Stop Mozilla Firefox from Asking to Be the Default Browser Unlike Chrome, Firefox offers the option to disable the default browser prompt permanently. Once you enable this option, Firefox will never ask you to make it the default browser again. To use this option, launch Firefox and click the menu button in the top-right corner. It looks like three horizontal lines. Select “Options” from the menu. On Firefox’s Options screen, click “General” on the left. Deactivate the “Always check if Firefox is your default browser” option on the right. Firefox will stop asking to be your default.