Mozilla is not the same as Firefox, unfortunately. If I remember correctly Mozilla itself is relatively flush with money (through a deal they have with Google) and doesn't really need the money. Their chair is paid extremely well, in any case [1].
A lot of Mozilla's money seems to be spent on executive pay, overhead, and questionable side projects. Not so much (or not enough) on browser development, it seems. I'd MUCH prefer Firefox to be a product organization with its own budget and perhaps a yearly contribution from Mozilla. I have more faith in Firefox than in Mozilla.