Last I heard, the IRS was investigating them for claiming deductions as a charitable foundation but funneling money to the Mozilla Corporation.
They've only recently started concentrating on paying developers to reduce the memory leaks, bloat etc after Chrome started eating their lunch in a big way.
How is this a poster child for a good way to develop good and useful software for the masses? In fact, it seems to exemplify the pitfalls and weakness in the model, if nothing else.