Things you considered buying (This is sold to advertisers)
Your precise location (This is sold to advertisers)
Inferences about you (This is sold to advertisers)
Right before Mozilla acquired them, Fakespot updated their privacy policy to allow transfer of private data to any company that acquired them. (Previous Privacy Policy here. Search "merge" in both.)
People donate to Mozilla because they believe in the company's stated goals. Why were the donations put into an acquisition of a company with this kind of privacy policy? And why has Mozilla focused on bundling it as bloat into their browser? Now that Brave is in hot water for becoming bloated, Mozilla should buck the trend, not follow it.
Agree with everythint but just one thing. None of the donations are going into this side of Mozilla, this is Google money mostly (and some Pocket money too probably). You can only donate to their foundation and their activism, but not to any of their software projects (except Thunderbird but no idea how that works IANAL)