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Firefox 155 ships CSS alpha() - #30260

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Elchi3 merged 2 commits into
mdn:mainfrom
dletorey:44844-alpha-function
Aug 18, 2026
Merged

Firefox 155 ships CSS alpha()#30260
Elchi3 merged 2 commits into
mdn:mainfrom
dletorey:44844-alpha-function

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@dletorey

@dletorey dletorey commented Aug 18, 2026

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Summary

  • Added version added & Flag for alpha() CSS function in Firefox

Test results and supporting details

  • Tested in the following with this CodePen:
    • Firefox Nightly 155.0a1 - no flag
    • Firefox Developer Edition 154.0b10 - with flag
    • Firefox Beta 154.0b10 - with flag
    • Firefox Developer Edition 155.0b1 - no flag
    • Firefox Beta 155.0b1 - no flag

Related issues

@github-actions github-actions Bot added the data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS label Aug 18, 2026
@github-actions github-actions Bot added the size:s [PR only] 7-24 LoC changed label Aug 18, 2026
@github-actions

github-actions Bot commented Aug 18, 2026

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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:xs [PR only] 0-6 LoC changed and removed size:s [PR only] 7-24 LoC changed labels Aug 18, 2026
@dletorey

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This moved on quickly and I have now updated it to 155

@Elchi3 Elchi3 changed the title updated version added for color.alpha in firefox Firefox 155 ships CSS alpha() Aug 18, 2026

@Elchi3 Elchi3 left a comment

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Thanks Dave! 👍

@Elchi3
Elchi3 merged commit c72778f into mdn:main Aug 18, 2026
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@dletorey
dletorey deleted the 44844-alpha-function branch August 18, 2026 11:42
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data:css Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:xs [PR only] 0-6 LoC changed

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2 participants