So the true benefit (to the community) is about $50M +- 10%. Heck, let's double it and call it $100M.
The remaining expenses are fluff. In a corporation, one wouldn't be allowed to have non-essential expenses far exceed essential ones. In a non-profit, this philosophy needs doubling down on.
I might be completely wrong, but Mozilla seems to be subsidizing the whims of a corrupt few at the top.