Has Brandon made any statements (other than, maybe, the donation) that indicate what his beliefs are? I believe he may have apologized for causing pain to others based on his actions, but I've yet to read anything where he states what he actually believes about gays and their fight for marriage equality (other than, again, whatever the donation itself says). It'd be interesting (to me, at least) how he explains his donation and what he was trying to accomplish with it.
No, he hasn't. In fact he made a point of refusing to do so.
This is what happens when you get caught in the middle of a topic that pretty much has a 50/50 split on support/opposition. Mozilla has already stepped in shit. Every move from this point on just smears it around without actually cleaning it up.
I don't think the gay community will earn much acceptance if they attack heterosexuals on questionable grounds, I just feel sorry for those who had nothing to do with this.