Yes about that new Firefox for Android, after having tested it myself, some features are missing for me but I’ll certainly have to go with it, sooner or later, to be able to continue posting here:
Violentmonkey extension- Stylus extension
WebDev tools (for userscript authoring and more)- Copy link text context menu (to edit MB 10 times faster)
- Being able to use Discourse (read/write).