FF141 WebGPU API supported on Windows except in serviceworker - relnote/experimental features

[hamishwillee]

FF142 adds support for WebGPU API on Windows (only) in workers except for service workers.
This adds a release note. It also updates the Experimental features with the caveats and the new preference for enabling service workers.

Related docs work can be tracked in #40473

[github-actions]

Preview URLs

• /en-US/docs/Mozilla/Firefox/Experimental_features
• /en-US/docs/Mozilla/Firefox/Releases/141

External URLs (4)

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

• https://bugzil.la/1602129 (1 time) (Note! This may be a new URL 👀)
• https://en.wikipedia.org/wiki/Graphics_Processing_Unit (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Mozilla/Firefox/Releases/141
Title: Firefox 141 for developers

• https://bugzil.la/1972486 (1 time) (Note! This may be a new URL 👀)
• https://en.wikipedia.org/wiki/Graphics_Processing_Unit (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2025-07-25 00:31:34)

[github-actions]

This pull request has merge conflicts that must be resolved before it can be merged.

[mathewhodson]

WebGPU was enabled for Firefox 141 in https://bugzilla.mozilla.org/show_bug.cgi?id=1972486
For Windows, it is enabled in all channels including beta and Developer Edition.

[hamishwillee]

I wasn't sure quite how to represent this. IMO something is supported when it works on all expected platforms. That is not the case here.
So I have updated such at it is only supported on Nightly (on all platforms). Then added the Yes caveat for Windows on the other releases. Finally updated the version added to 141 which makes this all true in version 141 - the fact that this was also enabled in some way in earlier versions is really kind of irrelevant now.

[hamishwillee]

Thanks @mathewhodson . Fixed.

[pepelsbey]

Looks good! Thank you :)