Google is paying Apple 20 billion per year in their search deal, which is 40 times more than what Mozilla takes.
Safari is funded ENTIRELY by Google's ads, also making a profit, and this is a fact. We can entertain a counterfactual, maybe Safari would still be funded without Google funding it with billions, but that's not the world we live in today.
And given Apple's reluctance to advance the web, going against their other cash cows, it's disingenuous to suggest otherwise. I recommend reading this opinion: https://infrequently.org/2022/06/apple-is-not-defending-brow...