I have Firefox version 100.0 (64-bit) and version 122.0.1 (64-bit) installed somehow. Both versions when you click on Help>About Firefox say they are up to date. I can uninstall the 122.0.1 version. I cannot uninstall the 100.0 version. 100.0 says it is up to date but in the top right corner there is a box that says: Update available Firefox couldn't update automatically. Download the new version - you won't lose saved information or customizations. If I tell it to download I get the 122.0.1 version installed separately from the 100.0 version. How do I get only ONE installation of Firefox?