7 Add-ons To Get You Started With Thunderbird 3

Martin Brinkmann
Sep 29, 2009
Updated • Jan 8, 2018
Email, Thunderbird

Thunderbird 3, which is currently available as a beta version, promises to be an excellent desktop email program far superior to the current version.  The program comes with many exciting features like powerful search options, archiving, tabbed email reading or message summaries.

Most of the add-ons that are currently available at the Mozilla Thunderbird website are not compatible yet with Thunderbird 3. The following seven add-ons on the other hand can already be used with Mozilla Thunderbird 3.

Update: Thunderbird 3 is no longer the latest version of the email client. We have updated the list of add-ons that you find below to make sure that they are compatible with all recent versions of Thunderbird. End

The compatible extensions

gContactSync [link]

google contacts sync

This add-on makes it possible to synchronize contacts between the Thunderbird email client and one or multiple Gmail and Google accounts. The add-on syncs all contacts and groups.

Remove Duplicate Messages [link]

duplicate emails

Duplicate emails are usually experienced during connection errors or if the mail program or mailboxes got damaged. This add-on cleans duplicate emails easily offering to move or delete them in the email program.

Recently added extensions

  • Classic Toolbar Buttons -- The add-on restores the old Thunderbird toolbar buttons.
  • Compact Header -- This adds a switch to Thunderbird to toggle between regular and compact headers in the email program.
  • Enigmail -- Add OpenPGP support to Thunderbird.
  • Mail Merge -- Mail merge sends the same message to individual recipients so that you don't have to use the To, CC and BCC fields.
  • Send Later -- Extension to schedule the sending of emails.

The old extensions

The situation will likely change with the final release of the email client. It is on the other hand likely that most Thunderbird add-ons will function correctly if their compatibility is edited manually or by using an add-on like the Nightly Tester Tools.

Buttons [link]

The Buttons add-on adds several new buttons to Thunderbird 3 including buttons to display the next or previous email (as opposed to displaying the next or previous unread email which is the default option in Thunderbird), SMTP server selection, delete junk button that marks the message as junk and deletes it afterwards, HTML and Image on and off buttons or a delete thread button that deletes the entire thread of messages.

Hide Menubar [link]

email menubar

The Thunderbird 3 menu does not usually need to be displayed all of the time. Especially users with lower screen resolutions might be interested to save screen estate to work more comfortable in the email client. Hide Menubar is a straightforward Thunderbird 3 add-on that hides the Thunderbird 3 menubar automatically. The alt key can be used to switch between hiding and displaying the menubar.


Smooth Wheel [link]

thunderbird mouse

Smooth Wheel offers the ability to fine tune the mouse scrolling smoothness in Thunderbird. The default smoothness does not satisfy many Thunderbird users (and actually Firefox users as well) and this is the add-on to customize the smoothness for a better experience.


FiltaQuilla [link]

email filters

FiltaQuilla adds new filters to Thunderbird extending the automatic email processing options in the email client. It is for example possible to launch or run a file, append to subject, train the email program as good or junk and mark the email as unread or replied.

Foxclocks [link]

email clocks

Can display multiple clocks in the Thunderbird interface.

Know of any other Thunderbird 3 add-ons that should be in this list? Let us know in the comments.

7 Add-ons To Get You Started With Thunderbird 3
Article Name
7 Add-ons To Get You Started With Thunderbird 3
The article reviews several extensions for the Thunderbird email client that are all compatible with the most recent versions of the application.
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  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!

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