Thunderbird and Firefox "profiles" disappear when using updated versions of software

I had to reinstall my computer, and tried to "import" my previous Thunderbird and Firefox settings by copying my old .mozilla and .thunderbird folders into my new instillation.

If I use old versions of Firefox and Thuderbird, everything works okay (Thunderbird 60.9.01 and Firefox 66.0.5). However, if I install new releases of Firefox and Thunderbird, they prompt me to "create a new profile," and when I create the profile, all previous settings are ignored (mail-folders in Thunderbird, browser history and passwords in Firefox, etc.).

Any clues about what is going on, and how to solve this problem?

6

1 Answer

Firefox 67 and later use a changed name scheme for profile folders to allow different profiles for different "channels" of firefox to live together. Profiles associated with the stable release have "-release" appended to their profile name. The same applies for more recent Thunderbird versions.

So for this single time, copy the contents of your old profile over to the newly created profile with the "*.default-release" name to restore your settings.

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