Firefox is dependent on Google for funding, but not for source code. Brave is dependent on Google for source code, but not for funding. Safari is dependent on neither but Apple locks down the experience.
Hopefully Ladybird will deliver us from our Google dependence in a year or two. It's already usable for very light web browsing. I wrote this comment on Ladybird.
Google Chrome just exists to make Google money at your expense, to sell your data and deplete your battery.