But to answer your irrelevant question, California law would probably not consider Mozilla putting user data on to Mozilla's public bug tracker to be a sale of user data because California's definition of "sale" requires Mozilla to be getting something of value in return, but Mozilla's public bug tracker is free for anyone to access.
Consideration is the word used, and it has a specific meaning which involves a contract between two parties. I'm not at all sure how that can be mapped onto "using the data to improve our own product", and you're just vaguely insinuating that it might without any evidence.
> "hey, I need to collect data from your system, and said data will be shared with everyone else publicly in our bug tracker"