I’m using Mull but am going to switch to Fennec with arkenfox hardening and ublock enabled in the future.
IMO don’t use too many privacy plugins like ublock, privacy badger and jshelter. Ublock can also block individual scripts in expert mode and therefore reduce your fingerprint to a minimum. Additionally more extensions also mean more consumed ressources.
I would also reccommend a secure dns filter like nextdns or the one from mullwad. I use Rethink dns for the configuration. https://www.f-droid.org/en/packages/com.celzero.bravedns/
Here is a site from Germany that handles many privacy topics and has a section for dns servers: https://www.kuketz-blog.de/empfehlungsecke/#dns
Great news and loving that they are able to update faster to newer versions.
Custom roms vs. stock Android are like Linux vs. Windows. Without them, the devices would not be as usable and powerful as they can be.
A huge Shoutout to the countless maintainers that make it possible!!!