The big question is:
Does the money go to Firefox or to funny projects and (what I consider) insane exec salaries?
Yes, Mozilla (.org) is a non-profit, and Mozilla (.com) is a regular corporation. Yes, Mozilla has commitments about transparency. Yes, exec salaries are insane.
Do folks who ask this question scrutinize every purchase or business they make to this degree? In the laundry list of entertainment, learning, and professional subscriptions, what portion of spotify, github, or other popular subs end up contributing to just the feature or service you like as opposed to the entire organization and other initiatives that the organization supports?
We already know that Google, Microsoft, Apple, Facebook and Oracle are evil.
(And to pre-empt that: I'm not saying you can't criticise results. I'm saying that focusing on exec pay rather than on results feels misdirected.)
I think we both agree on this. What they pay their execs is irrelevant. What I'm saying is, I'm not buying peanut butter, it's available for free. I am considering donating money for the peanut butter I already get for free, but the grocery conglomerate that accepts donations on behalf has already fired half the peanut farmers, and discontinued the Crunchy variety that I really liked.