Publicly-disclosed (by legal mandate) financial sponsorship of a public advocacy campaign on a public policy matter is about as far as you can be from a “private matter”.
> Could have sworn there was some BDSM stuff involved as well.
Well, not with Eich. I don't think there was another short-term Mozilla CEO ousted among public controversy.
ISTR participation in Gor fandom being brought up alongside sexual harassment/abuse claims for a prominent community figure (maybe Jacob Applebaum? I thought it was him, but I don't see that element mentioned in any of the articles on him, so it may have been someone else) but I don't remember that or consensual BDSM related activity being the central concern in any ouster.
EDIT: As a sibling comment suggest, the Gor issue was with Larry Garfield.