What OS? I'll guess Windows... If windows, home or pro? Are you running any security software besides MS Defender? What version of Firefox? Also see this. https://winaero.com/remove-your-browser-is-being-managed-by-your-organization-from-firefox/

Hi @jonzn4SUSE. Thank you. I used that link you pointed to and was able to make it go away. I had to use a slightly different area in the Mozilla Registry but found what I needed and deleted it and it seemed to work. Now, hopefully it will stay that way. I don't know how it happened in the first place. Thanks again!!