@Gargron @Jeremiah The for-profit corp is wholly controlled by the non-profit one.
Like the OP, I don't really agree with the CEO's salary (and would not donate for that reason), but Mozilla did increase their revenue considerably over that period. IIRC she has made arguments about her pay scale vs other IT executives that sounded plausible (the $6 mil is not her pay scale BTW; most of that was bonuses tied to the new revenue).
Caution: Brendan Eich has been grinding this axe loudly for years