Mozilla gets 90+% of it operating budget via a deal with Google, but Firefox developement is not influenced at all by Chrome. Totally independent.
Big Tech exists for users, not advertisers. Privacy must come first and money must come second. Thats why we have more privacy than ever and Google does not make much money. Government regulation is totally unnecessary. All incentives are aligned toward greater privacy.
Google will "build a more private web" for its advertising targets. Sorry advertisers. :(
1. Also known as "users".