepMs(100);
}
responseText = await fetchText(altSvcOrigin + '/protocol');
console.log('after set:', responseText);
}
read: async () => {
const protocol = await fetchText(altSvcOrigin + '/protocol');
if ((new URL(window.location)).searchParams.get('thirdparty') === 'same') {
if (protocol !== 'h3') {
throw new Error('Unsupported');
}
}
return protocol;
}
result, same session: h3, h3, h3, h3
result, different session: h3, h3, h3, h3
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CacheStorage
The 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 {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_3p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p,
994d2419-173b-460a-a9f4-be51e1d09e24_3p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p
result, different session:
370b423a-5521-4ddb-961e-88da63ce388d_3p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p,
994d2419-173b-460a-a9f4-be51e1d09e24_3p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_3p,
c0c77c97-fc01-453c-b185-02641f868629_3p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_3p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_3p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_3p
result, different session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_3p,
c0c77c97-fc01-453c-b185-02641f868629_3p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_3p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_3p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.
result, different session:
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_3p_http,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p_http,
994d2419-173b-460a-a9f4-be51e1d09e24_3p_http,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p_http,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_3p_http,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p_http,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p_http,
3996224d-92d9-481c-b598-83c2069eda20_3p_http,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p_http
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_3p_http,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p_http,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p_http,
3996224d-92d9-481c-b598-83c2069eda20_3p_http,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p_http,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p_http,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p_http,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p_http
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p_http,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p_http,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p_http,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p_http
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p_http,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p_http,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p_http,
bc09e492-a356-4bbf-8348-f4341710253d_3p_http,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p_http
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p_http,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p_http,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p_http,
bc09e492-a356-4bbf-8348-f4341710253d_3p_http,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p_http,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p_http,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p_http,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p_http,
395e7b8b-df3c-4084-892f-40149dabe66a_3p_http
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p_http,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p_http,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p_http,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p_http,
395e7b8b-df3c-4084-892f-40149dabe66a_3p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p_http,
343f9215-b725-4478-af43-45ccd926c9f3_3p_http,
d5757c77-f295-419e-ba50-337fe77ef97d_3p_http,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p_http
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p_http,
343f9215-b725-4478-af43-45ccd926c9f3_3p_http,
d5757c77-f295-419e-ba50-337fe77ef97d_3p_http,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p_http
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_3p_js,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p_js,
994d2419-173b-460a-a9f4-be51e1d09e24_3p_js,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p_js,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_3p_js,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p_js,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p_js,
3996224d-92d9-481c-b598-83c2069eda20_3p_js,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p_js
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_3p_js,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p_js,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p_js,
3996224d-92d9-481c-b598-83c2069eda20_3p_js,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p_js,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p_js,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p_js,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p_js
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p_js,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p_js,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p_js,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p_js
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p_js,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p_js,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p_js,
bc09e492-a356-4bbf-8348-f4341710253d_3p_js,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p_js
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p_js,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p_js,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p_js,
bc09e492-a356-4bbf-8348-f4341710253d_3p_js,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p_js,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p_js,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p_js,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p_js,
395e7b8b-df3c-4084-892f-40149dabe66a_3p_js
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p_js,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p_js,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p_js,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p_js,
395e7b8b-df3c-4084-892f-40149dabe66a_3p_js
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p_js,
343f9215-b725-4478-af43-45ccd926c9f3_3p_js,
d5757c77-f295-419e-ba50-337fe77ef97d_3p_js,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p_js
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p_js,
343f9215-b725-4478-af43-45ccd926c9f3_3p_js,
d5757c77-f295-419e-ba50-337fe77ef97d_3p_js,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p_js
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CookieStore
The Cookie Store API is an alternative asynchronous API for managing cookies, supported by some browsers. |
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_3p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p,
994d2419-173b-460a-a9f4-be51e1d09e24_3p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: (data) => {
const msPerHour = 60 * 60 * 1000;
if (!window.cookieStore) {
throw new Error('Unsupported');
}
window.cookieStore.set({
name: 'partition_test',
value: data,
expires: Date.now() + msPerHour,
sameSite: 'none'
});
}
read: async () => {
if (!window.cookieStore) {
throw new Error('Unsupported');
}
const cookie = await window.cookieStore.get('partition_test');
if (!cookie) {
return null;
}
return cookie.value;
}
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
CSS cache
CSS stylesheets are cached, and if that cache is shared between websites, it can be used to track users across sites. |
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_7541777887815242,
fake_2133653672213729,
fake_23465428251878562,
fake_9918862576220238,
fake_03638948484369231
result, different session:
fake_7541777887815242,
fake_2133653672213729,
fake_23465428251878562,
fake_9918862576220238,
fake_03638948484369231
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_5184599732409432,
fake_6634381663966933,
fake_71245111411403,
fake_012756870797679953,
fake_5634176160758608
result, different session:
fake_5184599732409432,
fake_6634381663966933,
fake_71245111411403,
fake_012756870797679953,
fake_5634176160758608
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_07464648603509882,
fake_5210287645079827,
fake_870292034079226,
fake_9369291625337763,
fake_11470212582217432
result, different session:
fake_07464648603509882,
fake_5210287645079827,
fake_870292034079226,
fake_9369291625337763,
fake_11470212582217432
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_3440000834438155,
fake_4079190509451829,
fake_22391866206797983,
fake_06245867297798369
result, different session:
fake_3440000834438155,
fake_4079190509451829,
fake_22391866206797983,
fake_06245867297798369
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_31093562286427523,
fake_923033762868708,
fake_8019462153901069,
fake_3363283874727836,
fake_342887608689024
result, different session:
fake_31093562286427523,
fake_923033762868708,
fake_8019462153901069,
fake_3363283874727836,
fake_342887608689024
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_20936137056558057,
fake_5119613816263968,
fake_274051768567092,
fake_9589324433517248,
fake_15847946917604983
result, different session:
fake_20936137056558057,
fake_5119613816263968,
fake_274051768567092,
fake_9589324433517248,
fake_15847946917604983
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_3381766365129011,
fake_25545545894389954,
fake_9889080085347677,
fake_33048844572195035,
fake_6527715796509941
result, different session:
fake_4242369604052638,
fake_42281919194625495,
fake_6013996888999564,
fake_8509188113849964,
fake_11805722916276506
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return key;
}
read: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_8104519853919616,
fake_22518321881918957,
fake_8298758985756283,
fake_8405143276744587
result, different session:
fake_8104519853919616,
fake_22518321881918957,
fake_8298758985756283,
fake_8405143276744587
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
favicon cache
A 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => key
read: async (key) => {
// Wait for the favicon to load (defined in supercookies.html)
await sleepMs(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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(2000);
const response = await fetch(
testURI('ctr', 'favicon', key), { cache: 'reload' });
const count = (await response.text()).trim();
if (count === '0') {
throw new Error('No requests received');
}
return count;
}
result, same session: 2, 2, 2, 2
result, different session: 2, 2, 2, 2
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
fetch cache
When 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
return key;
}
read: async (key) => {
await fetch(testURI('resource', 'fetch', key),
{ cache: 'force-cache' });
const countResponse = await fetch(testURI('ctr', 'fetch', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
font cache
Web fonts are sometimes stored in their own cache, which is vulnerable to being abused for cross-site tracking. |
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } body { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
return key;
}
read: async (key) => {
const text = document.createElement('span');
text.id = 'text';
text.innerText = 'test';
document.body.appendChild(text);
const originalWidth = text.getBoundingClientRect().width;
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
iframe cache
An 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.addEventListener('load', () => resolve(key), { once: true });
iframe.src = testURI('resource', 'page', key);
})
read: async (key) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const iframeLoadPromise = new Promise((resolve, reject) => {
iframe.addEventListener('load', resolve, { once: true });
});
const address = testURI('resource', 'page', key);
iframe.src = address;
await iframeLoadPromise;
const response = await fetch(
testURI('ctr', 'page', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
image cache
Caching 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const img = document.createElement('img');
document.body.appendChild(img);
img.addEventListener('load', () => resolve(key), { once: true });
img.src = testURI('resource', 'image', key);
})
read: async (key) => {
const img = document.createElement('img');
document.body.appendChild(img);
const imgLoadPromise = new Promise((resolve, reject) => {
img.addEventListener('load', resolve, { once: true });
});
img.src = testURI('resource', 'image', key);
await imgLoadPromise;
const response = await fetch(
testURI('ctr', 'image', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
indexedDB
The 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 session:
370b423a-5521-4ddb-961e-88da63ce388d_3p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p,
994d2419-173b-460a-a9f4-be51e1d09e24_3p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p
result, different session:
370b423a-5521-4ddb-961e-88da63ce388d_3p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p,
994d2419-173b-460a-a9f4-be51e1d09e24_3p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p
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 session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
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 session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_3p,
c0c77c97-fc01-453c-b185-02641f868629_3p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_3p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_3p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_3p
result, different session: 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 session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (secret) => {
try {
return await IdbKeyVal.set('secret', secret);
} catch (e) {
throw new Error('Unsupported');
}
}
read: () => IdbKeyVal.get('secret')
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
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 session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
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 session:
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure
result, different session:
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure,
Error: IDBFactory.open: The operation is insecure
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 session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
localStorage
The 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) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
370b423a-5521-4ddb-961e-88da63ce388d_3p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p,
994d2419-173b-460a-a9f4-be51e1d09e24_3p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p
result, different session:
370b423a-5521-4ddb-961e-88da63ce388d_3p,
c936bc15-7e11-4a4c-aa12-eb0640b8271d_3p,
994d2419-173b-460a-a9f4-be51e1d09e24_3p,
1d3a1e7a-a6b6-4292-ab45-69ce2eaffb53_3p,
dd6f8907-8cc4-4f98-a7bd-520032e39d6f_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
result, different session:
e6fc4d89-340d-4858-a365-01abe9733560_3p,
414b79e4-fb0b-4e57-9e87-08ee47e1b7c1_3p,
804e82ab-6930-494e-abd0-c2fe80b9c4de_3p,
3996224d-92d9-481c-b598-83c2069eda20_3p,
6e172b89-c10d-4319-8fab-3ae69088df0e_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
3fd6a23c-7d8e-4d3c-8bfb-3f08ccf05d26_3p,
c0c77c97-fc01-453c-b185-02641f868629_3p,
7caab837-d4ff-4bc0-9ffe-ab2224360259_3p,
fc962a88-f7a7-4350-8f97-f81f02a3ede5_3p,
aec43521-3bbf-42e5-b48e-d13a84fb4fc8_3p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
result, different session:
0f3d1812-d60f-4484-94c1-b4737eb5883e_3p,
4b7957d7-c5c7-440d-b99f-d66c3b91320b_3p,
5aff633d-c958-4e07-b1c6-a66013b24b63_3p,
85d21032-10f8-47a4-9c42-ed6fac078de2_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
result, different session:
c49e67d9-a3fb-4950-b06e-4193284860c3_3p,
ea331b81-c39f-48cb-bc43-ef77e69378a9_3p,
7d5ff3d2-e28e-43fb-82ae-142e00b513c2_3p,
bc09e492-a356-4bbf-8348-f4341710253d_3p,
472ff9ed-519c-43b8-8fd6-1eec9ba5d825_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
result, different session:
1e925902-0365-4f6e-90fb-4031e200ee0a_3p,
0c6bdc4e-821d-4d65-bc0d-3aed3705ecd0_3p,
25de9ab1-3320-4ad8-8c53-1faf4329fad3_3p,
7aa4df6a-6d3e-454b-a8e4-42383590895a_3p,
395e7b8b-df3c-4084-892f-40149dabe66a_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
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 session:
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: (secret) => { window.localStorage.setItem('secret', secret); }
read: () => window.localStorage.getItem('secret')
result, same session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
result, different session:
aba7dba8-0f5d-46f8-ab7b-18d316fb3b36_3p,
343f9215-b725-4478-af43-45ccd926c9f3_3p,
d5757c77-f295-419e-ba50-337fe77ef97d_3p,
fbe3546a-e1cf-47af-96b8-dde0378a8be9_3p
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
prefetch cache
A <link rel='prefetch'...> 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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session:
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received
result, different session:
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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session:
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received,
Error: No requests received
result, different session:
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) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
return key;
}
read: async (key) => {
const link = document.createElement('link');
link.rel = 'prefetch';
link.href = testURI('resource', 'prefetch', key);
document.getElementsByTagName('head')[0].appendChild(link);
await sleepMs(500);
const response = await fetch(
testURI('ctr', 'prefetch', key), { cache: 'reload' });
const countString = (await response.text()).trim();
if (parseInt(countString) === 0) {
throw new Error('No requests received');
}
return countString;
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
script cache
Caching of scripts 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: (key) => new Promise((resolve, reject) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 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) => {
const script = document.createElement('script');
document.body.appendChild(script);
script.addEventListener('load', () => resolve(key), { once: true });
script.src = testURI('resource', 'script', key);
})
read: async (key) => {
const script = document.createElement('script');
document.body.appendChild(script);
const scriptLoadPromise = new Promise((resolve, reject) => {
script.addEventListener('load', resolve, { once: true });
});
script.src = testURI('resource', 'script', key);
await scriptLoadPromise;
const response = await fetch(
testURI('ctr', 'script', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
XMLHttpRequest cache
Similar to the newer Fetch API, any resource received may be cached by the browser. The cache is potentially vulnerable to cross-site tracking attack. |
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 1, 1, 1, 1, 1
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
return key;
}
read: async (key) => {
const req = new window.XMLHttpRequest();
const loadPromise = new Promise(resolve => req.addEventListener('load', resolve));
req.open('GET', testURI('resource', 'xhr', key));
req.send();
await loadPromise;
const countResponse = await fetch(testURI('ctr', 'xhr', key),
{ cache: 'reload' });
return (await countResponse.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 1, 1, 1, 1
unsupported: false, false, false, false
passed: false, false, false, false
test failed: false, false, false, false
|
|
DNS privacy testsWhich browsers keep their DNS queries encrypted?
The Domain Name System (DNS) is the method by which web browsers look up the IP address for each website you visit. In a DNS query, a web browser will ask a DNS resolver (somewhere on the internet) for the IP address corresponding to a domain name (such as nytimes.com) for a website you want to visit. Traditionally, most web browsers have sent their DNS queries unencrypted, which means your ISP or anyone else on the network between your computer and the DNS resolver can eavesdrop on the websites you visit. In recent years, web browsers and operating systems have begun to introduce encrypted DNS, including the DNS over HTTPS (DoH) protocol, to encrypt the DNS request from your browser and the response from the resolver to keep your browsing history from leaking. These tests check whether a browser is still protecting its DNS requests by sending them encrypted. |
||||||||
|
Location: Brazil
Checks whether the browser decides to use encrypted DNS if the computer is located in Brazil. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
Location: China
Checks whether the browser decides to use encrypted DNS if the computer is located in China. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
Location: Germany
Checks whether the browser decides to use encrypted DNS if the computer is located in Germany. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
Location: India
Checks whether the browser decides to use encrypted DNS if the computer is located in India. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
Location: Nigeria
Checks whether the browser decides to use encrypted DNS if the computer is located in Nigeria. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
Location: Russia
Checks whether the browser decides to use encrypted DNS if the computer is located in Russia. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
Location: United States
Checks whether the browser decides to use encrypted DNS if the computer is located in United States. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
OS DNS: Cloudflare
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Cloudflare. |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true leak detected: false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true leak detected: false, false, false, false |
|
OS DNS: Comodo
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Comodo. |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false leak detected: true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
|
OS DNS: Google
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Google. |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true leak detected: false, false, false, false |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: true, true, true, true leak detected: false, false, false, false |
|
OS DNS: Quad9
Checks whether the browser decides to use encrypted DNS if the operating system's default DNS provider is Quad9. |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false, false leak detected: true, true, true, true, true |
passed: true, true, true, true, true leak detected: false, false, false, false, false |
passed: false, false, false, false leak detected: true, true, true, true |