I'm surprised people believe it is so bad to spend on salaries. Contrary to startups and traded companies, Mozilla has no stock to inflate compensation, so they have to pay large salaries.
Which is why Mozilla exec leadership is still in place after a decade of losing market share to Chrome and flailing about trying to find a business model that works. Firing 25% of your company is a huge sign you fucked up. No shareholders, and only vague accountability to stakeholders. Moz Foundation board should fire her, though since she's chairman she has absolutely zero oversight.
In the 2+ years I've been at Mozilla, I think there's been almost complete turnover at the C-level.
For example, Chris Beard was CEO of Mozilla from 2014 through late 2019.
There's a frequent sentiment in these comment threads that Mozilla leadership is failing and facing no professional consequences, but I think that sentiment is misplaced.