Mozilla Firefox Challenge. Individual Action. Global Impact. We have brought together thousands of people to build a better Web. Not for profit, but for good. This holiday season helps us take it one step further. Donate to a celebrity cause, join their team or fundraise for your own favorite charity. Win prizes and do good for the world. We are giving a $25,000 bonus donation to the cause that raises the most. It does not have to be a celebrity cause. Could be yours!