It isn't just software: https://support.mozilla.org/en-US/kb/access-mozilla-services...

I will maintain it is an issue of clarity. Your argument is that Mozilla isn't offering online services but this isn't true and clarifying what actions upload information and exactly how that information would be used would mollify this. The list would probably be quite extensive. Moreover, the clause doesn't necessarily give them a license to all information input through firefox and that clarification should be demanded of them.