techiesphere.com pubic that:
the tweeter FirefoxCounter that the browser has officially registered over 1 billion downloads. The count includes all versions of the software dating back to its first release in 2004.
And mentioned that:
TechCrunch reported yesterday that Mozilla’s browser had passed 999 million downloads during the morning. It took just about 19 more hours to hit the 1 billion download milestone. As of about 8 a.m. ET until the 1 billionth download, the browser was being downloaded a remarkable 20 + times per second according to the Firefox Counter Twitter Account.
I recommend the article from Read Write Web, Good article where you can see why Firefox interprets the needs of Internet users.: The Future of Firefox: No Tabs, Built-in Ubiquity