Thunderbird 78.7.1 released with CardDAV improvements

Martin Brinkmann
Feb 7, 2021
Email, Thunderbird

Thunderbird 78.7.1 is now available; the new stable version of the email client includes fixes, CardDAV improvements, and a change that affects extensions that use legacy APIs.

Thunderbird 78.7.1 can be downloaded from the official project website or installed via the email client's automatic updating functionality. Select Help > About Thunderbird to make use of the latter (may need to press the Alt-key to display the menubar), or run the setup file after the download completes to upgrade the existing version to the latest.

The About Thunderbird window displays the currently installed version; use it to verify it.


The new minor version includes a single new feature, the ability to use OAuth2 and Google Contacts with CardDAV address books.

Thunderbird users can install extensions such as CardBook to add new address books using CardDav and other standards.

The official release notes provide an overview of all the changes. Noteworthy for Thunderbird users with extensions installed is that the installation of extensions that use legacy APIs is no longer allowed in the new version.

Thunderbird will no longer allow installation of addons that use legacy APIs.

The number of extensions affected by the change is unclear, and it is not clear either how already installed extensions are handled by the email client after the installation of the update; will extensions with legacy APIs be uninstalled automatically?

The release notes list five fixes for issues:

  • Fix for Command-Enter not sending messages on Mac OS X devices. Thunderbird users may use Ctrl-Enter on Windows/Linux or Command-Enter on Mac to activate the send function of the email client.
  • Fix for OpenPGP failing to save attachments with binary data after decryption.
  • The Send message button remained activated sometimes even though it should not be.
  • Global search user interface fixes, not specified.
  • Theme and color fixes to "improve ease of use", also unspecified.

Now You: did you notice any issues with extensions after installation of the latest version?

Thunderbird 78.7.1 released with CardDAV improvements
Article Name
Thunderbird 78.7.1 released with CardDAV improvements
Thunderbird 78.7.1 is now available; the new stable version of the email client includes fixes, CardDAV improvements, and a change that affects extensions that use legacy APIs.
Ghacks Technology News

Previous Post: «
Next Post: «


  1. Kevin. Addle said on February 7, 2021 at 5:21 pm

    Yes please

  2. Jonns said on February 7, 2021 at 5:51 pm

    They still haven’t fixed the recurring tasks issue introduced in 78.7.0. So if the calendar and tasks working properly is essential for your workflow, this update is (still) not for you.

  3. Max said on February 7, 2021 at 7:51 pm

    I upgraded from version 68 to 78.7.0 a couple of weeks ago, after testing my 20+ ‘essential’ add-ons & finding alternatives for those that were incompatible. A previous attempt to find suitable replacements had failed a few months earlier, so the situation has improved.

    Have now upgraded to 78.8.1 with no issues.

  4. owl said on February 8, 2021 at 2:12 am

    > Now You: did you notice any issues with extensions after installation of the latest version?

    My Thunderbird has been updated to the latest “version 78.7.1” last weekend (February 5, 2021) by the update manager “PatchMyPC”.
    The Thunderbird has added “40 items” extensions, but no issues (bugs) have been confirmed and everything is working fine.
    Thunderbird is also doing well.
    I got information (Listed below) about the current status from “Help> Troubleshooting Information”.

    Application Basics
    Name Thunderbird
    Version 78.7.1
    User Agent Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0
    OS Windows_NT 10.0

    Name Version Enabled ID
    *cloud – FileLink for Nextcloud and ownCloud 3.9.1 true [email protected]
    Auto Address Cleaner T 1.1 true [email protected]_
    AutoarchiveReloaded true [email protected]
    Automatic Dictionary 2.0.4 true [email protected]
    Birthday Calendar 1.0 true [email protected]
    BorderColors D 2020.12.1 true [email protected]
    CardBook 55.2 true [email protected]
    Check and Send 2.0.18 true {1B0ADFEC-846C-401D-BA54-7842CBD485D4}
    Colored Diffs 2.1.0 true {282C3C7A-15A8-4037-A30D-BBEB17FFC76B}
    Compact Headers 2.18 true [email protected]
    Config Button 1.1 true [email protected]
    Copy Message ID 1.3.2 true [email protected]
    Darko 2.0 true [email protected]_Darko
    DeepL selected text 1.2.1 true [email protected]
    DuckDuckGo 1.0 true [email protected]
    Empty Folder 1.1 true [email protected]
    Enigmail true {847b3a00-7ab1-11d4-8f02-006008948af5}
    FileLink Provider for Box 4 true [email protected]
    Folder Pane View Switcher 4.0.1 true [email protected]
    Full Address column 1.0.0 true [email protected]
    Identity Chooser 2.2 true [email protected]
    LocalFolders 3.0.1 true [email protected]
    LookOut (fix version) 3.0.6 true [email protected]_fix_version
    Mail Merge 7.3.1 true [email protected]
    Manually sort folders 2.0.5 true [email protected]
    Minimize on Close true [email protected]
    No Message Pane Sort 2.0 true [email protected]
    Previous Colors 1.2 true [email protected]
    Quicktext 3.5 true {8845E3B3-E8FB-40E2-95E9-EC40294818C4}
    Quote Colors 2.0.5 true [email protected]
    Remove Duplicate Messages 0.5.1b2 true {a300a000-5e21-4ee0-a115-9ec8f4eaa92b}
    Restart Button 1.0 true [email protected]
    ScrollAnywhere 8.6 true [email protected]_ScrollAnywhere
    Signature Switch 2.5.0 true {2ab1b709-ba03-4361-abf9-c50b964ff75d}
    Spam Scores 1.1.6 true [email protected]
    Tag Popup 2.1.5 true {61A64500-335C-418D-8FCB-E072A9ABF3DA}
    TbSync 2.20 true [email protected]
    ThirdStats 1.4.0 true [email protected]
    Thunderbird Conversations 3.2.11 true [email protected]
    Web Translate 3.1 true [email protected]_WebTranslate
    XNote++ 3.1.3 true [email protected]

  5. owl said on February 8, 2021 at 2:37 am

    As a supplement:
    I can’t comment on the “calendar issues” commented by @Jonns because I’m not using Thunderbird’s calendar feature.

  6. Anonymous said on February 8, 2021 at 4:52 pm

    Thanks to Max and owl. I was on TB 68, but their reviews gave me the confidence to upgrade to TB 78 on Windows 10.

    After you upgrade, don’t forget to check for extension updates.
    Even if your extensions were up-to-date on 68, they probably won’t be with TB 78. They might say they are incompatible with TB 78, until you update them.

    Ubuntu 20.04 is still running 68.10

  7. Anonymous said on February 9, 2021 at 2:13 am

    “CardDAV address books now support OAuth2”

    For Google. Sanctioning their taking over the email protocol.

    “and Google Contacts”

    For Google.

    “Thunderbird will no longer allow installation of addons that use the legacy API”

    For Google. The new API being the mail equivalent of the Google webextension API from Chrome initially.
    And why is that happening in such a minor version update ?

  8. David J. said on February 13, 2021 at 5:15 pm

    As mentioned in other comments, the recurring Task functionality has gone off the rails as of a couple updates ago (I’m currently using version 78.7.1)

    I’d used Tasks to handle some recurring maintenance jobs around the house, getting reminders when each was due. Now the problem is, even after marking each recurring event as ‘completed’, the status update doesn’t stick. So I keep getting more reminders to complete tasks I’ve already ‘saved and closed’ as ‘completed’.

  9. Anonymous said on February 24, 2021 at 7:14 am

    Ubuntu 20.04 has finally updated Thunderbird to 78.7.1

  10. John Simmons said on February 25, 2021 at 12:54 am

    I just got updates to 78.7.1. Two add-ons were disabled. One was Compact Header. This is an annoyance, but not mission critical.

    But then also I lost Provider for Google Calendar. This means that I can no longer access my calendars in Thunderbird. This is a MAJOR problem.

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.