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How to Uninstall Mozilla Firefox Completely on Window 10

Can't reinstall your Mozilla Firefox? No matter how many times you have tried, it doesn't work at all. In this case, you need to uninstall Firefox completely on Windows 10 for the first step. Just follow the several steps easily to get rid of the issue.

Completely Uninstall Mozilla Firefox on Windows 10

In the past, you might have removed Firefox directly from the control panel, but there are many configuration files that store your personal information on your computer. So, let's complete the steps to uninstall Firefox.

Step 1: Remove Firefox with its built-in uninstall application

1. Right-click on the Mozilla Firefox icon from the desktop, select the Open file location to find out uninstall folder. Or you can navigate to the directory below.

C:\Program Files\Mozilla Firefox\uninstall

open mozilla firefox file location

2. Open Uninstall folder, double-click on helper application. Here will pop-up a window, follow the guidance to uninstall Firefox. Click on Finished to exit.

through helper application to uninstall firefox

Tips: You can also uninstall Firefox totally from Control Panel, here is the tutorial below.

1. Type Control Panel in the search box on the taskbar and hit Enter.

2. Navigate to Programs > Programs and Features, select Firefox program then click on uninstall. The wizard will guide you to remove it. Restart your computer.

uninstall mozilla firefox throurh control panel

Step 2: Delete the configuration files of Mozilla Firefox

All changes you have made in Firefox, for instance, bookmarks, homepage, password, are stored in the configuration files. These files are kept separate to the program file. Therefore, even if you uninstall Firefox, they may remain on your computer. Open the folder directory below to delete the configuration files.

Note: When you delete the Mozilla Firefox above, it will show you a prompt of "you need administrator permission", click Continue button to delete.

Step 3: Remove Mozilla Firefox through the Registry Editor

1. Hit Windows + R key to open Run window, input "regedit" and Enter.

run regedit to open registry

2.At the top of the page, click on Edit and select Find. Input Mozilla and Firefox and Enter to show the keys values or data.

find out all options about firefox

3. Right-click and Delete the file have found, then click Edit > Find Next, or click F3 to locate the next one.

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