Nightly private modes(default settings) |
brave 1.96 private |
brave 1.96 Tor |
chrome 154.0 private |
duckduckgo 1.205 private |
edge 154.0 private |
firefox 157.0a1 private |
opera 136.0 private |
tor 16.0a10 |
vivaldi 8.2 private |
|---|---|---|---|---|---|---|---|---|---|
|
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:
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:
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, 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
|
|
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=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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=${secret}`);
const result = await response.json();
const blobUrl = decodeURIComponent(result.blobUrl);
const blobResponse = await fetch(blobUrl);
return blobResponse.text();
}
result, same first party:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
result, different first party:
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch,
Error: Failed to fetch
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
try {
const blobURL = URL.createObjectURL(new Blob([secret]));
fetch(`${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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
result, different first party:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
result, different first party:
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url'),
Error: undefined is not an object (evaluating 'cacheKeys[0].url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
result, different first party:
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same first party:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
result, different first party:
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
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
|
|
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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
24049fa1-0463-4c51-8a59-425d51e216a0_http,
14b267e4-e7ce-47e9-8e92-c7af8487b412_http,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_http,
77313917-effd-414b-b300-9ad1622579f4_http,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_http
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_http,
d3d3ae69-51f7-4893-98e5-8168b62664d7_http,
8ac18e95-eb80-4336-b17c-267774b35d7b_http,
59e18080-6af0-4df6-b5d2-4a085cb70078_http,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_http,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_http,
43613891-a198-46c4-b0e6-0fb356dc4264_http,
590ce123-8283-4831-996c-31e3d54d3f2b_http
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_http,
da9c2ff3-5817-44da-bf9c-efe65d13703c_http,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_http,
2087b362-5137-4548-a6bc-105e72649562_http,
c0bbf07f-e638-489e-b781-1b025401181d_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_http,
5c041f67-aa1b-4182-b344-cc1af4fcf448_http,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_http,
126487c9-a41b-4995-aad6-d7f844019e4c_http
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_http,
b2102ec9-f10f-46c3-b941-bdfa64802693_http,
ba446b46-42b9-4bfa-97c2-febb74687487_http,
e36681ab-796e-44a9-be0f-9b2da0b03789_http,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
1099b73a-b1bd-4b18-864c-a9018f08b560_http,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_http,
afa1983c-2208-4632-93e3-1472a55cf1a1_http,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_http,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_http
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_http,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_http,
3af43793-bb16-479f-9eea-041e03f1a435_http,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_http,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same first party:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_http,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_http,
8097a053-7884-43e0-8ab5-40a68874524d_http,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_http,
caf658e6-1fe1-414b-819e-a7c9e1012af5_http
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
24049fa1-0463-4c51-8a59-425d51e216a0_js,
14b267e4-e7ce-47e9-8e92-c7af8487b412_js,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_js,
77313917-effd-414b-b300-9ad1622579f4_js,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_js,
d3d3ae69-51f7-4893-98e5-8168b62664d7_js,
8ac18e95-eb80-4336-b17c-267774b35d7b_js,
59e18080-6af0-4df6-b5d2-4a085cb70078_js,
95f8509d-aedd-46d0-8638-bc0f04bae62f_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_js,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_js,
43613891-a198-46c4-b0e6-0fb356dc4264_js,
590ce123-8283-4831-996c-31e3d54d3f2b_js
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_js,
da9c2ff3-5817-44da-bf9c-efe65d13703c_js,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_js,
2087b362-5137-4548-a6bc-105e72649562_js,
c0bbf07f-e638-489e-b781-1b025401181d_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_js,
5c041f67-aa1b-4182-b344-cc1af4fcf448_js,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_js,
126487c9-a41b-4995-aad6-d7f844019e4c_js
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_js,
b2102ec9-f10f-46c3-b941-bdfa64802693_js,
ba446b46-42b9-4bfa-97c2-febb74687487_js,
e36681ab-796e-44a9-be0f-9b2da0b03789_js,
55f75f72-9fba-4b05-9306-0ac7b698aa57_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
1099b73a-b1bd-4b18-864c-a9018f08b560_js,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_js,
afa1983c-2208-4632-93e3-1472a55cf1a1_js,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_js,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_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=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_js,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_js,
3af43793-bb16-479f-9eea-041e03f1a435_js,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_js,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same first party:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_js,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_js,
8097a053-7884-43e0-8ab5-40a68874524d_js,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_js,
caf658e6-1fe1-414b-819e-a7c9e1012af5_js
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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_13980166700860774,
fake_8423277946702594,
fake_8912958897242895,
fake_6950842386574896,
fake_060907952225984996
result, different first party:
fake_33624913070346873,
fake_880213172897226,
fake_08394901252449061,
fake_5549145123992065,
fake_4588957525369364
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_4096301909629976,
fake_04723454704166463,
fake_7236524444747217,
fake_7806538351849517,
fake_8163938008799068
result, different first party:
fake_2933354052767727,
fake_08890401326891828,
fake_2660079842567491,
fake_71730758726705,
fake_9011257884218422
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_16510564093009772,
fake_479026732279493,
fake_48321639693541174,
fake_511392336436602
result, different first party:
fake_16510564093009772,
fake_479026732279493,
fake_48321639693541174,
fake_511392336436602
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_10539985171896249,
fake_5756879301283353,
fake_8473139868243056,
fake_4416748411041347,
fake_6234429534869699
result, different first party:
fake_257283593112801,
fake_5025617238778439,
fake_8891014494548679,
fake_10090857046820978,
fake_3916977520457381
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_32268579755516535,
fake_9015753069290382,
fake_02591157272740996,
fake_3116177469510326
result, different first party:
fake_32268579755516535,
fake_9015753069290382,
fake_02591157272740996,
fake_3116177469510326
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_8012985403216439,
fake_7004903686581889,
fake_4923713734259916,
fake_6636744413814881,
fake_7125968019165414
result, different first party:
fake_6567378359856877,
fake_15214829987791245,
fake_10385925252581174,
fake_3187231096533327,
fake_25682749590560294
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_8804537825058254,
fake_15346931008890063,
fake_2919592700890723,
fake_1339106508151353,
fake_12211594824539462
result, different first party:
fake_8804537825058254,
fake_15346931008890063,
fake_2663344239405021,
fake_1339106508151353,
fake_12211594824539462
unsupported: false, false, false, false, false
passed: false, false, true, 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_1879398736070479,
fake_7692321910553299,
fake_6840857297546881,
fake_32552046248807764,
fake_3792339452324447
result, different first party:
fake_4719150209145111,
fake_5489610264879152,
fake_23965583083239062,
fake_7221799155684316,
fake_11140712806168951
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_2924180716403375,
fake_3128564928265236,
fake_8022437955852411,
fake_006967758051857453,
fake_3357920003943733
result, different first party:
fake_2924180716403375,
fake_3128564928265236,
fake_8022437955852411,
fake_006967758051857453,
fake_3357920003943733
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, 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
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: 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, 2
result, different first party: 3, 3, 3, 3, 3
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
fetch 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
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
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, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
font 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: 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
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, 2, 1, 1
unsupported: false, false, false, false, false
passed: false, false, true, 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, 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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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:
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
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
|
|
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
result, different first party: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h1.privacytests2.org:8901/?mode=write&secret=${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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h1.privacytests2.org:8901/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
H2 connection
HTTP/2 is a web connection protocol introduced in 2015. Some browsers re-use HTTP/2 connections across websites and can thus be used to track users. |
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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=${secret}`, { cache: 'no-store' });
}
read: async () => {
const response = await fetch('https://h2.privacytests2.org:8902/?mode=read', { cache: 'no-store' });
return await response.text();
}
result, same first party:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
await fetch(`https://h2.privacytests2.org:8902/?mode=write&secret=${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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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:
3cddd50c151a04e33ce9692f13a5306f,
3a5306ba1c1c0afa651b957df10a2236,
9c4d4d87e407d68da314862748c3959d,
5681b8607987c712cc9fc988dd2e38bf,
fd456525ff7b209af6c5bec6d6759487
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:
0ee5ea54b7a616d928f9cc46e0913bd2,
7fda2925e0f1f5b5ce5b4377c74c6f66,
ccc9d0dbba5f0ff3df3269ed3e59ab1e,
089bd8ef1df4956b786dff2ae5a345b5
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: , , , ,
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:
fb123530003e297bfb2aeb4b77d38cc9,
882e08bb6fa9895cfc0cfc88baa2ea2b,
43f709faacce3121d90c2722c90a2bf1,
8ad5072d6347dc3184dda9b8ae350f10
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:
bf85824cd3e93421ad3500b475c62ba8,
79faecdee8eb44adf04e260cd2d517b4,
c1c5762ba5b8d3ebec40360a5eb46712,
11bb354e53da3cc0dfd459a6c5408385,
e60208ff4764d818f5af9f4e23b0bd22
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:
9cb28adc2e263f1444bb477d82aeeaec,
7cc7aa731d82467fdc777243a29175d9,
af81a231af8284cfc9bd71c2fef80098,
0e004be7c7175cf7e4a5cfd257f4564e,
3858dd0a17ee63018bff2f11c47651c2
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:
d0e783fb0b74ba0ee4d5636ff206f4f2,
266b7d3bdae14790f06a1e8b1416b778,
792755e8fe2dcb61e3a894d8bc53aae0,
cd00190f75c86373ebcca57301f9425d,
f4ca8939e4d100cd5427158f93b10b9e
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
HSTS cache
|
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: 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: 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 unsupported: , , , passed: true, true, true, true test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: 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 unsupported: , , , passed: true, true, true, true test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false |
write: 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: 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 |
|
HSTS cache (fetch)
|
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: 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: 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 unsupported: , , , passed: true, true, true, true test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https, Upgraded to https unsupported: false, false, false, false, false passed: false, false, false, false, false test failed: false, false, false, false, false |
write: 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 unsupported: , , , passed: true, true, true, true test failed: false, false, false, false |
write: set HSTS flag read: read HSTS flag result, same first party: not tested, not tested, not tested, not tested, not tested result, different first party: Used http, Used http, Used http, Used http, Used http unsupported: false, false, false, false, false passed: true, true, true, true, true test failed: false, false, false, false, false |
write: null read: null result, same first party: , , , , result, different first party: HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected, HTTPS used by default; no HSTS cache issue expected unsupported: , , , , passed: true, true, true, true, true test failed: false, false, false, false, false |
write: 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: 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 |
|
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
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
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, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
image 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: 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
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, 2, 1, 1
unsupported: false, false, false, false, false
passed: false, false, true, 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, 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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
result, different first party: undefined
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
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
|
|
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: 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
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 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, 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 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, 2, 1, 1
unsupported: false, false, false, false, false
passed: false, false, true, 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 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, 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
|
|
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: 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
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, 2, 1, 1
unsupported: false, false, false, false, false
passed: false, false, true, 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, 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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
result, different first party:
Error: no SharedWorker message received,
Error: no SharedWorker message received,
Error: no SharedWorker message received,
Error: no SharedWorker message received,
Error: no SharedWorker message received
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
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
|
|
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:
dc2aeed0db643e25d769d0eeb586511e2eabc718e127533b773bc761c35a96d1,
50c0ffa06844aad9ff986b7d66ded51aef6d789a80686299dd1a20a24e8f2c63,
1353819c43208fbb2667ed9b330ec0f4b7a8cc7aeacae565750e03ddca2a0a7f,
f2e3015a25e85bd7458db1d53802648909ad06db05b22d379e8c796092493fbd,
784765d2ee94ff41ba01f1cfb72113ac5abb0ea6e5251633991a9e7d1e05bd89
result, different first party:
082495f2784cd810430a046487a867e2abfa68d06d96116bbcdb4fb0d09fc46b,
c4b83d0f1c1138d1e84cc4ce1ee023f43eb7b728e3c1c725a7c3aee6e6ad1551,
8bd0f0139bbd3a2eca41ded6de15cbeed06205bc1b2b3d87c327961007367b58,
67b7df5de5690752e7e1927673606de408877411b026d0ee4eb8baaf201f07be,
b83a5b20c5a0670e2b6932f168648b244fd9ed035bc24c6f793090032df271af
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:
d75839b0d6b125ea561a2ce3a1ed9ae83286d27fef0b335bbdc76ce468e5a3c0,
102dd2890b1792c330886826ccbaff2c6907989b91579139a2526a226b76ceb6,
474be482d827cb71c07c52aaf22189ad3fcd421ac6871d33426cb328b13551b4,
1fce813f959bd462bab244dbc13706d25912e8fe6edaa812d00766432ce57c92,
be48a6cb316c9f4a187573b56bb84b7f1a5a6a860c08fb7cfc7bcecc9f4f9cf3
result, different first party:
4e965e7b23b1137d2c706c62b94ddb59c9f56f0f7ca5bb52b471864e1cc802dc,
f28afe98df48376e145f6db783dad4aa3cd08bd93b1c1f7f7b984fa4442364ee,
fe28694a52ca627fbf56f2be16d232e880dccdf18e0f063af2a6d5d792503697,
058593537dd4ad8aa6e44daae75dacf0d9d21013a3eb82c189c1dee392276e22,
25e36b016b4c2823c72c0cd2f4104e51dfc350ed39f76d6dc9c4936548ccdc19
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:
ed00fcd8245f42cca19604a3065e34eb021c96c1cf1609107c00a6738509b5b1,
305184886e8500be9be74fe47d571ccb852105f9da6fba8c69bbf0bf9dd0ce74,
9518e8375d6708f6e1fc16b2f8f6d3a43a37736e46e55f03dda57150814f5cc3,
28a56a5844e5c5b833a21b93e23600219cd2af4e5597f0f3e313b6cd1b525a52
result, different first party:
c71a695e78989268777539e03f487a6580e9f0b43864fdd55bf59f4d7e9aa796,
2db221d1a6fa11c089b1c5c5e1fa32678d51b15c31a454f9cddea1f2049522a2,
89c3f597e182f914fd73cb4cb6e4acbf81680d74eeb26dd624af7dd9196ff516,
2fb61485a0dc195d7f1d53f5059bd787de4f8f8ebc50c9f980bf6e31cfdbe951
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:
0fac09956f1d8d249a4fe94d7a7118318350da004567231f573c93faa5ac4521,
51e63b96cbf017a93ac7b6a0beb9f0687438fa695158ab29fbe29ee5df30f616,
f307e34ebf20a1f777d1d308043f81e4983a4734c228d2c3210438925669a368,
98898c8137e35894ddb2a838525011b1d6d625520f23824c354915c50ecc16ed,
64da66304f82e22fd1956b15da55dbe1b1e10125cb5cb6a994ebb792435d1993
result, different first party:
72903bb2ef4f3b3d0b4dec6cce75ebbb003809cd665435aa48800f8c1ea000e8,
8c41448709bde26f3edb02b236423446bc3ae248ad4297fb1143c182f47a03bd,
8e225011e2f919c90212f54e6727538b68aece82c98fd8b72c44338d36e40e36,
c1a09482683da2290222ac752d317af9763753b0ae22008fe66b9c7c8096019c,
235d397f33584e91e20d75b24ac8da8fc9e65383cf97c364826c4ce914c694ab
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:
25d1f977c9c49573779aa4a5f45ee274e7582d073d089ce3bef71bcf8ef2599e,
8886c06515b62e90125f60904e135f4932e171b07e00ae9d3185ec6ee760a1d5,
7a1d8f29734b1c1d204c92de65eb97163b93b2916e3b9ebc1f603fa42d193b5d,
a0f282891bf450af10fdc4a0dee6c4725675c432f2c002819e2f3c4d6bbed2ad
result, different first party:
8b3cc6bf4cc8d6688b580d49c921128a04beef5fbb78c5d76a70bbfbf1c11fb5,
ae98273ff60bfe7685ac57196197352bc817f4a66f49c476519916598951c713,
c5272c2a68c969b036b71f463c9065ed60d1d9bee9a55c6114a82475b78e29bb,
5ec505e7cc4213a837935241e29cae5f79b4553349262a8df165a5813a55add4
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:
73f5acb236a9c56ab33b2b6abd8e499e51816e08added14bc4178547121cb850,
5150f7982abe3f3ff7b561076df65155c938758cfc6fee69e4eab6d315e65a8c,
8a9a7436f102882ea76c2a7e0cd9dee71ea6e99648e506b1081b0842b8273b54,
ce1ca0d9669e56b0ed8a29a6f4e71766449da102e84c7bbc5b8c0bc99e2be509,
8a08fc37bd643da075168bd53ef2ebd55532fbf1bfd925fb7e6f1f0eb73d23e1
result, different first party:
579e1fb6c209bcea3c8e4be2dcb7ad7007fffcb9115db1b7ef62ab990e881536,
f1bb330f73c635747eb0da3924e1d7ff402c835abf708ecfa82f745851d00ecf,
8c2c0a0792f42b8f247bf2588358013861beecc91c711de897f06bd0116c6fe8,
b6adc4891465bf6041adb1f07f11565cec3af8017cfd0f0a56d414ab17bf2ab4,
5d647787dec6f109ebd0c68643482540f273637a14107a2b594254fce0dc71f2
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:
e535f06894a06e0f21548ef11759cabd9ccf4eedb72e3ca90c5abfcb5a78a5d2,
23d9157e13793b10979e2f54dbf586ebe2e4311fc3f76e0f4c330ba2a21c2911,
cc6cba13fcc9336bb7ebdf31a4775cc5297bd8cdad6794c575e678da46a6f786,
4acbbab81d398911bef842b8af2e5ebfac2137543e583f395e0c1584b68e2ede,
6a1515dcf1c087b976e2e110211bf2319a1e76683ef28cc10d587ece3ef886fb
result, different first party:
74b401559f5946893e61dfc2902fc827f512faa44139fcedc5baadc24180a0ac,
b3fdaaa7d1f3db15e06345aa6acfc01a8284e50e8a5f2598475f727a82d9ec84,
bce5f9db13ad5aee3370ac33947d69307573ed8be76d448f5e5d1fa7001b917e,
754c511d72ff7d22ce9e65b9e7d6909a70a06b371f67a104b9c33326909eeb7a,
9b7b7c2201e871b98b2f79d99378768aaa26ca23851b19a39c42bfb7ddcdda6b
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:
2aa6acec24d79b8cd9769048fd28c85d0757c2ddfb49ead176a278f3acccbd4b,
b67000b3f1c8a79ce39735ac12bff3984eaeb1dc9bccf16b7858de48c6a0d570,
e85d7196ea627d92b5ea5225be88858b19d9dc40e883cfdc3a991cd828afa536,
623095df1c3bbbde4577d98408e60d967814f9c2adc36e577890efc2989e855f,
7309863977855fb05ed55ddd79fe7084d2bc0728aa89c387d879abc7fd896e93
result, different first party:
d68344f96244c2cf4ba4160940acdacc5ff9ec73f88778e5dd674f16d84df2eb,
89069511b41e3dd87b478b393270e3ba7373c829812fad22948834479005f593,
4e5aa63ef78806f629cd4321d2841e86622af60d8290effb4944d67bab9f84b4,
9452b3ebeefd1f7033df05b5a9ced47665846b982580e455b43d94d31d236335,
839a098e1d05f1e6d6a999cafbb750aa41def62de3d365d8def34326c175d5a3
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:
9e431f9a55e6e139decbb8d3f983d82ecca4bf96d7db282447168d11e22a9b36,
bb7a0062af5fb957068c3c80a7304e1a9f5a7c932bb08c775b97245d4be6d04f,
223c9b1e6eb14335ec0077944fdaac54d2c1ed3bea6d4a152313766c78a9124f,
de68a087bf26c451f2eb3d14d386d26a730685e7f4166241f7b603785d924e4f,
1a86b7e85fcc993d4185e72d8cda2405d3dea125252efc54e484072c05b8709b
result, different first party:
9b2d8a60f8695f862d8434640ab60e92425f2d7d74a9ac30d29bbd331dc896df,
f7e9fdbbc90fe975ceade54dfbfad3c5c77203d91a1a1216287be09f7339205d,
0ac798f21299dbf6412904c74df8c1132cf859d6f81ecabcda84e5431a8a0e2b,
8bc18064fd76f5938e44e5d2ca90e73af89c02edfa0e4beeb16f43c4f3e7be66,
84ab1b2420f429a2f0e06238e416e0faf2a06846db3eb1cfdfa4d75ae203b785
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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
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
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, 1
result, different first party: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
Navigation 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/
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/
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/,
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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0,
14b267e4-e7ce-47e9-8e92-c7af8487b412,
f83e2b50-5225-4b57-9b61-235f63b8dfe5,
77313917-effd-414b-b300-9ad1622579f4,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6,
d3d3ae69-51f7-4893-98e5-8168b62664d7,
8ac18e95-eb80-4336-b17c-267774b35d7b,
59e18080-6af0-4df6-b5d2-4a085cb70078,
95f8509d-aedd-46d0-8638-bc0f04bae62f
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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
43613891-a198-46c4-b0e6-0fb356dc4264,
590ce123-8283-4831-996c-31e3d54d3f2b
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0,
da9c2ff3-5817-44da-bf9c-efe65d13703c,
235abae5-d3ed-4a57-b4c8-bc7a2838b061,
2087b362-5137-4548-a6bc-105e72649562,
c0bbf07f-e638-489e-b781-1b025401181d
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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4,
5c041f67-aa1b-4182-b344-cc1af4fcf448,
2d1e2109-c1e7-41bc-bb38-40738285d4e3,
126487c9-a41b-4995-aad6-d7f844019e4c
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e,
b2102ec9-f10f-46c3-b941-bdfa64802693,
ba446b46-42b9-4bfa-97c2-febb74687487,
e36681ab-796e-44a9-be0f-9b2da0b03789,
55f75f72-9fba-4b05-9306-0ac7b698aa57
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:
1099b73a-b1bd-4b18-864c-a9018f08b560,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
afa1983c-2208-4632-93e3-1472a55cf1a1,
c137f4ae-dfc9-46bb-b60c-8149f7089d85,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
3af43793-bb16-479f-9eea-041e03f1a435,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
ce0cc8eb-fb55-4337-a2ea-70054084cca7
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
8097a053-7884-43e0-8ab5-40a68874524d,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
caf658e6-1fe1-414b-819e-a7c9e1012af5
result, different first party: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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_24049fa1-0463-4c51-8a59-425d51e216a0,
name_14b267e4-e7ce-47e9-8e92-c7af8487b412,
name_f83e2b50-5225-4b57-9b61-235f63b8dfe5,
name_77313917-effd-414b-b300-9ad1622579f4,
name_ab49c33b-d8a2-47bf-b59a-1bc95dc49db6
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_14fc38c7-1632-47ef-aed9-68c140a6c1f6,
name_d3d3ae69-51f7-4893-98e5-8168b62664d7,
name_8ac18e95-eb80-4336-b17c-267774b35d7b,
name_59e18080-6af0-4df6-b5d2-4a085cb70078,
name_95f8509d-aedd-46d0-8638-bc0f04bae62f
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_8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
name_9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
name_43613891-a198-46c4-b0e6-0fb356dc4264,
name_590ce123-8283-4831-996c-31e3d54d3f2b
result, different first party:
name_8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9,
name_9b31b1a1-2f1d-4e7f-8ea4-8ae659981737,
name_43613891-a198-46c4-b0e6-0fb356dc4264,
name_590ce123-8283-4831-996c-31e3d54d3f2b
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_75fc4c44-97d4-41ae-8c7a-4716038b93f0,
name_da9c2ff3-5817-44da-bf9c-efe65d13703c,
name_235abae5-d3ed-4a57-b4c8-bc7a2838b061,
name_2087b362-5137-4548-a6bc-105e72649562,
name_c0bbf07f-e638-489e-b781-1b025401181d
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_98d7588a-3b9c-4a98-9150-18e68fb68ef4,
name_5c041f67-aa1b-4182-b344-cc1af4fcf448,
name_2d1e2109-c1e7-41bc-bb38-40738285d4e3,
name_126487c9-a41b-4995-aad6-d7f844019e4c
result, different first party:
name_98d7588a-3b9c-4a98-9150-18e68fb68ef4,
name_5c041f67-aa1b-4182-b344-cc1af4fcf448,
name_2d1e2109-c1e7-41bc-bb38-40738285d4e3,
name_126487c9-a41b-4995-aad6-d7f844019e4c
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_ebac3097-9ad0-4d81-90c3-a92d22d9168e,
name_b2102ec9-f10f-46c3-b941-bdfa64802693,
name_ba446b46-42b9-4bfa-97c2-febb74687487,
name_e36681ab-796e-44a9-be0f-9b2da0b03789,
name_55f75f72-9fba-4b05-9306-0ac7b698aa57
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_1099b73a-b1bd-4b18-864c-a9018f08b560,
name_7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
name_afa1983c-2208-4632-93e3-1472a55cf1a1,
name_c137f4ae-dfc9-46bb-b60c-8149f7089d85,
name_de2bb8a5-1a55-4a6c-804f-8cdd66e07035
result, different first party:
name_1099b73a-b1bd-4b18-864c-a9018f08b560,
name_7dbf130d-dbc6-4a2a-b4fd-479ca32a3585,
name_afa1983c-2208-4632-93e3-1472a55cf1a1,
name_c137f4ae-dfc9-46bb-b60c-8149f7089d85,
name_de2bb8a5-1a55-4a6c-804f-8cdd66e07035
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_5ddddfc1-f2d2-4314-a77b-2b74ef0328a3,
name_eede47ae-5376-4f7c-a530-7cb2b0f99cc2,
name_3af43793-bb16-479f-9eea-041e03f1a435,
name_81f5121c-ab5a-4c75-9bd0-1d175bc91c61,
name_ce0cc8eb-fb55-4337-a2ea-70054084cca7
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_f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
name_325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
name_8097a053-7884-43e0-8ab5-40a68874524d,
name_8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
name_caf658e6-1fe1-414b-819e-a7c9e1012af5
result, different first party:
name_f79bdab1-bb37-455e-b8f4-0b1088b38a1f,
name_325bf88e-2dc5-4085-9ab1-429dfe9e7f3b,
name_8097a053-7884-43e0-8ab5-40a68874524d,
name_8385f8d8-e81c-41a4-88fc-16d7c4c3e88c,
name_caf658e6-1fe1-414b-819e-a7c9e1012af5
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, 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
|
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: 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: true, true, true, true result: Insecure website never loaded, Insecure website never loaded, Insecure website never loaded, Insecure website never loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: true, true, true, true result: Insecure website never loaded, Insecure website never loaded, Insecure website never loaded, Insecure website never loaded |
passed: false, false, false, false, false result: Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded, Insecure website loaded |
passed: 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: 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: 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 |
|
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: true, true, true, true passed: 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, true passed: true, 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: true, true, true, true passed: 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, true passed: true, 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 result: upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true result: upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
passed: true, true, true, true, true result: upgraded, upgraded, upgraded, upgraded, upgraded |
|
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 result: 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, true result: blocked, 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: plaintext passed: false, false, false, false, false |
SNI_status: encrypted passed: 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, 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: 1 passed: true, true, true, true, true |
header value: undefined passed: false, false, false, false |
header value: 1 passed: true, true, true, true, true |
header value: undefined passed: false, false, false, false |
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, 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 |
sec-gpc: 1 passed: true, true, true, true, true |
passed: false, false, false, false |
passed: false, false, false, false, false |
passed: false, false, false, false |
sec-gpc: 1 passed: true, true, true, true, true |
passed: false, false, false, false, false |
sec-gpc: 1 passed: true, true, true, true, true |
passed: false, 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: false, false, true, true, false |
passed: true, true, true, true, true |
passed: true, true, true, false |
passed: false, true, false, false, false |
passed: true, true, true, true |
passed: false, true, false, false, true |
passed: false, true, false, false, true |
passed: true, true, true, true, true |
passed: true, true, 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: false, false, false, false, false
readSameFirstParty:
147.90.235.249,
192.42.116.53,
185.246.188.74,
178.20.55.16,
171.25.193.80
readDifferentFirstParty:
192.42.116.99,
204.8.96.102,
109.70.100.12,
192.42.116.60,
185.220.100.254
passed: true, true, true, true, true
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false, false
|
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, true, false, false, false
readSameFirstParty:
2001:67c:e60:c0c:192:42:116:115,
Error: Unsupported,
2a0b:f4c0:16c:16::1,
2a03:e600:100::2,
2a0b:f4c2:4::98
readDifferentFirstParty:
2001:67c:e60:c0c:192:42:116:98,
185.243.218.225,
2001:67c:e60:c0c:192:42:116:95,
2a0b:f4c0:16c:13::1,
2620:7:6003::ffff:c759:e656
passed: true, true, true, true
testFailed: false, false, false, false, false
|
write: () => {
if (!usingTor) {
throw new Error('Unsupported');
}
}
read: async () => {
if (usingTor) {
return ipAddress;
} else {
throw new Error('Unsupported');
}
}
unsupported: true, true, true, true, true
readSameFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
readDifferentFirstParty:
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported,
Error: Unsupported
testFailed: false, false, false, false, false
|
|
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: true, true, true, true, true passed: true, true, true, true, true |
IsTorExit: false, false, false, false passed: false, false, false, false |
IsTorExit: false, false, false, false, false passed: false, false, false, false, false |
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, false passed: false, 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: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
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: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,false,false,false,false |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: true,true,true,true,true |
expression: undefined desired expression: undefined actual value: undefined desired value: undefined passed: false,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 |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
__hssc
HubSpot tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
__hstc
HubSpot tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
__s
Drip.com email address tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
_hsenc
HubSpot tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
_openstat
Yandex tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
dclid
DoubleClick Click ID (Google) |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
fbclid
Facebook Click Identifier |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
gclid
Google Click Identifier |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
hsCtaTracking
HubSpot tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
mc_eid
Mailchimp Email ID (email recipient's address) |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
mkt_tok
Adobe Marketo tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
ml_subscriber
MailerLite email tracking |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
|
ml_subscriber_hash
MailerLite email tracking |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
|
msclkid
Microsoft Click ID |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
oly_anon_id
Omeda marketing 'anonymous' customer id |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
oly_enc_id
Omeda marketing 'known' customer id |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
rb_clickid
Unknown high-entropy tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
|
s_cid
Adobe Site Catalyst tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
|
vero_conv
Vero tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
|
vero_id
Vero tracking parameter |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
wickedid
Wicked Reports e-commerce tracking |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false, false |
|
yclid
Yandex Click ID |
passed: true, true, true, true, true |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
value: 6245933415184715 passed: false, false, false, false, false |
passed: true, true, true, true, true |
value: 6245933415184715 passed: false, 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.` |
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|
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 passed: true, true, true, true, true |
url: https://munchkin.marketo.net/munchkin.js passed: , false |
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 |
url: https://munchkin.marketo.net/munchkin.js |
|
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: 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 |
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, false |
|
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: true, true, true, true, true |
url: https://s.amazon-adsystem.com/dcm passed: false, false, 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: true, true, true, true, true |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: false, false, false, false |
url: https://s.amazon-adsystem.com/dcm passed: , false, false, false, false |
|
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: true, true, true, true, true |
url: https://ib.adnxs.com/px?id=178248&t=1 passed: 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 |
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 |
|
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 passed: true, true, true, true, true |
url: https://bat.bing.com/bat.js passed: , false |
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 passed: , false, false |
url: https://bat.bing.com/bat.js passed: , false |
url: https://bat.bing.com/bat.js |
|
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: true, true, true, true, true |
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 |
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, false |
|
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: 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: true, true, true, true, true |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: , false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: false, false, false, false, false |
url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx passed: , false |
|
DoubleClick (Google)
Tests whether the browser blocks the page from loading the tracker at https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: , false |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: true, true, true, true, true |
url: https://securepubads.g.doubleclick.net/static/glade.js passed: , false |
url: https://securepubads.g.doubleclick.net/static/glade.js |
url: https://securepubads.g.doubleclick.net/static/glade.js |
|
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: 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: true, true, true, true, true |
url: https://connect.facebook.net/en_US/fbevents.js passed: 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, 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 |
|
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/ passed: true, true, true, true, true |
url: https://www.google.com/pagead/1p-user-list/ passed: , false |
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/ passed: false, false, false |
url: https://www.google.com/pagead/1p-user-list/ passed: , false |
url: https://www.google.com/pagead/1p-user-list/ passed: , false |
|
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: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: , false |
url: https://google-analytics.com/urchin.js passed: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: , false |
url: https://google-analytics.com/urchin.js passed: true, true, true, true, true |
url: https://google-analytics.com/urchin.js passed: false, false, false, false |
url: https://google-analytics.com/urchin.js |
url: https://google-analytics.com/urchin.js |
|
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: 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 |
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: , false, false |
|
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 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 |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: true, true, true, true, true |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: , false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 passed: , false, false |
url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 |
|
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: 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: true, true, true, true, true |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: , false, false, false |
url: https://js-agent.newrelic.com/nr-1212.min.js passed: false, false, false, false, false |
|
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: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: false, false |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: , false |
url: https://pixel.quantserve.com/pixel passed: true, true, true, true, true |
url: https://pixel.quantserve.com/pixel passed: false |
url: https://pixel.quantserve.com/pixel passed: false, false, false, false, false |
url: https://pixel.quantserve.com/pixel passed: false, false, false |
|
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 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 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 |
|
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: 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: 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: 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: , false |
url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json passed: false, false, false, false, false |
|
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: true, true, true, true, true |
url: https://t.co/i/adsct passed: , false, false, false |
url: https://t.co/i/adsct passed: true, true, true, true, true |
url: https://t.co/i/adsct passed: false, false, false |
url: https://t.co/i/adsct passed: true, true, true, true, true |
url: https://t.co/i/adsct passed: false, false, false |
url: https://t.co/i/adsct passed: , false, false, false |
url: https://t.co/i/adsct passed: , false, false |
|
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: true, true, true, true, true |
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 |
url: https://yandex.ru/ads/system/header-bidding.js passed: true, true, true, true, true |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
url: https://yandex.ru/ads/system/header-bidding.js passed: false, false, false, false, false |
|
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: 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: 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: true, true, true, true, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, false, 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, true url: https://munchkin.marketo.net/munchkin.js cookieFound: false, 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: 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, 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, true, true, true, true url: https://dpm.demdex.net/ibs cookieFound: false, false, 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, true url: https://dpm.demdex.net/ibs cookieFound: false, 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: 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, 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, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, 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, true, true, true, true url: https://s.amazon-adsystem.com/dcm cookieFound: false, 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: 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 |
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 |
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, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, false, 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, true url: https://ib.adnxs.com/px?id=178248&t=1 cookieFound: false, 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: 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 |
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 |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, false, 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, true url: https://bat.bing.com/bat.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://bat.bing.com/bat.js cookieFound: false, 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: 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, 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, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, 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, true, true, true, true url: https://static.chartbeat.com/js/chartbeat.js cookieFound: false, 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: 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, 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, 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, true url: https://dis.criteo.com/dis/rtb/appnexus/cookiematch.aspx cookieFound: false, 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 |
|
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: 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: 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: 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, true url: https://securepubads.g.doubleclick.net/static/glade.js cookieFound: false, 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 |
|
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: 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: 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: 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, true url: https://connect.facebook.net/en_US/fbevents.js cookieFound: false, 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 |
|
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: 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, 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, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, 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, true, true, true, true url: https://www.google.com/pagead/1p-user-list/ cookieFound: false, 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: 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 |
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 |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, false, false, false, false |
passed: true, true, true, true, true url: https://google-analytics.com/urchin.js cookieFound: false, 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: 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 |
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 |
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, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, false, false, false, false |
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, true url: https://www.googletagmanager.com/gtag.js?id=GTM-NX4SMZL cookieFound: false, 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: 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, 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, 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, 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, true url: https://dsum-sec.casalemedia.com/crum?cm_dsp_id=10&external_user_id=629685505537&C=1 cookieFound: false, 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: 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 |
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 |
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, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, false, 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, true url: https://js-agent.newrelic.com/nr-1212.min.js cookieFound: false, 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: 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, 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, true, true, true, true url: https://pixel.quantserve.com/pixel cookieFound: false, false, 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, true url: https://pixel.quantserve.com/pixel cookieFound: false, 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: 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 |
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 |
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, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, false, false, false, false |
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, true url: https://sb.scorecardresearch.com/internal-c2/default/cs.js cookieFound: false, 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: 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: 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: 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, true url: https://trc.taboola.com/futureplc-tomsguide/trc/3/json cookieFound: false, 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 |
|
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: 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, 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, true, true, true, true url: https://t.co/i/adsct cookieFound: false, false, 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, true url: https://t.co/i/adsct cookieFound: false, 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: 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 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, true url: https://yandex.ru/ads/system/header-bidding.js cookieFound: false, 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?)
|
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|
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: 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: 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 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: 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 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: 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: 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, 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
|
|
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
24049fa1-0463-4c51-8a59-425d51e216a0_1p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_1p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_1p,
77313917-effd-414b-b300-9ad1622579f4_1p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_1p
result, different session:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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 session:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_1p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_1p,
8ac18e95-eb80-4336-b17c-267774b35d7b_1p,
59e18080-6af0-4df6-b5d2-4a085cb70078_1p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_1p
result, different session:
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_1p,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_1p,
43613891-a198-46c4-b0e6-0fb356dc4264_1p,
590ce123-8283-4831-996c-31e3d54d3f2b_1p
result, different session:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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 session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_1p
result, different session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_1p,
5c041f67-aa1b-4182-b344-cc1af4fcf448_1p,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_1p,
126487c9-a41b-4995-aad6-d7f844019e4c_1p
result, different session:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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 session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_1p,
b2102ec9-f10f-46c3-b941-bdfa64802693_1p,
ba446b46-42b9-4bfa-97c2-febb74687487_1p,
e36681ab-796e-44a9-be0f-9b2da0b03789_1p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
1099b73a-b1bd-4b18-864c-a9018f08b560_1p,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_1p,
afa1983c-2208-4632-93e3-1472a55cf1a1_1p,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_1p,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_1p
result, different session:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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 session:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_1p,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_1p,
3af43793-bb16-479f-9eea-041e03f1a435_1p,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_1p,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_1p,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_1p,
8097a053-7884-43e0-8ab5-40a68874524d_1p,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_1p,
caf658e6-1fe1-414b-819e-a7c9e1012af5_1p
result, different session:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
cookie (HTTP)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
24049fa1-0463-4c51-8a59-425d51e216a0_1p_http,
14b267e4-e7ce-47e9-8e92-c7af8487b412_1p_http,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_1p_http,
77313917-effd-414b-b300-9ad1622579f4_1p_http,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_1p_http,
d3d3ae69-51f7-4893-98e5-8168b62664d7_1p_http,
8ac18e95-eb80-4336-b17c-267774b35d7b_1p_http,
59e18080-6af0-4df6-b5d2-4a085cb70078_1p_http,
95f8509d-aedd-46d0-8638-bc0f04bae62f_1p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_1p_http,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_1p_http,
43613891-a198-46c4-b0e6-0fb356dc4264_1p_http,
590ce123-8283-4831-996c-31e3d54d3f2b_1p_http
result, different session: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p_http,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p_http,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p_http,
2087b362-5137-4548-a6bc-105e72649562_1p_http,
c0bbf07f-e638-489e-b781-1b025401181d_1p_http
result, different session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p_http,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p_http,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p_http,
2087b362-5137-4548-a6bc-105e72649562_1p_http,
c0bbf07f-e638-489e-b781-1b025401181d_1p_http
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_1p_http,
5c041f67-aa1b-4182-b344-cc1af4fcf448_1p_http,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_1p_http,
126487c9-a41b-4995-aad6-d7f844019e4c_1p_http
result, different session: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${baseURI}cookie?secret=${secret}_http`);
}
read: async () => {
// Test if we now send a requests with a 'cookie' header containing the secret.
const response = await fetch(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_1p_http,
b2102ec9-f10f-46c3-b941-bdfa64802693_1p_http,
ba446b46-42b9-4bfa-97c2-febb74687487_1p_http,
e36681ab-796e-44a9-be0f-9b2da0b03789_1p_http,
55f75f72-9fba-4b05-9306-0ac7b698aa57_1p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
1099b73a-b1bd-4b18-864c-a9018f08b560_1p_http,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_1p_http,
afa1983c-2208-4632-93e3-1472a55cf1a1_1p_http,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_1p_http,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_1p_http,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_1p_http,
3af43793-bb16-479f-9eea-041e03f1a435_1p_http,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_1p_http,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_1p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_1p_http,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_1p_http,
8097a053-7884-43e0-8ab5-40a68874524d_1p_http,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_1p_http,
caf658e6-1fe1-414b-819e-a7c9e1012af5_1p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
|
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
24049fa1-0463-4c51-8a59-425d51e216a0_1p_js,
14b267e4-e7ce-47e9-8e92-c7af8487b412_1p_js,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_1p_js,
77313917-effd-414b-b300-9ad1622579f4_1p_js,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_1p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_1p_js,
d3d3ae69-51f7-4893-98e5-8168b62664d7_1p_js,
8ac18e95-eb80-4336-b17c-267774b35d7b_1p_js,
59e18080-6af0-4df6-b5d2-4a085cb70078_1p_js,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_1p_js,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_1p_js,
43613891-a198-46c4-b0e6-0fb356dc4264_1p_js,
590ce123-8283-4831-996c-31e3d54d3f2b_1p_js
result, different session: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p_js,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p_js,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p_js,
2087b362-5137-4548-a6bc-105e72649562_1p_js,
c0bbf07f-e638-489e-b781-1b025401181d_1p_js
result, different session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p_js,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p_js,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p_js,
2087b362-5137-4548-a6bc-105e72649562_1p_js,
c0bbf07f-e638-489e-b781-1b025401181d_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=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_1p_js,
5c041f67-aa1b-4182-b344-cc1af4fcf448_1p_js,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_1p_js,
126487c9-a41b-4995-aad6-d7f844019e4c_1p_js
result, different session: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_1p_js,
b2102ec9-f10f-46c3-b941-bdfa64802693_1p_js,
ba446b46-42b9-4bfa-97c2-febb74687487_1p_js,
e36681ab-796e-44a9-be0f-9b2da0b03789_1p_js,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
1099b73a-b1bd-4b18-864c-a9018f08b560_1p_js,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_1p_js,
afa1983c-2208-4632-93e3-1472a55cf1a1_1p_js,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_1p_js,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_1p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_1p_js,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_1p_js,
3af43793-bb16-479f-9eea-041e03f1a435_1p_js,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_1p_js,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_1p_js,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_1p_js,
8097a053-7884-43e0-8ab5-40a68874524d_1p_js,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_1p_js,
caf658e6-1fe1-414b-819e-a7c9e1012af5_1p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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:
24049fa1-0463-4c51-8a59-425d51e216a0_1p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_1p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_1p,
77313917-effd-414b-b300-9ad1622579f4_1p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_1p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_1p,
8ac18e95-eb80-4336-b17c-267774b35d7b_1p,
59e18080-6af0-4df6-b5d2-4a085cb70078_1p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_1p,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_1p,
43613891-a198-46c4-b0e6-0fb356dc4264_1p,
590ce123-8283-4831-996c-31e3d54d3f2b_1p
result, different session: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
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:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_1p
result, different session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_1p,
5c041f67-aa1b-4182-b344-cc1af4fcf448_1p,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_1p,
126487c9-a41b-4995-aad6-d7f844019e4c_1p
result, different session: , , ,
unsupported: false, false, false, false
passed: true, true, true, true
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_1p,
b2102ec9-f10f-46c3-b941-bdfa64802693_1p,
ba446b46-42b9-4bfa-97c2-febb74687487_1p,
e36681ab-796e-44a9-be0f-9b2da0b03789_1p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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:
1099b73a-b1bd-4b18-864c-a9018f08b560_1p,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_1p,
afa1983c-2208-4632-93e3-1472a55cf1a1_1p,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_1p,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_1p,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_1p,
3af43793-bb16-479f-9eea-041e03f1a435_1p,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_1p,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_1p,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_1p,
8097a053-7884-43e0-8ab5-40a68874524d_1p,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_1p,
caf658e6-1fe1-414b-819e-a7c9e1012af5_1p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_162873320677555,
fake_9277429586175021,
fake_8594711066674923,
fake_5565387462771694,
fake_7938485539223994
result, different session:
fake_5044658281140013,
fake_9310355486960884,
fake_6030660066174836,
fake_5111265051737794,
fake_6267035978512705
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_03885197866251722,
fake_43539049190084333,
fake_1921341531886005,
fake_2076915007428597,
fake_6653560718708997
result, different session:
fake_6013775439897666,
fake_6740265802079721,
fake_7353949729413647,
fake_3526582891510992,
fake_8402109780122529
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_456003586820831,
fake_20108776919235116,
fake_2280074387496449,
fake_22341411138170852
result, different session:
fake_38425625579831624,
fake_07301091880142385,
fake_8398702960541036,
fake_06883268241460505
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_43063079350970135,
fake_2642532563629201,
fake_4723556451353501,
fake_45242580173759195,
fake_13117699920753068
result, different session:
fake_43063079350970135,
fake_2642532563629201,
fake_4723556451353501,
fake_45242580173759195,
fake_13117699920753068
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_6136023358351648,
fake_9209484901062501,
fake_9200880170719754,
fake_3296538295661886
result, different session:
fake_9246816779315596,
fake_7342151543706621,
fake_3743033313976223,
fake_7839359217842115
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_779735931987517,
fake_8155564250770371,
fake_7008598212380506,
fake_523210444499143,
fake_44672698225524377
result, different session:
fake_9050179807979131,
fake_7421539246918913,
fake_9175550383360072,
fake_7589275320451716,
fake_843805189924842
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_7314118860156777,
fake_9630421973029846,
fake_1741401606310924,
fake_4849984054531755,
fake_18537334155311758
result, different session:
fake_33050393742274653,
fake_7314532269316212,
fake_10492401536306373,
fake_591001606011281,
fake_6974521252509662
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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="${href}">`;
const testElement = document.querySelector('#css');
let fontFamily;
while (true) {
await sleepMs(100);
fontFamily = window.getComputedStyle(testElement).fontFamily;
if (fontFamily.startsWith('fake')) {
break;
}
}
console.log(fontFamily);
return fontFamily;
}
result, same session:
fake_4281443696474383,
fake_6616828872060065,
fake_9120462814382382,
fake_8404277101938755,
fake_03520239253109114
result, different session:
fake_3728307143235876,
fake_4918806930408579,
fake_746646664836174,
fake_8457849628214493,
fake_8098231118272237
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<link type="text/css" rel="stylesheet" href="${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_7171186382391634,
fake_1576425760690856,
fake_10812539209141336,
fake_9238701574570514,
fake_4326243898973954
result, different session:
fake_1873645226259093,
fake_16985142098405204,
fake_7134925640621423,
fake_11264198231457567,
fake_6343584427659936
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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: 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: 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: 1, 1, 1, 1
result, different session: 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 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: 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 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: 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: 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, 2
result, different session: 4, 4, 4, 4, 4
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1
result, different session: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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("${fontURI}"); } #text { font-family: "myFont" }`;
document.getElementsByTagName('head')[0].appendChild(style);
let newWidth;
do {
await sleepMs(100);
newWidth = text.getBoundingClientRect().width;
} while (newWidth < 0 || newWidth === originalWidth);
const response = await fetch(
testURI('ctr', 'font', key), { cache: 'reload' });
return (await response.text()).trim();
}
result, same session: 1, 1, 1, 1, 1
result, different session: 2, 2, 2, 2, 2
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
const style = document.createElement('style');
style.type = 'text/css';
const fontURI = testURI('resource', 'font', key);
style.innerHTML = `@font-face {font-family: "myFont"; src: url("${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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0_1p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_1p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_1p,
77313917-effd-414b-b300-9ad1622579f4_1p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_1p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_1p,
8ac18e95-eb80-4336-b17c-267774b35d7b_1p,
59e18080-6af0-4df6-b5d2-4a085cb70078_1p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_1p,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_1p,
43613891-a198-46c4-b0e6-0fb356dc4264_1p,
590ce123-8283-4831-996c-31e3d54d3f2b_1p
result, different session: 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 session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_1p
result, different session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_1p,
5c041f67-aa1b-4182-b344-cc1af4fcf448_1p,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_1p,
126487c9-a41b-4995-aad6-d7f844019e4c_1p
result, different session: 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 session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_1p,
b2102ec9-f10f-46c3-b941-bdfa64802693_1p,
ba446b46-42b9-4bfa-97c2-febb74687487_1p,
e36681ab-796e-44a9-be0f-9b2da0b03789_1p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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:
1099b73a-b1bd-4b18-864c-a9018f08b560_1p,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_1p,
afa1983c-2208-4632-93e3-1472a55cf1a1_1p,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_1p,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_1p,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_1p,
3af43793-bb16-479f-9eea-041e03f1a435_1p,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_1p,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_1p,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_1p,
8097a053-7884-43e0-8ab5-40a68874524d_1p,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_1p,
caf658e6-1fe1-414b-819e-a7c9e1012af5_1p
result, different session: undefined
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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:
24049fa1-0463-4c51-8a59-425d51e216a0_1p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_1p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_1p,
77313917-effd-414b-b300-9ad1622579f4_1p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_1p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_1p,
8ac18e95-eb80-4336-b17c-267774b35d7b_1p,
59e18080-6af0-4df6-b5d2-4a085cb70078_1p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_1p,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_1p,
43613891-a198-46c4-b0e6-0fb356dc4264_1p,
590ce123-8283-4831-996c-31e3d54d3f2b_1p
result, different session: , , ,
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 session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_1p
result, different session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_1p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_1p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_1p,
2087b362-5137-4548-a6bc-105e72649562_1p,
c0bbf07f-e638-489e-b781-1b025401181d_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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_1p,
5c041f67-aa1b-4182-b344-cc1af4fcf448_1p,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_1p,
126487c9-a41b-4995-aad6-d7f844019e4c_1p
result, different session: , , ,
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 session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_1p,
b2102ec9-f10f-46c3-b941-bdfa64802693_1p,
ba446b46-42b9-4bfa-97c2-febb74687487_1p,
e36681ab-796e-44a9-be0f-9b2da0b03789_1p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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:
1099b73a-b1bd-4b18-864c-a9018f08b560_1p,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_1p,
afa1983c-2208-4632-93e3-1472a55cf1a1_1p,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_1p,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_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:
5ddddfc1-f2d2-4314-a77b-2b74ef0328a3_1p,
eede47ae-5376-4f7c-a530-7cb2b0f99cc2_1p,
3af43793-bb16-479f-9eea-041e03f1a435_1p,
81f5121c-ab5a-4c75-9bd0-1d175bc91c61_1p,
ce0cc8eb-fb55-4337-a2ea-70054084cca7_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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_1p,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_1p,
8097a053-7884-43e0-8ab5-40a68874524d_1p,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_1p,
caf658e6-1fe1-414b-819e-a7c9e1012af5_1p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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: 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 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 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: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, 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 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: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, 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 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 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: 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 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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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: 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: 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 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: 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 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: 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: 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, 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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0_3p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_3p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_3p,
77313917-effd-414b-b300-9ad1622579f4_3p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_3p
result, different session:
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_3p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_3p,
8ac18e95-eb80-4336-b17c-267774b35d7b_3p,
59e18080-6af0-4df6-b5d2-4a085cb70078_3p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_3p
result, different session:
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url'),
Error: Cannot read properties of undefined (reading 'url')
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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 session:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_3p,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_3p,
43613891-a198-46c4-b0e6-0fb356dc4264_3p,
590ce123-8283-4831-996c-31e3d54d3f2b_3p
result, different session:
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_3p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_3p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_3p,
2087b362-5137-4548-a6bc-105e72649562_3p,
c0bbf07f-e638-489e-b781-1b025401181d_3p
result, different session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_3p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_3p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_3p,
2087b362-5137-4548-a6bc-105e72649562_3p,
c0bbf07f-e638-489e-b781-1b025401181d_3p
unsupported: false, false, false, false, false
passed: false, false, false, false, false
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_3p,
5c041f67-aa1b-4182-b344-cc1af4fcf448_3p,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_3p,
126487c9-a41b-4995-aad6-d7f844019e4c_3p
result, different session:
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_3p,
b2102ec9-f10f-46c3-b941-bdfa64802693_3p,
ba446b46-42b9-4bfa-97c2-febb74687487_3p,
e36681ab-796e-44a9-be0f-9b2da0b03789_3p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_3p
result, different session:
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined,
Error: can't access property "url",
cacheKeys[0] is undefined
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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:
1099b73a-b1bd-4b18-864c-a9018f08b560_3p,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_3p,
afa1983c-2208-4632-93e3-1472a55cf1a1_3p,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_3p,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_3p
result, different session:
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=${key}`]);
} catch (e) {
throw new Error('Unsupported');
}
}
read: async () => {
const cache = await window.caches.open('supercookies');
const cacheKeys = await cache.keys();
const url = cacheKeys[0].url;
return (new URL(url)).searchParams.get('key');
}
result, same session:
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.
result, different session:
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.,
Error: The operation is insecure.
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (key) => {
try {
const cache = await window.caches.open('supercookies');
cache.addAll([`test.css?key=${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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_3p,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_3p,
8097a053-7884-43e0-8ab5-40a68874524d_3p,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_3p,
caf658e6-1fe1-414b-819e-a7c9e1012af5_3p
result, different session:
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
|
|
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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session:
24049fa1-0463-4c51-8a59-425d51e216a0_3p_http,
14b267e4-e7ce-47e9-8e92-c7af8487b412_3p_http,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_3p_http,
77313917-effd-414b-b300-9ad1622579f4_3p_http,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_3p_http
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_3p_http,
d3d3ae69-51f7-4893-98e5-8168b62664d7_3p_http,
8ac18e95-eb80-4336-b17c-267774b35d7b_3p_http,
59e18080-6af0-4df6-b5d2-4a085cb70078_3p_http,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session: , , ,
result, different session: , , ,
unsupported: true, true, true, true
passed: undefined
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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: , , , ,
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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session: , , ,
result, different session: , , ,
unsupported: true, true, true, true
passed: undefined
test failed: false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_3p_http,
b2102ec9-f10f-46c3-b941-bdfa64802693_3p_http,
ba446b46-42b9-4bfa-97c2-febb74687487_3p_http,
e36681ab-796e-44a9-be0f-9b2da0b03789_3p_http,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: async (secret) => {
// Request a page that will send an HTTPOnly 'set-cookie' response header with secret value.
await fetch(`${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: , , , ,
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(`${baseURI}headers`);
const cookie = (await response.json()).cookie;
return cookie ? cookie.match(/secret=([\w-]+)/)[1] : null;
}
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
|
cookie (JS)
The cookie, first introduced by Netscape in 1994, is a small amount of data stored by your browser on a website's behalf. It has legitimate uses, but it is also the classic cross-site tracking mechanism, and today still the most popular method of tracking users across websites. Browsers can stop cookies from being used for cross-site tracking by either blocking or partitioning them. |
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
24049fa1-0463-4c51-8a59-425d51e216a0_3p_js,
14b267e4-e7ce-47e9-8e92-c7af8487b412_3p_js,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_3p_js,
77313917-effd-414b-b300-9ad1622579f4_3p_js,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_3p_js,
d3d3ae69-51f7-4893-98e5-8168b62664d7_3p_js,
8ac18e95-eb80-4336-b17c-267774b35d7b_3p_js,
59e18080-6af0-4df6-b5d2-4a085cb70078_3p_js,
95f8509d-aedd-46d0-8638-bc0f04bae62f_3p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , ,
result, different session: , , ,
unsupported: true, true, true, true
passed: undefined
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , ,
result, different session: , , ,
unsupported: true, true, true, true
passed: undefined
test failed: false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_3p_js,
b2102ec9-f10f-46c3-b941-bdfa64802693_3p_js,
ba446b46-42b9-4bfa-97c2-febb74687487_3p_js,
e36681ab-796e-44a9-be0f-9b2da0b03789_3p_js,
55f75f72-9fba-4b05-9306-0ac7b698aa57_3p_js
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, false, false, false, false
|
write: (secret) => {
document.cookie = `secret=${secret}_js; max-age=3600; SameSite=None; Secure`;
}
read: () => document.cookie ? document.cookie.match(/secret=([\w-]+)/)[1] : null
result, same session: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, 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:
24049fa1-0463-4c51-8a59-425d51e216a0_3p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_3p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_3p,
77313917-effd-414b-b300-9ad1622579f4_3p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_3p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_3p,
8ac18e95-eb80-4336-b17c-267774b35d7b_3p,
59e18080-6af0-4df6-b5d2-4a085cb70078_3p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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: , , ,
result, different session: , , ,
unsupported: true, true, true, true
passed: undefined
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: , , , ,
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: , , ,
result, different session: , , ,
unsupported: true, true, true, true
passed: undefined
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:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_3p,
b2102ec9-f10f-46c3-b941-bdfa64802693_3p,
ba446b46-42b9-4bfa-97c2-febb74687487_3p,
e36681ab-796e-44a9-be0f-9b2da0b03789_3p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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: , , , ,
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: , , , ,
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: , , , ,
result, different session: , , , ,
unsupported: true, true, true, true, true
passed: undefined
test failed: false, 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_6741699183975047,
fake_15461627808104916,
fake_43275888600232526,
fake_18673819460233498,
fake_7042502324279702
result, different session:
fake_33908327995547705,
fake_05761327767740276,
fake_7319835469463272,
fake_02868230418190132,
fake_6148728539634842
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_2859791872151414,
fake_5871700887273439,
fake_39084609108870727,
fake_8413712182080901,
fake_34969307947325534
result, different session:
fake_9140574504065231,
fake_8731461211233547,
fake_665461063141749,
fake_940870909310868,
fake_9586521418459104
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_13050086328629296,
fake_25026954752065556,
fake_9427357365779545,
fake_37484512308938855
result, different session:
fake_9477330134023814,
fake_6121800267875628,
fake_25940937240615014,
fake_29395248625263815
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<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_9825659547204837,
fake_08786216430764293,
fake_5891927533554442,
fake_025497797515992016,
fake_8597725363341575
result, different session:
fake_9825659547204837,
fake_08786216430764293,
fake_5891927533554442,
fake_025497797515992016,
fake_8597725363341575
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_8781156647130708,
fake_9950543555828677,
fake_35050175039808273,
fake_5568955938640712
result, different session:
fake_09224015869950364,
fake_5318930513040114,
fake_374169579694936,
fake_6541612966665846
unsupported: false, false, false, false
passed: true, true, true, true
test failed: false, false, false, false
|
write: async (key) => {
const href = testURI('resource', 'css', key);
const head = document.getElementsByTagName('head')[0];
head.innerHTML += `<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_8159643143439395,
fake_8265920555893611,
fake_8164072574866972,
fake_09415673167541527,
fake_1197200614232461
result, different session:
fake_2840900949900247,
fake_5187255311502741,
fake_530635683160811,
fake_8197300241693501,
fake_3352809240503829
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_03964626582806785,
fake_144156385115787,
fake_07639900201173844,
fake_6203038779091996,
fake_07121175876362695
result, different session:
fake_866456488808456,
fake_28474671884714553,
fake_554750915284278,
fake_15519425522934505,
fake_49919091527035175
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_44067981981257076,
fake_9151797627704015,
fake_05300493022520092,
fake_0726281946412135,
fake_27779981745667603
result, different session:
fake_5294228320762329,
fake_5926674799222176,
fake_9081247778649293,
fake_2198306986852916,
fake_3607276606170544
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_06931347187432824,
fake_11539045302406836,
fake_38616189508915655,
fake_18998002181580875,
fake_4575272826577288
result, different session:
fake_1432784746515099,
fake_9922995324417658,
fake_7627259167923572,
fake_6222789601552297,
fake_5094426393227565
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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: 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: 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: 1, 1, 1, 1
result, different session: 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 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: 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 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: 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: 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, 2
result, different session: 4, 4, 4, 4, 4
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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: 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, 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: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
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
result, different session: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, true
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: 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, 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, 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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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:
24049fa1-0463-4c51-8a59-425d51e216a0_3p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_3p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_3p,
77313917-effd-414b-b300-9ad1622579f4_3p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_3p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_3p,
8ac18e95-eb80-4336-b17c-267774b35d7b_3p,
59e18080-6af0-4df6-b5d2-4a085cb70078_3p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_3p,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_3p,
43613891-a198-46c4-b0e6-0fb356dc4264_3p,
590ce123-8283-4831-996c-31e3d54d3f2b_3p
result, different session: 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 session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_3p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_3p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_3p,
2087b362-5137-4548-a6bc-105e72649562_3p,
c0bbf07f-e638-489e-b781-1b025401181d_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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_3p,
5c041f67-aa1b-4182-b344-cc1af4fcf448_3p,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_3p,
126487c9-a41b-4995-aad6-d7f844019e4c_3p
result, different session: 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 session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_3p,
b2102ec9-f10f-46c3-b941-bdfa64802693_3p,
ba446b46-42b9-4bfa-97c2-febb74687487_3p,
e36681ab-796e-44a9-be0f-9b2da0b03789_3p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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:
1099b73a-b1bd-4b18-864c-a9018f08b560_3p,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_3p,
afa1983c-2208-4632-93e3-1472a55cf1a1_3p,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_3p,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_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:
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_3p,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_3p,
8097a053-7884-43e0-8ab5-40a68874524d_3p,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_3p,
caf658e6-1fe1-414b-819e-a7c9e1012af5_3p
result, different session: undefined
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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:
24049fa1-0463-4c51-8a59-425d51e216a0_3p,
14b267e4-e7ce-47e9-8e92-c7af8487b412_3p,
f83e2b50-5225-4b57-9b61-235f63b8dfe5_3p,
77313917-effd-414b-b300-9ad1622579f4_3p,
ab49c33b-d8a2-47bf-b59a-1bc95dc49db6_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:
14fc38c7-1632-47ef-aed9-68c140a6c1f6_3p,
d3d3ae69-51f7-4893-98e5-8168b62664d7_3p,
8ac18e95-eb80-4336-b17c-267774b35d7b_3p,
59e18080-6af0-4df6-b5d2-4a085cb70078_3p,
95f8509d-aedd-46d0-8638-bc0f04bae62f_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:
8a9aef3a-e24e-4a52-8f3f-7b7e1e44aea9_3p,
9b31b1a1-2f1d-4e7f-8ea4-8ae659981737_3p,
43613891-a198-46c4-b0e6-0fb356dc4264_3p,
590ce123-8283-4831-996c-31e3d54d3f2b_3p
result, different session: , , ,
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 session:
75fc4c44-97d4-41ae-8c7a-4716038b93f0_3p,
da9c2ff3-5817-44da-bf9c-efe65d13703c_3p,
235abae5-d3ed-4a57-b4c8-bc7a2838b061_3p,
2087b362-5137-4548-a6bc-105e72649562_3p,
c0bbf07f-e638-489e-b781-1b025401181d_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:
98d7588a-3b9c-4a98-9150-18e68fb68ef4_3p,
5c041f67-aa1b-4182-b344-cc1af4fcf448_3p,
2d1e2109-c1e7-41bc-bb38-40738285d4e3_3p,
126487c9-a41b-4995-aad6-d7f844019e4c_3p
result, different session: , , ,
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 session:
ebac3097-9ad0-4d81-90c3-a92d22d9168e_3p,
b2102ec9-f10f-46c3-b941-bdfa64802693_3p,
ba446b46-42b9-4bfa-97c2-febb74687487_3p,
e36681ab-796e-44a9-be0f-9b2da0b03789_3p,
55f75f72-9fba-4b05-9306-0ac7b698aa57_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:
1099b73a-b1bd-4b18-864c-a9018f08b560_3p,
7dbf130d-dbc6-4a2a-b4fd-479ca32a3585_3p,
afa1983c-2208-4632-93e3-1472a55cf1a1_3p,
c137f4ae-dfc9-46bb-b60c-8149f7089d85_3p,
de2bb8a5-1a55-4a6c-804f-8cdd66e07035_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:
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:
f79bdab1-bb37-455e-b8f4-0b1088b38a1f_3p,
325bf88e-2dc5-4085-9ab1-429dfe9e7f3b_3p,
8097a053-7884-43e0-8ab5-40a68874524d_3p,
8385f8d8-e81c-41a4-88fc-16d7c4c3e88c_3p,
caf658e6-1fe1-414b-819e-a7c9e1012af5_3p
result, different session: , , , ,
unsupported: false, false, false, false, false
passed: true, true, true, true, true
test failed: false, 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: 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 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 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: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, 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 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: 2, 2, 2, 2
unsupported: false, false, false, false
passed: true, true, true, 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 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 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: 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 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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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: 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, 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: 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 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: 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 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, 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, 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, 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
|
|
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. |
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|
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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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 leak detected: 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, true leak detected: false, 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: true, true, true, true, true leak detected: false, false, false, false, false |
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 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, false leak detected: true, 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 leak detected: 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, true leak detected: false, 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: 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 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, false leak detected: true, true, true, true, true |