After upgrade to Fedora 43, Thunderbird(Flatpack) profile lost. How do i fix?

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Hi Guys,
My first post.

After upgrading today to Fedora 43, Thunderbird(Flatpack ver) profile is lost. How do i fix ?
Have tried starting Thunderbird ‘profile’ (-p) start, but does not work.
Have checked permissions of both folder/files, and of Flatpack permissions.

Have tried the hidden feature to manual import profile, via hamburger menu, tools, import,
and pointed to both folder in /home and in /home/sp/.var/app/net.thunderbird.Thunderbird/.thunderbird/

. Gives errors:
“Import failed unexpectedly, more information maybe available in the error console”.

The hidden console page, revealed/shown by CTRL+SHIFT+J

Shows only :
23:30:11.174 Uncaught (in promise) DOMException: Could not open `/home/sp/.thunderbird/kbjvv6rc.default/prefs.js’: file does not exist (NS_ERROR_FILE_NOT_FOUND)

23:28:12.785 1762126092785 addons.xpi WARN Checking /app/lib64/thunderbird/distribution/extensions for addons
23:30:11.174 Uncaught (in promise) DOMException: Could not open `/home/sp/.thunderbird/kbjvv6rc.default/prefs.js’: file does not exist (NS_ERROR_FILE_NOT_FOUND)
23:32:32.000 Missing resource in locale en-GB: devtools/client/toolbox.ftl
23:32:32.002 Missing resource in locale en-CA: devtools/client/toolbox.ftl

Any thoughts ?
Thanks

2

I would to thank everybody for the helpful replies, since I posted question
over 3 days ago, much appreciated (not) !

I figured out a solution for those who might find themselves in same situation,
and post a question that gets ignored, as mine.

The Flatpack version of Thunderbird and the alleged updated version today,
have same flaws, and loose data.
Worse the built in emergency feature of: Hamburger menu, Tools, import, does not work,
and not sure if it ever did work, in Flatpack version.

So I installed the Snap version, and the: Hamburger menu, Tools, import,
and it does work. [NB: Below “sp” my user name so substitute, for your own]

My previous profile data folder was found in:
/home/sp/.var/app/net.thunderbird.Thunderbird/.thunderbird/t0vh7q90.default-esr/

Some others ‘might’ find their data in eg: /home/sp/.thunderbird/0z9a6icj.default-esr/

After import complete, Thunderbird will auto restart,
your emails will be restored, and it will ask for the user names and passwords, for ‘every’ email account and Calendar etc you had previously set up in it.

To make easier, and is cross-platform, I am using Bitwarden to store this data,
for easy to save and retrievals. It is the first thing I install in every distro, and in every browser application.

I would not trust Fedora anything to remember valuable credentials, as it suffers from both amnesia and insists on security question you never installed or enabled, eg KdeWallet.

After my original mentioned Fedora ‘upgrade’, common denominators, were mostly Mozilla based apps, eg also same data loss with ZEN, Floorp, Librewolf browsers,
but not chrome based 'Brave, but did effect Yandex browser.
Using mostly Brave, I somewhat dodged other data-loss, outage ‘this’ time !

Lastly, have a back-up recovery strategy, and approximate the time it takes you to
implement this, and vs temporary or permanent loss of data.

These things can happen at the worst possible time, and there maybe ‘nobody’
in the “community” to help.

3

here is the thread on flatpak and why you might not have gotten a response on it but to give you a TLDR it is not a fedora issue just a issue with possible copywrite. Thunderbird was specificly mentioned.