JBL sounds like your audio gear, depends on what. Bluetooth, USB audio ot 3.5mm jack connections generally work fine without issue. (Installing PulseAudio Volume Control will help you with finer grained volume control). Some DACs that require custom Windows drivers might not work.

Gaming stuff, Steam will have you covered, Lutris, Heroic, or itch.io for non-Steam stuff. The one unintuitive thing you have to do once you log in is to go to Steam Settings and check the “Use Steam Play for All Titles”. Just like that, 75% of your library that only have a Windows version will suddenly be playable and you’ll hardly notice a difference: just Download then click Play, that’s it (maybe a bit slower launch time).

I would recommend Firefox or Librewolf over Chrome as you have done already, but you should know that Chrome and Chromium do work on Linux FYI.

On the contrary, I think this is a responsible way to operate. The terms of use apply to the Mozilla distributed binary, not the open source version and open source forks, and I don’t think additional terms shut them out of that. The privacy policy is clear, concise as can be and links so that people can jump directly to what is being collected.