Looks like I was a little out of date.

https://itsfoss.com/news/mozilla-lifeline-is-safe/

Google pays Mozilla, basically to make Google the default search engine for everything in Firefox. Previously, it looked like an antitrust case was going to force them to stop doing that, but it didn't turn out that way.

Mozilla is still getting most of their money from Google and they shouldn't need to kneecap themselves to pay the rent. Still, you can't help but wonder what might happen if Firefox starts eating too much of Chrome's market share. Mozilla should be trying to branch out, but in a user friendly way.