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.
Gee whizz, like what? What “basic” functionality is missing that can only be solved with a ToS saying they’re going to track how I use their browser?
That’s what I needed to see. So it’s not missing basic functionality, they just want to make it legal to track your browser usage.