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.
Most of what I put in my comment was there beforehand. (most of it was the Privacy Notice, not the brand-new Terms of Use)
I simply wanted to cover as much as possible since I figured most people hadn’t read the whole document. Apologies if it seemed like everything I was covering was brand new.
To be fair though, not all of it is necessary, but it does provide a benefit such that most companies will use it because it keeps things from getting too ambiguous, legally speaking. Most of the changes Mozilla made seem to just be clarifying existing things that should generally be obvious, to ensure that any frivolous legal argument against them is very clearly able to be dismissed.