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43862 container style queries#29599

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dletorey wants to merge 5 commits intomdn:mainfrom
dletorey:43862-container-style-queries
Open

43862 container style queries#29599
dletorey wants to merge 5 commits intomdn:mainfrom
dletorey:43862-container-style-queries

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@dletorey
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@dletorey dletorey commented May 4, 2026

Summary

  • Updated FF suport for @container style() queries
  • Added FF support for @container style() queries range syntax

Test results and supporting details

  • Tested @container style() queries, using codepen in:
    • Firefox Beta 151
    • Firefox Developer Edition 151
    • Firefox Nightly 152
  • Tested @container style() queries range syntax with the flag layout.css.attr.enabled, using codepen in:
    • Firefox Beta 151
    • Firefox Developer Edition 151
    • Firefox Nightly 152

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 May 4, 2026
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github-actions Bot commented May 4, 2026

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

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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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