"The open source browser Firefox has surpassed four million
downloads in just over a week according to the spreadfirefox.com
"Up until yesterday the total number of downloads of the browser
stood at 4,275,712. We can expect the number to surpass five
million sometime today. Downloads of the Firefox browser have
steadily grown with each point release, having doubled from 3
million for version 0.8 to 6 million for version 0.9..."