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Firefox Android unshipped X-Frame-Options header ALLOW-FROM directive#29069

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Elchi3 merged 2 commits intomainfrom
20676-X-Frame-Options-in-Firefox-Android
Feb 18, 2026
Merged

Firefox Android unshipped X-Frame-Options header ALLOW-FROM directive#29069
Elchi3 merged 2 commits intomainfrom
20676-X-Frame-Options-in-Firefox-Android

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@caugner caugner commented Feb 17, 2026

Summary

  1. Updates the Firefox Android support statement for the X-Frame-Options header ALLOW-FROM directive.
  2. Removes the feature altogether, because all browsers unshipped it more than 2.5 years ago.

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Related issues

Fixes #20676.

@github-actions github-actions bot added data:http Compat data for HTTP features. https://developer.mozilla.org/docs/Web/HTTP size:xs [PR only] 0-6 LoC changed labels Feb 17, 2026
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github-actions bot commented Feb 17, 2026

Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

@github-actions github-actions bot added size:m [PR only] 25-100 LoC changed and removed size:xs [PR only] 0-6 LoC changed labels Feb 17, 2026
@caugner caugner changed the title Firefox Android unshipped X-Frame-Options ALLOW-FROM directive Firefox Android unshipped X-Frame-Options header ALLOW-FROM directive Feb 17, 2026
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Thanks! 👍

@Elchi3 Elchi3 merged commit 639ec5d into main Feb 18, 2026
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@Elchi3 Elchi3 deleted the 20676-X-Frame-Options-in-Firefox-Android branch February 18, 2026 11:20
@mdn-bot mdn-bot mentioned this pull request Feb 18, 2026
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data:http Compat data for HTTP features. https://developer.mozilla.org/docs/Web/HTTP size:m [PR only] 25-100 LoC changed

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Firefox for Android + Opera have lots of incorrect compatability data (e.g., http.headers.Cross-Origin-Resource-Policy)

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