There is a file in the profile folder named compatibility.ini which identifies the Firefox version used by your profile so that, if you are running different versions, you will need a different profile for each. You can create a profile without running Firefox and transfer data to it from an old profile.

https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

Hi Terry,

I dont need help with managing profiles or importing data. My issue is that i get prompted to create a new profile even though i dont want to create a new profile.

I'm not running different version of Firefox. I'm running only single version as far as i can tell. I uninstall and re-install firefox and I still get a prompt telling me to create a new profile. I downloaded and running the latest version of Firefox.

How do I stop firefox prompting me to create a new profile?

Sorry, I thought you were using an older version. Another user has the same issue. I don't know whether it is your system or Firefox. You can check Firefox using the troubleshoot procedures outlined in various articles. A Windows user can possibly assist with system problems.

https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems