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@chrisdavidmills chrisdavidmills commented Dec 9, 2025

Summary

Firefox 147 adds support for the counter-* and quotes properties on the ::marker pseudo-element. See https://bugzilla.mozilla.org/show_bug.cgi?id=2000404.

This PR adds a separate data point for counter-* and quotes, as I thought some browsers may conceivably add support separately, and they feel like different concerns.

Test results and supporting details

I have created a test case at https://codepen.io/Chris-Mills/pen/yyOGdGJ?editors=1100. In testing, I found that the features:

  • Work in Firefox 147, but not 146
  • Don't work in Chrome Canary or Safari technology preview.

Related issues

@github-actions github-actions bot added data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:m [PR only] 25-100 LoC changed labels Dec 9, 2025
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github-actions bot commented Dec 9, 2025

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

@caugner caugner changed the title Firefox 147 supports the counter-* and quotes properties on ::marker Firefox 147 supports counter-* and quotes properties on ::marker Dec 10, 2025
chrisdavidmills and others added 3 commits January 7, 2026 09:41
Co-authored-by: Claas Augner <495429+caugner@users.noreply.github.com>
Co-authored-by: Claas Augner <495429+caugner@users.noreply.github.com>
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data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:m [PR only] 25-100 LoC changed

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