[1] https://stateof.mozilla.org/pdf/Mozilla%20Fdn%202024%20-%20A...
They're an NGO, you can just... look this up, it's public.
The last I heard was that the Google rev-share agreement was on the skids and they stopped developing projects like Thunderbird and Fake Spotter because they were capital constrained.
If you know otherwise then you're better informed than I am I guess
While I agree with the general point that non-profit donors have a legitimate interest in the use of funds, in the particular case of the Mozilla Foundation, I believe the vast majority of that money is from placement fees Google paid to be the default search engine in Firefox. As the pay-for-placement market has evolved and Firefox's browser share has fallen, this income has also fallen dramatically.
On the general point about non-profit donations, legally non-profit's use of funds are governed by their board of directors and charter, which often are not constrained in ways donors may assume, hence the need for due diligence prior to giving.
Most of program service revenue was from Mozilla Corporation. They paid Mozilla Foundation a small part of their revenue for trademark licenses, legal services, and so. And most of Mozilla Corporation's revenue was from Google.
[1] https://stateof.mozilla.org/pdf/Mozilla%20Foundation_Form_99...