Mozilla Firefox is a free, open-source web browser available for both Windows and Mac operating systems. Known for its speed, security, and user-friendly design, it features a clean interface, customizable options, and robust privacy settings. With frequent updates and a wide selection of extensions, Firefox delivers a dependable browsing experience across various devices. Initially launched as Phoenix, the browser was later renamed Firebird, and then Firefox, to avoid trademark conflicts. Today, it remains one of the most widely used browsers on Windows 11, 10, 8.1, 8, 7, as well as on Mac, Linux, and mobile devices.

Key advantages of Mozilla Firefox include enhanced download protection, process isolation, and tailored customization options. Its colorful yet simple theme, with minimal menus, makes it easy to navigate. Firefox is known for its impressive speed and low resource usage, and it is considered one of the most secure browsers, as recognized by the German Federal Office for Information Security.