https://support.mozilla.org/en-US/kb/install-older-version-of-firefox
Used that link
many thanks
Thanks profusely! The Auto-upgrade totally trashed my windows 7 professional. I couldn’t do anything without my machine locking up, had to power off and restart. Changed over to IE 11 so I could run, but all shortcuts were invalid. Just followed your URL to go back and everything seems ok. Thanks again!