I let FireFox update to 68.0.2, I think the previous version was 66.0.2. Based on upgrade-jasonlz4, it was installed 2019 0529. A screen displayed some information that I did not save and cannot find again. It indicated that my previous profile information was inaccessible but not gone, it could be used by running a older version of FF and that now the profile info was stored on some Mozilla server and that I needed to create a account. This has been very disruptive. The only account I created was to be able to write this and the new FF seems to have created it’s profile in Firefox\Profiles. I have looked at the release notes for versions 66.0 thru 68.0.2 and don’t see anything about a new profile format or compatibility issues. I have Windows Explorer equivalent access to my restore points and see firefox.exe dated 6/10/2019 which differs from the upgrade file date but I could restore the system to that point. So is it true that there is a profile compatibility issue and I need to use the old firefox to use the old profile? If so, why is it not mentioned in the release notes and if not why did the new FF create a new profile? I found a index of previous versions to DL (https://ftp.mozilla.org/pub/firefox/releases/) If I get a suitable version and use custom installation, will I be able to make it use my old profile?