The extensions are in addition to their own included ad and other nuisance blocking features. I've been testing migrating from Firefox to Brave Origin (the paid fork with no crypto features that has a free linux build) and it works pretty well without any extensions.

Yesterday I wanted to get a brave search api key on the free tier and they require a credit card even for that. That pissed me off a bit but still gonna test the browser a little bit more. Firefox is really pissing me off and I don't want to keep using it forever just because there is no other browser engine. Can't wait for Ladybird to become usable.