Firefox 145: Add experimental features entry for position-area

[chrisdavidmills]

Description

Firefox 145 adds support for the position-area property: see https://bugzilla.mozilla.org/show_bug.cgi?id=1924086. From testing, it appears to be only enabled in nightly builds.

This PR adds an entry for position-area to the Firefox Experimental features page.

Motivation

Additional details

Related issues and pull requests

[github-actions]

Preview URLs

• /en-US/docs/Mozilla/Firefox/Experimental_features
• /en-US/docs/Mozilla/Firefox/Releases/145

External URLs (3)

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

• https://bugzil.la/1924086 (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Mozilla/Firefox/Releases/145
Title: Firefox 145 release notes for developers (Beta)

• https://bugzil.la/1924086 (1 time) (Note! This may be a new URL 👀)
• https://bugzil.la/1988224 (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2025-10-24 16:28:21)

[bsmth]

Thank you!

[bsmth]

One last thing before merging, do you want to mention anything at the end of the Fx 145 note in the following para? A mention of the prop / link to the bug?

content/files/en-us/mozilla/firefox/releases/145/index.md

Lines 101 to 105 in f5f9244

	- **CSS anchor positioning** (Nightly): `layout.css.anchor-positioning.enabled`
	Nightly builds now support [CSS anchor positioning](/en-US/docs/Web/CSS/CSS_anchor_positioning) by default, which allows to tether elements together.
	The anchor-positioned elements can then have their size and position set relative to the size and location of the anchor elements to which they are bound.
	([Firefox bug 1988224](https://bugzil.la/1988224)).

[chrisdavidmills]

One last thing before merging, do you want to mention anything at the end of the Fx 145 note in the following para? A mention of the prop / link to the bug?

See my latest commit; does something like that work for you?

[bsmth]

See my latest commit; does something like that work for you?

Looks good, thanks!