Thunderbird 78.3.3 is out. Find out what is new

The Thunderbird email client development team has released a new version of the latest version of the desktop client for all supported operating systems. Thunderbird 78.3.3 is a minor bug fix release that addresses issues in the client's OpenPGP implementation and in the built-in calendar.
Thunderbird installations should pick up the new version of the email client automatically as it is available already. Administrators who don't want to wait for that to happen can select Help > About Thunderbird to run a manual check for updates. The client's built in updating module will pick up the new version and install it automatically.
The new Thunderbird 78.3.3 can also be downloaded from the official project website. It can be used to install Thunderbird for the first time but also to upgrade existing installations of the program on the target system.
Three of the four fixes in Thunderbird 78.3.3 address issues in the OpenPGP implementation. Thunderbird introduced native support for OpenPGP in version 78. The functionality was disabled at first but enabled soon thereafter. It enables users to encrypt and decrypt email messages provided that recipient and sender use encryption to protect emails from being read without permission.
The following three issues have been fixed in the new version:
- OpenPGP: Improved support for encrypting with subkeys
- OpenPGP message status icons were not visible in message header pane
- OpenPGP Key Manager was missing from Tools menu on macOS
These appear to be minor changes for the most part.
The fourth and final change in Thunderbird 78.3.3 fixes a calendar issue. Previous versions of the email client did not require an event title when adding new calendar events using the built-in calendar; this changes with the new release as event titles are now a mandatory field when adding new events to the calendar.
The long-standing issue that the message list is not focused when the email client starts up remains. It is a minor issue.
You can check out the entire release notes here.
Now You: Do you use Thunderbird 78.x? What is your take on the email client?


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!