One’s the biggest advertising company the world has ever seen that hoovers up personal data like there’s no tomorrow. The other one is almost completely funded by said advertising company and has shown multiple times that they will put their profits over the users' wishes including but not limited to adding ads directly to the browser.
The ones that do make these decisions profit from it. That the leadership keeps increasing their income to eat up Mozilla's profits instead of building up an endowment to eventually gain independence of Google is another issue and definitely not something to be proud of.
¯\_(ツ)_/¯