How to Enter and Get Out of Firefox Safe Mode

Summary :

Mozilla Firefox, is a free web browser developed by Mozilla Foundation. When users encounter some problems with the browser, they might need to try to fix them in Firefox Safe Mode. But do you know how to enter and exit the Safe Mode? In this post, MiniTool Partition Wizard introduces you some ways.

Mozilla Firefox, or simply Firefox, is a popular web browser which was first released in 2002 by Mozilla Foundation. It provides a special Firefox mode named Safe Mode that can be used to troubleshoot and fix common problems you might encounter while using the browser, such as Firefox running slow, Firefox not responding, etc.

In the Firefox Safe mode, certain features like extensions, themes, and hardware acceleration will be disabled. Comparing with the normal mode, you might be able to know the reason why you receive errors.

Now, let’ see how to enter Safe Mode.

How to Start Firefox in Safe Mode

Method 1: Open Firefox in Safe Mode by Restarting

Step 1: In Firefox, click the Open menu icon from the upper right corner of Firefox.

Step 2: Click Help and select Restart with Add-ons Disabled.

Step 3: In the pop-up window, click Restart to confirm the operation.

Step 4: Wait for a while and you will receive a pop-up window. Just click Start in Safe Mode.

When Firefox opens, you should be in the Safe Mode.

Have you ever come across Firefox won’t open error? How did you fix it? To fix this issue, you need to know its possible causes. This post shares you with them.

Method 2: Open Firefox in Safe Mode with Keyboard Shortcut

Method 3: Open Firefox in Safe Mode by Running a Command

Step 3: In the box, input the command Firefox.exe -safe-mode.

Step 3: Click OK to open Firefox Safe Mode window.

Step 4: Click Start in Safe Mode in the Firefox Safe Mode window.

How to Get Out of Firefox Safe Mode

You just need to close the web browser and restart your PC to make sure it is completely ended. When you restarts your PC and launch Firefox, it should start in the normal mode.

If you still in Safe Mode, you need to right-click the Firefox shortcut on desktop and select Properties. Then delete the tail “-safe-mode” for the Target. And click Apply and OK to save the changes. Then restart the PC and run Firefox. You will get out of Firefox Safe Mode.

Tip: Administrator permission might be required after you click Apply, and you just need to click Continue.

Do you encounter the Firefox using too much memory error? This post will share you with possible causes of the error and several methods to fix the error.


Sherry has been a staff editor of MiniTool for a year. She has received rigorous training about computer and digital data in company. Her articles focus on solutions to various problems that many Windows users might encounter and she is excellent at disk partitioning.

She has a wide range of hobbies, including listening to music, playing video games, roller skating, reading, and so on. By the way, she is patient and serious.

Originally published at on November 1, 2020.