

Not an expert but as I’ve understood it it’s pretty similar to Fennec, less tracking and more private than your regular Firefox. I don’t know anything about either ones development team size or activity either so I can’t recommend one over the other. Hopefully someone with more knowledge can chime in.
Which I think is kinda weird decision since they could’ve just hidden a setting that unlocks all addons in the options. But maybe they were so incompatible at the time that it wasn’t worth the headache.