What internet browser do you use?

Seriously, what's up with all the Brave ads?
How do they make money by people using their browser and spending so much on ads, its facebook, youtube videos, google apps etc
It might just be the paranoic me, but I have barely seen any firefox ads in 15 plus years of IT, it just makes me suspicious

But I use Firefox for personal usage and Chrome due work, some google sheets etc, some fancy stuff on Chrome tbh.
I feel edge is the fastest, but maybe because the profile isn't bloated with addons/history/cache etc, its my resort when a site is broken due some JS script