Firefox focus gave me a 93% while fennec gave me a 91%. I run ControlD as a DoH provider that is suposed to block ads, trackers, malware, and big social (X, spybook, instabully, etc). I am also running ublock origin in fennec.
Edit: damn, adding privacy badger took it from 91% to 96%.
Edit 2: ouch
Fennec + privacy badger 39%
Fennec + privacy badger + ublock 87%
Fennec + privacy badger + ublock + Controld DNS 96%