You can't donate to Firefox anyway—you can only donate to the Mozilla Foundation, which isn't alowed to work on Firefox. The Mozilla Corporation owns Firefox, and money can only flow from the Corporation to the Foundation.
So every donation that has ever been made to "Firefox" has actually gone to whatever random stuff the Foundation is working on this week and, yes, to the Foundation's CEO.
So every donation that has ever been made to "Firefox" has actually gone to whatever random stuff the Foundation is working on this week and, yes, to the Foundation's CEO.