When you try to open Firefox by clicking its icon on the desktop or taskbar, you may get an error :’Could not Find the Mozilla runtime’, let us see how to fix this.

Fixing Firefox’s Error ‘Could not Find the Mozilla runtime’

1. Using another browser like Internet Explorer or Chrome, download Firefox full installer from here and save to a location on your desktop.

READ: Offline Installer Links for Firefox Nightly, Aurora, Beta and Release Channels [Updated]

2. Now navigate to ‘C:\Program Files’ for 32-bit  or ‘C:\Programs Files (x86)’ and delete the Mozilla Firefox folder without any hesitation.

Rest assured! Your Firefox profile folder which contains, bookmarks, extensions, plugins and other browser data is kept in a separate location and won’t be affected.

3. Now install Firefox, it will be installed and opens later without any issues. 

SEE: Fix Firefox’s Error ‘The bookmarks and history system will not be functional because ..’