Limited Availability

Topics

The topics API reports a user's likely subject-matter interests (as determined by the browser, known as topics) to iframes. This allows for interest-based advertising that does not rely on user's exact browsing history, third-party cookies, or fingerprinting.

Baseline Status: This feature is currently Limited and is missing in at least one major browser engine.

Desktop Browser Engine Support

Google Chrome

—

Unsupported

Mozilla Firefox

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Unsupported

Apple Safari

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Unsupported

Microsoft Edge

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Unsupported

Mobile Browser Engine Support

Chrome Android

—

Firefox Android

—

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.Document.browsingTopics ↗ api.HTMLIFrameElement.browsingTopics ↗ api.Request.Request.options_parameter.browsingTopics ↗ api.fetch.options_parameter.browsingTopics ↗ html.elements.iframe.allow.browsing-topics ↗ html.elements.iframe.browsingtopics ↗ http.headers.Observe-Browsing-Topics ↗ http.headers.Permissions-Policy.browsing-topics ↗ http.headers.Sec-Browsing-Topics ↗