It should be possible and when Firefox will use Git fully instead of only as a git mirror it will be quite easy to do. You can the repository containing all patches here: https://github.com/Thaodan/gecko-dev/tree/thaodan/release/127.x
The patches just have to be rebased against developer or nightly.
Pinned Comments
Thaodan commented on 2021-04-20 17:40 (UTC) (edited on 2021-04-21 22:45 (UTC) by Thaodan)
If you have issues with this package visit gitlab and read the readme first.