From the man who is driving Ubuntu, the most successful Linux distribution, in an article he just published, Playing nicely with Windows:

Firefox, for example, is an inspiring free software success story, and I’m certain that a key driver of that success is their excellent support for the Windows environment. It’s a quick download and an easy install that Just Works, after which people can actually FEEL that free software delivers an innovative and powerful browsing experience that is plainly better than the proprietary alternatives.

Thanks, Mark!

Thanks to Erwan for the link!