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Firefox 149 fixes bug in CSS ::highlight() and text-shadow#29498

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caugner merged 1 commit into
mdn:mainfrom
cpmsmith:ff-css-highlight-shadow
Apr 17, 2026
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Firefox 149 fixes bug in CSS ::highlight() and text-shadow#29498
caugner merged 1 commit into
mdn:mainfrom
cpmsmith:ff-css-highlight-shadow

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Summary

Switched Firefox to fully supporting ::highlight() as of version 149.

Test results and supporting details

The linked bug was fixed in version 149, so if the two listed bugs were the thing making the implementation "partial", that no longer applies.

I confirmed that it works in Firefox 149 on macOS with this Codepen, which is just a modification of this MDN demo with a text-shadow added to one of the highlights:

image

Related issues

This more or less supersedes #28375, which was under some debate concerning this bug, and which is not as important if the bug is fixed.

The [linked bug](https://bugzil.la/1845447) was fixed in version 149, so
if the two listed bugs were the thing making the implementation
"partial", that no longer applies. This supersedes
mdn#28375.
@github-actions github-actions Bot added data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:s [PR only] 7-24 LoC changed labels Apr 16, 2026
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Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

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LGTM, thank you!

@caugner caugner merged commit 3ec9ad3 into mdn:main Apr 17, 2026
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data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:s [PR only] 7-24 LoC changed

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