Not the parent poster, but I'll provide https://assets.mozilla.net/annualreport/2018/mozilla-2018-fo... (page 52) as accompanying evidence specifically for the $2.5M claim. Mitchell Baker's compensation totalled $2.48M in 2018, with the second-highest-paid executive, Mark Surman, making only $322k.

That page does note that Baker was "paid only by related for-profit" - but at best that introduces a conflict of interest.

As I've never been at Mozilla, I can't confirm any of the other details. And I'll say that any large-scale technology company needs to strike a balance between product focus and the degree to which it controls the conversation around its space, and Mozilla's investment in things like Rust will have a lasting positive impact on the software engineering discipline. But it's also clear that the environment was toxic enough to make at least one person (the parent poster) feel this way, and that itself is a yellow flag.