Hi mattinmn71, unfortunately, Firefox doesn't keep backups of the critical files * logins.json * key4.db But you might be able to recover earlier versions from Windows 10 in one of the following ways: ''First, set Windows to show hidden files and folders:'' https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files '''''Deleted File Recovery''''' A tool like Recuva can recover some erased files. This could be useful to track down recently removed files. * https://www.ccleaner.com/recuva The usual path for a Firefox profile is: C:\Users\''your-user-name''\AppData\'''Roaming'''\Mozilla\Firefox\Profiles\ Individual profile folder names have a random portion, like d39tx201.default-release Can you find any recently deleted logins.json and key4.db files? Probably key4.db wasn't changed by the deletions, so if you can only find recent logins.json files, that would still be good news. '''''Shadow Copies''''' You can use a utility program to search inside restore points to try to locate an old file that's usable. (Please do NOT try to use the built-in Windows System Restore for this because you probably would lose data.) Download and run one of these two programs: * ShadowExplorer: http://www.shadowexplorer.com/ * System Restore Explorer: http://nicbedford.co.uk/software/systemrestoreexplorer/ Within the most recent restore point shown in the program, you can explore along this path to see whether you can find a shadow copy of your profile: \Users\''your-user-name''\AppData\'''Roaming'''\Mozilla\Firefox\Profiles\ You can export logins.json/key4.db files to a convenient location such as your currently live desktop. Any luck? ---- Once you have files to try, you can drag-and-drop logins.json on a Firefox tab to view its contents. Normally the site are readable and passwords are gibberish. Usernames may or may not be readable. Anything promising?

Thanks for your quick response. I was hoping this was not the case.