This the best way to uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. Then run it again and click the button that says Cleanup System Files.
This error is caused by a problem with Firefox program files. The solution is to remove the Firefox program and then reinstall Firefox. (This will not remove your passwords, bookmarks or other user data and settings which are stored in a separate profiles folder.) Uninstall Firefox.
First, open Mozilla Firefox. In the address bar, type about:profiles and hit Enter (or Return on Mac). On the “About Profiles” page that opens, locate the box labeled “Restart” in the upper-right corner. To restart the browser while keeping all your open tabs, click “Restart Normally.”
Firefox would normally be installed in one of these locations: (64-bit Firefox) “C:\Program Files\Mozilla Firefox\” (32-bit Firefox) “C:\Program Files (x86)\Mozilla Firefox\”
What is Firefox.exe? Every one knowns firefox.exe is an executable file for the firefox browser. This belongs to mozilla.org. Since it is a very popular browser, some hackers or programmmers write virus programs to spread infectons via intrenet. It is generaly stored in C:\program files.
In the Control Panel window, click the Uninstall a program link under the Programs section. From the list of currently installed programs, select Mozilla Firefox. To begin the uninstall, click the Uninstall button at the top of the list. The Mozilla Firefox Uninstall window will open.
To keep your personal data intact, leave the box next to “Remove My Firefox Personal Data and Customization” unchecked when removing Firefox. Your bookmarks should automatically show up after reinstalling Firefox.
Try a clean install
If crashes are preventing you from starting Firefox, even in Firefox Safe Mode, a clean install will often fix the problem. Will I lose my bookmarks, passwords and add-ons? A clean install will not delete your bookmarks, saved passwords, add-ons or other personal information.
Refreshing Firefox will move that information to a new profile folder dubbed ‘Old Firefox Data’ on the desktop. This folder is a back up of all your Firefox data, and you can either delete it or manually restore the data by copying files between the new and old profile folders.
The refresh button allows you to see recent content updates on the app without having to download a new version of the app. When an app administrator publishes updates to their app, users must refresh their app to see the updates. This is done through a small refresh button in the top right corner of the home screen.
You need the new profile name to match the old one in order for Firefox to regain use of your extensions and their data. Inside Firefox, type or paste about:profiles in the address bar and press Enter/Return to load it. Click the “Create a New Profile” button, then click Next.