Mozilla Firefox was automatically upgraded as I opened my computer. The new version started and the startup page was shown as if I had never used the Firefox browser on this computer before. I've been running Firefox on this computer for at least 6 years. All my saved data was gone. No bookmarks, no saved access accounts. When it asked me to migrate my data I didn't have the option to migrate any of my saved data from my previous version of Firefox. How do I get all my saved data back? I also received a message that one of my my gmail email account had been accessed by an unauthorized party. Is this also part of the installation process?
Please let me know what to do to get my saved data back.
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Enter about:profiles in the URL bar and check if you have there any other profile.
This article may help.