If the Mozilla foundation creates a donation button with the condition that the money goes solely to browser development (no CEO salary or political activism) I will donate.
Except that it's well-known fact that none of your donations for the foundation ever go anywhere near Firefox itself, since Firefox is spun off as their commercial sector to accept Google's money
It's like email. You need to get people over the mental hump. But then if you offer a good product, buyers will be happy they got over it.