The Firefox browser by the Mozilla Corporation has been around since November 2004 and finds itself as one of the more favored, established web browsers. The browser is free and open-source which is managed on a day to day basis by Mozilla with recent estimates showing that it is the second most widely used internet browser, totaling approximately 25% of worldwide usage.
If you're a Firefox user then you now have a new version to download, with the popular browser being updated to version 10.