en-
US/docs/Web/API/Document/browsingTopics) method or send a request with a [ `
Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics)
header will fail with a ` NotAllowedError ` [ ` DOMException ` ](/en-
US/docs/Web/API/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 ](/en-US/docs/Web/HTTP/Headers/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 ](https://patcg-individual-
drafts.github.io/topics/) .

##  Browser compatibility

BCD tables only load in the browser  with JavaScript enabled. Enable
JavaScript to view data.

##  See also

  * [ ` Permissions-Policy ` ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy) header 
  * [ Permissions Policy ](/en-US/docs/Web/HTTP/Permissions_Policy)
  * [ Topics API ](/en-US/docs/Web/API/Topics_API)
  * [ ` Document.browsingTopics() ` ](/en-US/docs/Web/API/Document/browsingTopics)

##  Help improve MDN

Was this page helpful to you?

Yes  No

[ Learn how to contribute
](https://github.com/mdn/content/blob/main/CONTRIBUTING.md "This will take you
to our contribution guidelines on GitHub.") .

This page was last modified on  Feb 28, 2024  by  [ MDN contributors ](/en-
US/docs/Web/HTTP/Headers/Permissions-Policy/browsing-topics/contributors.txt)
.

[ View this page on GitHub
](https://github.com/mdn/content/blob/main/files/en-
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topics&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-
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topics%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-
US%2Fdocs%2FWeb%2FHTTP%2FHeaders%2FPermissions-Policy%2Fbrowsing-
topics%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fhttp%2Fheaders%2Fpermissions-policy%2Fbrowsing-
topics%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F81dbd6314e340cfff2a489b370a3ec6d53c74287%0A*+Document+last+modified%3A+2024-02-28T17%3A12%3A44.000Z%0A%0A%3C%2Fdetails%3E
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