As Microsoft started bundling Internet Explorer with its Windows operating system, the software giant's browser managed to capture 90-95% of the market, and to many casual PC users, Internet Explorer was the Internet.
Firefox was originally designed as a less bloaty version of the Mozilla browser, an open-source project based on Netscape's Communicator suite. Version 1.0 of Firefox arrived on November 9, 2004 and was the first browser in a long time to really challenge the then dominant Internet Explorer 6.
The launch of Google's Chrome browser in September 2008 spoiled Mozilla's party though, Chrome and Firefox are currently battling for the second spot in the browser market.