Thunderbird 78 FAQ (Mozilla Thunderbird email client version 78 issues and resolution)

Mozilla Foundation ^ | July 2020 | Mozilla Support

[dayglored]

> They should at least have an option to revert back to the old version if someone is having serious problems.

I agree, there should be an easy way to roll back. Failing that, regular backups help -- Apple's TimeMachine is ideal for rollback.

But if you don't have a recent backup, Mozilla has all the old versions available for download and install:

https://ftp.mozilla.org/pub/thunderbird/releases/

[daniel1212]

In contrast to much of today. My first car was a 63 T-bird. But thank God for what we have, and engines that last far longer.

[daniel1212]

I used T-bird 78.4, with no extensions (yet) and I surmise an extension is the problem in your case. Mine (with personal content redacted) looks like

[dayglored]

BTW, if you want to get a more recent version than the one Ubuntu is posting, go here: https://ftp.mozilla.org/pub/thunderbird/releases

For example, for Ubuntu 64-bit: https://ftp.mozilla.org/pub/thunderbird/releases/78.4.0/linux-x86_64/en-US/

Of course, it's just the application as a compressed tarball. The extra stuff to hook it into the OS and your favorite desktop environment is manual since that's individualized.

[minnesota_bound]

For future updates or reinstall, copy your email off to a safe location.
Unfortunately Thunderbird does not make it easy such as Backup> Account but has you do searches on the internet on how to backup and import the email.

You gotta be a geek to do it !

Profiles - Where Thunderbird stores your messages and other user data
https://support.mozilla.org/en-US/kb/profiles-where-thunderbird-stores-user-data

Moving Thunderbird Data to a New Computer
https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer

The random yccklof6.default name is different for your install.

Open Thunderbird> Tools> Account Settings> Local Folders>
Local directory>
C:\Users\ Your name \AppData\Roaming\Thunderbird\Profiles\yccklof6.default\Mail

Your old email is there. You can copy and paste the folders into your new folder from the new install.

Inbox.sbd
Sent.sbd
Drafts.sbd
Templates.sbd

[upchuck]

Been running Tbird for years without any problems.

Currently running 60.2.1 on Windows 7. Flawlessly.

Charlie Brown

PS: My philosophy regarding updates: why fix something if it ain’t broke? Which is why I’m running Win 7 instead of Win 10.

[Mr. Blond]

You can pry Eudora 7 from my cold, dead hands.

[ImJustAnotherOkie]

Ahhh..Windows7.

[dayglored]

> You can pry Eudora 7 from my cold, dead hands.

I used Eudora (6 as I recall) for years, long ago. Nice client.