[BrendanEich]

None of the donations to the parent Mozilla Foundation pay for Firefox development. This is a common misconception, Mozilla's own fund-raising makes it more common than it would be if they were explicit in stating where donations go and what they fund and do not fund.

[hysan]

That’s good to know. Thanks for clearing that up for me. Is it possible to donate directly to Firefox?

[BrendanEich]

No, not as far as I know. And definitely no tax-deductible way to do it.