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 agree that politicians are idiots but we’re not talking about politicians.
And even if we were, the case law around privacy pales in comparison to copyright law.
There is no reason why a browser that sits on devices under my control requires me to give an unrestricted license to the software maintainer.
If Mozilla wishes to bundle their AI slop and issue a separate license for that where I can disagree to my use of it, that would be one thing. But the TOS, as currently written, allows for any use of my data.