Related website setsLimited availability

Related website sets declares relationships between sites so the browser allows cookie and storage access between them through methods such as document.requestStorageAccessFor().

Not yet supported in all major browsers — check the table and provide a fallback.

Discouraged: Following the announcement that Chrome will maintain its current approach to third-party cookies, Chrome decided to withdraw certain Privacy Sandbox features including the related website sets.

How to use ↓Compare browsers

Browser support

DesktopChrome

1–118Not supported

119+Supportedsince Oct 31, 2023

Current: 155

Edge

12–118Not supported

119+Supportedsince Nov 2, 2023

Current: 154

Firefox

✕Not supportedup to 157

Current: 157

Safari

✕Not supportedup to 27

Current: 27

MobileChrome Android

18–119Not supported

120+Supportedsince Dec 5, 2023

Current: 155

Firefox Android

✕Not supportedup to 157

Current: 157

Safari iOS

✕Not supportedup to 27

Current: 27

How to use

Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.

Example

Full syntax and examples are on MDN: requestStorageAccessFor.

Feature detection

JS · check before using

if ("Document" in globalThis && "requestStorageAccessFor" in Document.prototype) {
  // Document.requestStorageAccessFor is available
}

Documentation (MDN)

requestStorageAccessFor ↗

Specification

Sub-features

Support for each part of the feature (2). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
Document.requestStorageAccessFor	119	119	✕	✕	119	✕	✕
Permissions.permission_top-level-storage-access	113	113	✕	✕	120	✕	✕