Hellom Here's how to set firefox as your default browser 1. In Firefox Open Firefox, then open menu, then go to settings, then go the the '''"general"''' tab inside settings, then click '''Make Default.''' 2. On the operating system (windows) Go to Settings > Apps > Default apps, find your browser, then set firefox as your default. 3. (Mac) Follow the first "in browser" method, then it may prompt you to select firefox in settings.