if it was pure theater my friends and family who pay for all their streaming services would be able to share the content without permission from Netflix, Hulu, etc. That this is not the case disproves your claim that it’s pure theater. It does exactly what it aims to do and that’s raising the barrier to entry for piracy.
100% agree.
If its not open source 1) you can’t fully trust/audit. and 2) you’ll be left in the dust should the company cease to exist as nobody can continue development.
If Firefox is not private enough use Librewolf. If you’re interested in something new and exciting give Zen Browser or Floorp (both based on Firefox) a spin.