the most useful extensions for android firefox - ublock origin, there is already (and many more). Also, mozilla is working on bringing all desktop add-ons to mobile and everyone can contribute.
don’t recommend manjaro. instead - vanilla arch or endeavour os
It’s funny that recently NetworkChuck uploaded video about darkweb where he installed tor on windows and now apparently many folks did the same.
Music scrobbling solves that issue for me. Navidrome integrates well with for example last.fm. In addition to having my music listening history there one can find recommendations based on their music taste