Thunderbird 78.0.1 has been released

The team that is responsible for developing the Thunderbird email client has released Thunderbird 78.0.1 to the public on July 21, 2020.
The new version is the first minor update for Thunderbird's new main version 78 that was released last week to the public. The new version of Thunderbird is offered as a direct download and installation only at this point in time because of its wide-reaching changes.
One of the big changes of Thunderbird 78 is that classic add-ons don't function anymore in the application.
Thunderbird 78.0.1 is already offered as an in-client update but users may download the latest version from Mozilla's website as well. The update is only offered to devices running Thunderbird 78 and not to devices running earlier versions of the email client.
Warnings that Thunderbird users who use the encryption extension Enigmail should not update at this point in time still apply.
Thunderbird users can run a manual check for updates in the client by selecting Help > About Thunderbird from the menu. Thunderbird runs an update check and offers to download and install the update if one is available.
Thunderbird 78.0.1 is a bug fix release for the most part. It fixes ten different issues in Thunderbird 78; these are:
- Faceted search data and relevance settings not saved.
- FileLink attachments were included as a link and a file when added via drag & drop from a network drive.
- The dragging and dropping of multiple attachments to Mac OS Finder created duplicate files.
- Recipients in the CC field collapsed sometimes in the header pane.
- Search results displayed in the Contacts sidebar were cleared when a contact was removed.
- Incremental search in the Contacts sidebar did not always display local results when an LDAP server was in use.
- About Thunderbird keyboard shortcuts did not work.
- Faceted search date and relevance settings were not saved.
- Messages with long Armor header lines did not display using OpenPGP
- Messages containing non-UTF-8 text were not supported in OpenPGP
- The list of participants in chats did not display operator flags.
- Various UI and theming fixes.
Thunderbird 78.0.1 includes new functionality as well. The OpenPGP implementation supports the following new features:
- Key revocation.
- Key expiration extensions.
- Secret key backups.
You can check out the entire release notes of the new Thunderbird version here.
Now You: Do you use Thunderbird? Have you upgraded to Thunderbird 78 already?


You said that Outlook isn’t your main email client, so which is your main one?
I think its thunderbird
It is Mozilla Thunderbird.
Awesome! This actually solved my problem… what a stupid bug.
If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.
THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!
Solved my issue! 6 years later and this is still problem…
Fantastic. Thank you. Size did the trick.
This solved my Outlook problem, too. Thank you. :)
Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.
You are a god – thank you!
thanks a lot…. work like charm.. :-)
Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers
Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
Thank you
Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)
Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.
I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!
Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007
Great tip! Thanks!
Worked for me, too – thank you!!!
It’s Worked for me, too
thank you very much!
I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!
Thank you so much. Solved!
Considering you published this in 2012, incredible not been debugged by Microsoft.
Thank you again. M
This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.
Thanks.
Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.
Thank you, this worked !!!!
Man, you are a fucking god. Thanks a lot, what an annoying bug!!
Awesome, this post solved the issue. Many thanks!