This isn't a mystery. Mozilla accept donations. It isn't an ordinary for-profit corporation.
Yes, they separate Mozilla Corporation from Mozilla Foundation, but the point stands. If Mozilla are going to claim to make browsers, apps, code and tools that put people before profit, [0] they should expect backlash when they lay off engineers while continuing to overpay their leadership, despite continuing poor outcomes under their stewardship. [1]
This all contributes to create a very toxic subject that I generally tend to avoid, but I think that it's fair at this point to question Mozilla's execs results at this point. These past few years have been pretty brutal for Mozilla, and there's no clear path ahead from where I stand.
The only comment mentioning her gender was someone defending her, you're pulling hair here