From the New York Times:
FIREFOX is a classic overnight success, many years in the making.
Published by the Mozilla Foundation, a nonprofit group supporting open-source software that draws upon the skills of hundreds of volunteer programmers, Firefox is a Web browser that is fast and filled with features that Microsoft’s stodgy Internet Explorer lacks. Firefox installs in a snap, and it’s free.
Firefox 1.0 was released on Nov. 9. Just over a month later, the foundation celebrated a remarkable milestone: 10 million downloads. Donations from Firefox’s appreciative fans paid for a two-page advertisement in The New York Times on Thursday.