Can't recommend Thunder enough, especially if you like a good compact mode/gesture-based UI. The devs are great and very responsive on the github repo, and the app just keeps getting better!
When was the last time you tried it? There have been hiccups a few times where Ublock needed to push an update, but (at least on my end) those issues have tended to resolve quickly
If YouTube is your only issue you could also just keep chrome around as a YouTube player and use Firefox for everything else - unless space is exceptionally tight on your system, a second browser isn't the worst thing to have on hand :)
Bahahah. Hard to choose a favorite scene but that was definitely a crowd pleaser in my showing