Sometimes abbreviated as FF. This refers to Firefox - a popular software or web browser used for viewing websites on the Internet. The first version of Firefox was developed by Mozilla and released on November 9, 2004. At that time it was the next generation of browsers. It quickly gained popularity as an alternative to Microsoft Internet Explorer due to its stability and ad-blocking features.

Another advantage is protection against spyware. Firefox is developed by Mozilla Corporation, a subsidiary of the Mozilla Foundation, a non-profit organization dedicated to open source programming standards. Firefox was created in 2002 under the codename "Phoenix". It was then included in Mozilla's application bundle.

Professional users testing this phase of the beta found that it outperformed Microsoft's Internet Explorer 6 browser in terms of speed, security, and add-ons. After its official release, Firefox quickly began to erode Internet Explorer's dominance. Firefox was downloaded 6 billion times in just 9 months. In some ways, Firefox is the ideal successor to the first successful browser, Netscape Navigator. Netscape was developed in 1998 by the founders of Mozilla.

Firefox usage peaked in November 2009 at 32.21%. At the time, Firefox 3.5 had more users than Internet Explorer 7. After that, Firefox's popularity began to decline with the advent of Google Chrome. According to Statcounter last July, Firefox's usage rate was 5.96%. According to rankings, it is the fourth most popular browser. Google Chrome (63.32%), Safari (13.13%) and Microsoft Edge (10.75%) lead the way. Mozilla Firefox currently ranks fourth among all operating systems (3.04%).