What makes firefox better than brave?
Says who? It's opensource and has a BSD license, you can literally do whatever you want with it.
I like that it quarantines most of Facebook's shenanigans with cookies and the like.
I can't compare Brave's adblock to uBlock Origin, but it's probably good enough.
I swear people slating Brave here haven't actually even installed it.
Oh and its opensource, not like theres anything hiding in the shadows here, you can go and look at the code behind how its all working for yourself if you're that paranoid.