, click help
and select . Firefox will start up with the Firefox Safe Mode dialog.You can also start Firefox in Safe Mode by holding down the [shift] key while starting Firefox.
You now have two options:
- Clicking the button will temporarily disable your extensions and themes, turn off hardware acceleration and reset toolbar and button customizations. When you leave Safe Mode and start Firefox up normally, your extensions, themes, and settings will return to the state they were in before you entered Safe Mode.
- Clicking the button will restore Firefox to its factory default state while saving your essential information.