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added ff release notes for :heading pseudo-classes #40655

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@dletorey dletorey commented Aug 6, 2025

Description

  • Added experimental release notes for :heading pseudo-class and :heading() functional pseudo-class
  • Added note to the Firefox 142 release page

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@dletorey dletorey requested a review from a team as a code owner August 6, 2025 14:28
@dletorey dletorey requested review from dipikabh and removed request for a team August 6, 2025 14:28
@github-actions github-actions bot added Content:Firefox Content in the Mozilla/Firefox subtree size/s [PR only] 6-50 LoC changed labels Aug 6, 2025
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github-actions bot commented Aug 6, 2025

Preview URLs

Flaws (6)

URL: /en-US/docs/Mozilla/Firefox/Experimental_features
Title: Experimental features in Firefox
Flaw count: 3

  • broken_links:
    • Can't resolve /en-US/docs/Web/CSS/:heading_function#functional_notation
  • macros:
    • Can't resolve /en-US/docs/Web/CSS/:heading
    • Can't resolve /en-US/docs/Web/CSS/:heading_function

URL: /en-US/docs/Mozilla/Firefox/Releases/142
Title: Firefox 142 for developers
Flaw count: 3

  • broken_links:
    • Can't resolve /en-US/docs/Web/CSS/:heading_function#functional_notation
  • macros:
    • Can't resolve /en-US/docs/Web/CSS/:heading
    • Can't resolve /en-US/docs/Web/CSS/:heading_function
External URLs (2)

URL: /en-US/docs/Mozilla/Firefox/Experimental_features
Title: Experimental features in Firefox


URL: /en-US/docs/Mozilla/Firefox/Releases/142
Title: Firefox 142 for developers

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Looking good, thank you!

@@ -337,6 +337,20 @@ The CSS {{CSSXRef("anchor-size")}} function enables setting anchor-positioned el
- `layout.css.anchor-positioning.enabled`
- : Set to `true` to enable.

### `:heading` and `:heading()` pseudo-classes

The CSS {{CSSXRef(":heading")}} pseudo-class allows you to style all [heading elements](/en-US/docs/Web/HTML/Reference/Elements/Heading_Elements) (`<h1>`-`<h6>`) at once rather than targeting them individually. The {{CSSXRef(":heading_function", ":heading()")}} functional pseudo-class allows you to style heading elements with the [`<An+B>`](/en-US/docs/Web/CSS/:heading_function#functional_notation) syntax. ([Firefox bug 1974386](https://bugzil.la/1974386)).
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Suggested change
The CSS {{CSSXRef(":heading")}} pseudo-class allows you to style all [heading elements](/en-US/docs/Web/HTML/Reference/Elements/Heading_Elements) (`<h1>`-`<h6>`) at once rather than targeting them individually. The {{CSSXRef(":heading_function", ":heading()")}} functional pseudo-class allows you to style heading elements with the [`<An+B>`](/en-US/docs/Web/CSS/:heading_function#functional_notation) syntax. ([Firefox bug 1974386](https://bugzil.la/1974386)).
The {{CSSXRef(":heading")}} pseudo-class allows you to style all [heading elements](/en-US/docs/Web/HTML/Reference/Elements/Heading_Elements) (`<h1>`-`<h6>`) at once, rather than targeting them individually. The {{CSSXRef(":heading_function", ":heading()")}} functional pseudo-class allows you to style heading elements that match the [`<An+B>`](/en-US/docs/Web/CSS/:heading_function#functional_notation) notation. ([Firefox bug 1974386](https://bugzil.la/1974386)).

@@ -86,6 +86,10 @@ Firefox 142 is the current [Beta version of Firefox](https://www.firefox.com/en-

The CSS {{CSSXRef("anchor-size")}} function enables setting anchor-positioned element's size, position, and margins relative to the dimensions of anchor elements. ([Firefox bug 1972610](https://bugzil.la/1972610)).

- **`:heading`** and **`:heading()`**: `layout.css.anchor-positioning.enabled`

The CSS {{CSSXRef(":heading")}} pseudo-class allows you to style all [heading elements](/en-US/docs/Web/HTML/Reference/Elements/Heading_Elements) (`<h1>`-`<h6>`) at once rather than targeting them individually. The {{CSSXRef(":heading_function", ":heading()")}} functional pseudo-class allows you to style heading elements with the [`<An+B>`](/en-US/docs/Web/CSS/:heading_function#functional_notation) syntax. ([Firefox bug 1974386](https://bugzil.la/1974386)).
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same nits can be applied here

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