Email Client Thunderbird 78.2.0 released

Martin Brinkmann
Aug 26, 2020
Email, Thunderbird

A new version of the open source email client Thunderbird is now available. Thunderbird 78.2.0 is an update for the new main branch of the email client, Thunderbird 78.0.

Thunderbird 78.0 is only available as a direct download from the project website, in-client upgrades from Thunderbird 68.x are not offered at the time of writing because of major changes that went into the new version. One of the main difference between Thunderbird 68.x and 78.x concerns add-ons support. Thunderbird 78.x supports only MailExtensions and not classic add-ons. The likelihood that some add-ons won't function anymore in the new major version is high.

Devices with Thunderbird 78.x installed will receive the update to the new version through the automatic updates feature of the email client. Users can run manual checks for updates by selecting Help > About Thunderbird to speed up the process.

Thunderbird 78.2.0 changes

The development team planned to enable OpenPGP support by default in Thunderbird 78.2.0 but decided to postpone it. The security feature can be enabled manually but the development team suggests to only use it if OpenPGP is used for "non-critical purposes".

To enable it in Thunderbird 78.0, use the config editor and change the value of preference mail.openpgp.enable to true, then restart Thunderbird.

Thunderbird 78.2.0 is a bug fix release for the most part. It includes some changes, but most users would probably consider these minor:

  • OpenPGP key generation is disabled if no default mail account is configured.
  • Saved drafts are encrypted if OpenPGP is enabled.
  • Twitter Search was removed.
  • The calendar's event summary dialog supports themes.
  • Some MailExtensions APIs use "defineLazyPreferenceGetter" to benefit from caching.

Fixes make up the bulk of the changes in the new version of Thunderbird:

  • OpenPGP Key Manager search function fixed.
  • OpenPGP Key properties dialog was too small sometimes.
  • OpenPGP encrypted emails would not send if the address included uppercase characters.
  • OpenPGP fixed resizing of Key ID column.
  • OpenPGP fixed the importing of keys containing invalid UTF-8 strings.
  • OpenPGP automatic signing for encrypted messages enabled in additional scenarios.
  • More, unnamed, OpenPGP fixes.
  • Fixed IMAP fetch chunk size.
  • Fixed an attachment corruption issue when downloading large attachments from IMAP servers that support chunking.
  • IMAP server capabilities were not rechecked after upgrading SSL/TLS connections.
  • Message composition with fixed with fonts did not work.
  • Fixed dragging and dropping of address book contacts in some scenarios.
  • Fixed address book migration failed when the file name had a dot.
  • Fixed "always prefer display name over message header" setting was always checked when editing contacts.
  • Address book performance improvements.
  • Fixed new mail account from Account Settings did not open.
  • Ctrl-A in messages did not work until focused with a mouse click.
  • Fixed Ctrl-scroll not zooming in message reader.
  • Fixed setting/changing a signature from a file was lost when closing account settings.
  • Fixed adaptive junk mail settings could not be disabled.
  • Message filter dialog fixes.
  • Various, unnamed, UX and theme improvements.

You can check out the entire release notes here.

Email Client Thunderbird 78.2.0 released
Article Name
Email Client Thunderbird 78.2.0 released
A new version of the open source email client Thunderbird is now available. Thunderbird 78.2.0 is an update for the new main branch of the email client, Thunderbird 78.0.  
Ghacks Technology News

Tutorials & Tips

Previous Post: «
Next Post: «


  1. JMGG said on January 19, 2012 at 8:25 am

    You said that Outlook isn’t your main email client, so which is your main one?

    1. BalaC said on January 19, 2012 at 9:42 am

      I think its thunderbird

    2. Martin Brinkmann said on January 19, 2012 at 10:15 am

      It is Mozilla Thunderbird.

  2. Salaam said on September 24, 2012 at 9:52 pm

    Awesome! This actually solved my problem… what a stupid bug.

  3. Claud said on December 19, 2012 at 2:08 am

    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.

    1. Lynda said on February 12, 2013 at 3:37 pm

      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!!!!

    2. Chad said on November 20, 2018 at 4:24 pm

      Solved my issue! 6 years later and this is still problem…

    3. Ivan X said on January 21, 2021 at 4:50 pm

      Fantastic. Thank you. Size did the trick.

  4. Andrew said on October 26, 2013 at 7:06 am

    This solved my Outlook problem, too. Thank you. :)

  5. Charles said on December 7, 2013 at 7:23 pm

    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.

  6. garth said on November 7, 2014 at 7:13 pm

    You are a god – thank you!

  7. Faisal said on February 9, 2015 at 10:09 am

    thanks a lot…. work like charm.. :-)

  8. Simon said on March 24, 2015 at 11:36 pm

    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

  9. Olu said on April 14, 2015 at 1:35 pm

    Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
    Thank you

  10. Coenig said on July 23, 2015 at 7:36 am

    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 :-)

  11. Fali said on January 20, 2016 at 4:19 pm

    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.

    1. MIki said on January 10, 2019 at 11:54 am

      I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!

  12. Christina said on January 20, 2016 at 6:14 pm

    Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007

  13. Oz said on July 22, 2016 at 3:20 pm

    Great tip! Thanks!

  14. Tracy said on September 1, 2016 at 4:48 pm

    Worked for me, too – thank you!!!

  15. shawn said on September 9, 2016 at 10:25 am

    It’s Worked for me, too
    thank you very much!

  16. Jari said on October 31, 2016 at 11:53 am

    I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!

  17. Michel H said on November 30, 2016 at 11:08 pm

    Thank you so much. Solved!
    Considering you published this in 2012, incredible not been debugged by Microsoft.
    Thank you again. M

  18. Ziad Bitar said on January 9, 2017 at 2:00 am

    This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.


  19. Anonymous said on February 15, 2017 at 5:24 pm

    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.

  20. Rochelle said on March 6, 2017 at 11:59 am

    Thank you, this worked !!!!

  21. anom1234 said on May 20, 2018 at 11:20 pm

    Man, you are a fucking god. Thanks a lot, what an annoying bug!!

  22. JC said on October 12, 2020 at 2:14 pm

    Awesome, this post solved the issue. Many thanks!

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.