Intent to Ship: CSS progress() function

[Sajid Anwar]

As of Firefox 155, I intend to turn the CSS progress() function on by default on all platforms. This was developed behind the layout.css.progress-function.enabled preference.

This feature originally shipped in Chrome 138 and Safari 26, but the specification was recently updated to include an optional no-clamp keyword. This new keyword is supported by Gecko, and is under development in WebKit (available in Safari Technology Preview 248); Blink development status is unknown.

Bugs:

- Bug 1975530 - [css-values-5] Implement "progress()" function syntax

- Bug 2047345 - Set layout.css.progress-function.enabled for all users

Standard:

https://drafts.csswg.org/css-values-5/#progress

Intent to Prototype Thread:

https://groups.google.com/a/mozilla.org/g/dev-platform/c/giHoV_7PxfY