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.
Seriously Firefox include many services, specifying the TOS for the entire browser is stupid.
What is worse is that people are asking for clarification and there is no response from Mozilla:
https://github.com/mozilla/bedrock/commit/d459addab846d8144b61939b7f4310eb80c5470e