If you donate to the Mozilla Foundation, then by law that donation can only be used toward the non-profit activities of the Foundation. It cannot go toward Mozilla Corporation activities.
I’m not arguing the law, I’m arguing that Firefox should be a beneficiary of those donations. There is currently no way for anyone to donate to Mozilla for Firefox development, even though that is the main product that people derive value from.
To me, it seems like Mozilla Corporation should not have existed, and everything should have been part of the non-profit foundation.
IIRC if you write what something's for on a check in the memo/for line, it legally has to be used for that purpose for nonprofits, but I can't find a source and I doubt something like that would be a high-priority thing to audit for the IRS.
Donations go to the Mozilla Foundation, which largely does advocacy. The CEO works for the Mozilla Corporation, which makes far more money than the donations.
To me there seems there is something fundamentally wrong with the way Mozilla is set up.