Mozilla Firefox, also known as just Firefox, is a free and open-source web browser developed by the Mozilla Foundation. However, there are plenty of other terms to refer to the popular browser. Some people simply shorten it to Firefox or FF. Apple users may refer to it as Firefox for Mac, while Microsoft users may call it Firefox for Windows. Other synonyms include Firefox Quantum, Firefox Developer Edition, and Firefox Nightly. Some may also refer to it as the Mozilla Firefox browser or simply the Firefox web browser. Regardless of the terminology used, Firefox remains one of the most widely used and respected web browsers available today.