This is how we got into this mess in the first place. Google was the "good guy", up against Microsoft and Apple, and funded Mozilla. After all, Google didn't care about web standards or building a browser! They were a search engine.
So Mozilla became dependent on Google, and here we are.
If Mozilla could stand alone and compete with the other big players, that'd be best. If they couldn't, then forming alliances with others, even former "enemies", would be 2nd best, and work towards independence.
Even Apple took MS money back in the day: seems to have worked out for Apple.
So Mozilla became dependent on Google, and here we are.