Warning to all Brave Browser Users
Blocking variations.brave.com which is used for A/B testing could potentially break Brave’s functionalities. For me did Brave’s “forgetful browsing” feature broke which seems to be disabled by default if you block this domain.
You are fingerprintable either way unless you go all out. Going full on Arkenfox/Librewolf mode (with all settings enabled that decrease convenience) you can at most fool naive fingerprinting. For the more advanced one you need Tor.
And even for naive fingerprinting, unless you use Tor or a VPN (which you would have to trust) your IP alone + the fact that you use FF (which a few % of people worldwide do) along with some other basic info about your PC will make you very unique.
A good VPN is a must of course.