Permissions-Policy: browsing-topics

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The HTTP Permissions-Policy header browsing-topics directive controls access to the Topics API.

Where a policy specifically disallows the use of the Topics API, any attempts to call the Document.browsingTopics() method or send a request with a Sec-Browsing-Topics header will fail with a NotAllowedError DOMException.

Syntax

http
Permissions-Policy: browsing-topics=<allowlist>;
<allowlist>

A list of origins for which permission is granted to use the feature. See Permissions-Policy > Syntax for more details.

Default policy

The default allowlist for browsing-topics is *.

Specifications

This feature is not part of an official standard, although it is specified in the Topics API Unofficial Proposal Draft.

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
browsing-topics
ExperimentalNon-standard

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.
Non-standard. Check cross-browser support before using.

See also