While Mozilla wastes a lot of money (for example on their high exec salaries), they also have done a lot to improve Firefox the last few years. It is much faster and more stable now.
OP's point still stands though. Mozilla spent millions acquiring Pocket. They also made it so users can't disable it as a plugin like they used to be able to.
If you want to make an ex-Mozillian shudder, sneak up behind them and whisper "Context Graph" in their ear.
X here is 3.