From the new terms:
When you upload or input information through Firefox, you hereby grant us a nonexclusive, royalty-free, worldwide license to use that information to help you navigate, experience, and interact with online content as you indicate with your use of Firefox.
I’m paying for a search engine subscription, do I have to pay for a browser too?
Honestly, if it was actually economically viable and made all bullshit go away, I’d happily pay for a browser.
I don’t think Mozilla could switch to that model without significant restructuring the likes of which they’ve little inventive to go for.