I agree with the person you're responding to. Decades of funding and they have zero savings to show for it.
Though it's questionable as to how much big players like Google would have continued to fund Mozilla if they had seen Mozilla making the financial moves that would have made it an independent and self-sufficient entity.
Look at how much money Google gave to Apple (Safari) vs Mozilla (FireFox) per year.
The CEO has unarguable been doing a poor job. Losing market share has lost them more potential revenue than any of their pet projects raised.
That's plenty of money if they recognize they need a super lean company with 0 bloat and a few highly paid experts who focus on correctness and not bullshit features.