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Remove a second firefox installation on Windows 10 without reinstalling

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I find I have two copies of Firefox, in both the Program Files and Program Files (x86) folders. Both of them are 64-bit however, and there is only one entry in Programs and Features.

How do I remove one of these copies cleanly? The only problem it causes is that firefox appears twice on the default browser settings page, which is annoying.

Réiteach roghnaithe

OK, I can't do it without a reinstall. Thanks for the help anyway

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All Replies (4)

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The first step is to determine what Firefox program you are using. It is possible both are in use. Right-click on the Firefox shortcut and select Open File Location.


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I can use either, that's not a problem. I prefer to use the one in Program Files, but my shortcuts and default currently point to Program Files (x86). They are both at the same version.

I didn't really want just delete the folder as it might not clean up properly. I can easily switch the 'Program Files' one to using the correct profile


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Let’s do a full clean re-install;

Note: Firefox comes in three or more folders on all computers. They are;

Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And two folders in the profile of each user on the computer for each Firefox profile for that user.

If you remove the Firefox folder, the user profiles would not be affected.

Download Firefox For All languages And Systems {web link}

Firefox ESR; Extended Support Release {web link}

Beta, Developer, Nightly versions

Install Older Version Of Firefox {web link}

Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86) Note: Check Both Folders

Mac: Open the "Applications" folder.

Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux;

If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. ++++++++++++++++++++++++++++ Look for, and remove any Mozilla or Firefox program folders. Do not remove the Mozilla Thunderbird folder if there is one.

Do Not remove any profile folders.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again.

How to Start all Computers in Safe Mode; {web link} Free Online Encyclopedia


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Réiteach Roghnaithe

OK, I can't do it without a reinstall. Thanks for the help anyway


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