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 understand that, but I’ve seen that language commonly used in nearly identical clauses before, and as far as I’m aware, the courts seem to interpret that as “to do the thing that’s required, or to make it more possible than otherwise,” rather than “anything they deem to be ‘helpful’”