[maeln]

Mozilla Corporation is a for-profit company. Depending on the legislation it is sometimes forbidden to take donation, or at least very difficult/limited for company.

Mozilla Foundation is the non-profit organization (and they do take donation).

[Mountain_Skies]

They probably can take donations just fine but there is no tax deduction for the donor.

[throwawa66]

I'm going to start donating to Mozilla every month.