> Perhaps he believes that the state should remove all recognition of marriage...
Just a heads-up, this is a strawman developed by anti-same-sex-marriage proponents to provide a possible (though not plausible) reason other than denying people their rights why someone might oppose same-sex marriage (and you also have to buy that someone who wanted to grant same-sex couples those legal right would vote/donate/campaign/etc to deny them).
If you're going to assert it, you need to have specific evidence that the individual in question actually believes that.
I used the modifier "perhaps", which was followed by acknowledgment that we don't know his beliefs (because he won't talk about them except in person.)
Brendan is (or was at the time of donation) ignorant, there's no sense in disputing that. I'm just tired of people labelling him as anti-gay, bigot, homophobe, etc.
All we know is that he donated $1000 to reaffirm, in law, that marriage can only be between a man and a woman.
Perhaps he believes that the state should remove all recognition of marriage and just recognize civil unions going forward for everyone with the benefits from marriage.
We don't know, because he hasn't talked about his beliefs. And honestly, I don't believe they're that important when Mozilla has reaffirmed their strive for equality.