How to start Firefox in Safe Mode.

Updated: 01/24/2018 by Computer Hope

FirefoxTo start Mozilla Firefox in Safe Mode follow the steps below.

  1. Find the Firefox icon or click Start and type Firefox.
  2. Hold down the Shift key on the keyboard and then click the Firefox icon.
  3. In the Firefox Safe Mode window, click on the Start in Safe Mode option.

Firefox Safe Mode

Note: If Firefox cannot start in Safe Mode then repeat the above steps and instead of starting in Safe mode choose the option to Reset Firefox to reset all settings back to default settings.

Additional information