CHROME (google) is planing to implement DRM (kinda) into their browser
looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
You can't legally donate to Firefox, as it is developed by a Corp (Mozilla Corp.). Donations go to Mozilla Foundation, which does... other things with you money.
In other words, your money don't go towards FF development.
I believe under US laws, it's the opposite. The more donations a nonprofit receives, the more money it can earn though for-profit subsidiaries. I.e. the more donations, the more money the foundation can take out of the corporation.
Ofc both are interested in a sustainable relationship though.