added exprimental note about from keyword

[dletorey]

Description

Added experimental note for from keyword for relative colors

Motivation

Working on #33082

Related issues and pull requests

https://bugzilla.mozilla.org/show_bug.cgi?id=1889133

[github-actions]

Preview URLs

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

Flaws (2)

URL: /en-US/docs/Mozilla/Firefox/Experimental_features
Title: Experimental features in Firefox
Flaw count: 2

• macros:
  • Wrong xref macro used (consider changing which macro you use). Error processing path /en-US/Add-ons/WebExtensions
  • /en-US/Add-ons/Themes does not exist

External URLs (1)

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

• https://bugzil.la/1889133 (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2024-05-13 10:35:32)

[bsmth]

What do you think about this?

Suggested change

	The `from` keyword is now parsed by firefox, behind a flag, this allows the work for [relative colors](/en-US/docs/Web/CSS/CSS_colors/Relative_colors) to proceed.
	Currently this has no effect, but with out this the relative colors work can not proceed. (See [Firefox bug 1889133](https://bugzil.la/1889133) for more details.)
	The `from` keyword is now parsed as valid CSS syntax when the `layout.css.relative-color-syntax.enabled` preference is set to `true`.
	This keyword currently has no effect but will not produce syntax errors when used in valid places in CSS color functions, allowing the work for [relative colors](/en-US/docs/Web/CSS/CSS_colors/Relative_colors) to proceed.
	See [Firefox bug 1889133](https://bugzil.la/1889133) for more details.

[bsmth]

One suggestion for you, but looking good! Leaving a +1 for when you have a chance to have a look 👀

[bsmth]

Going to merge and open a small follow-up patch! Thanks a lot 🙏🏻