If your Mozilla Firefox browser is not working, the issue is likely caused by a problem with the program files. The solution, according to Mozilla Support, is to remove the existing Firefox installation and then reinstall the browser.
Removing the Firefox Installation
To fix a non-working Firefox, you’ll need to delete the existing Firefox installation directory, which is typically found in one of these default locations:
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– C:\Program Files\Mozilla Firefox
– C:\Program Files (x86)\Mozilla Firefox
Once you’ve located and deleted the Firefox installation directory, you can proceed to reinstall the browser.
Reinstalling Firefox
After removing the existing Firefox installation, you’ll need to download and install a fresh copy of the browser. You can do this by using another web browser to visit the Firefox download page and downloading the latest official version of the software.
Follow the on-screen instructions to complete the installation process. This will not remove your personal data, such as passwords, bookmarks, and settings, as those are stored in a separate profiles folder.