How to start Firefox in Safe Mode with Add-ons disabled

If your Firefox crashes frequently, then starting Firefox in safe mode is a good way to troubleshoot Firefox issues, before you decide to reset Firefox settings. Today we will see, four ways to start Firefox in safe mode in Windows 10/8/7, with Add-ons disabled.

Start Firefox in Safe Mode

1] Using UI

Open Firefox browser, click on Settings button in the top right corner. Next click on the small blue circular question mark sign. The following menu will open.

restart with add-ons disabled

Select Restart with Add-ons disabled. You will be asked if you are sure.


Click Restart. And you will see the following message box.

start Firefox in Safe Mode

You need to select Start in Safe Mode.

Firefox will start in safe mode with all add-ons disabled.

2] Using Key

You can also press the Shift key and click on the Firefox icon to start it in safe mode. You will see the same two message boxes displayed above.

3] Using Run box

In Windows 10, from the WinX Menu, open the Run box, type the following and press Enter key:

firefox -safe-mode

You will see the same two message boxes displayed above – before the browser opens in safe mode.

4] Launch Firefox in safe mode using command line

Start Firefox in safe mode command line

Open a command prompt windows, type the following and hit Enter:

“C:\Program Files (x86)\Mozilla Firefox\firefox.exe” -safe-mode

You will see the same two message boxes displayed above, and Firefox will start in safe mode.

Firefox stuck is safe mode

If your Firefox in stuck in safe mode and keeps opening in safe mode, then it is quite possible that the firefox.exe process may not have exited. You can kill it using the Task Manager or your can restart your Windows PC. This is known to help.

IE users may want to check out how to run Internet Explorer in No Addons mode.

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Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.