Thunderbird – synchronize Google Contacts and Calendar with TbSync (English)

Synchronize Calendar and Contacts with your Google account!

Video instructions


Ever since I used “Gcontactsync” to synchronize my contacts and calendar with Thunderbird. Unfortunately the plugin does not longer work for newer versions of Thundbird. The better alternative is TbSync.

You can install the plugin directly in Thunderbird.

Officially Google Accounts are no longer supported by the plugin. However the functionality can be activated in the extended settings. Open the Thunderbird settings and scroll to the bottom and click on the “Config Editor” button.

Accept the warning which appears. In the editor we have to create a new “boolean value”. Right click somewhere and select “New” – “Boolean”.

Enter “extensions.dav4tbsync.googlesupport” as value and click OK.

The boolean value must be set to “True”.

The value is displayed in the config editor.

Restart Thunderbird to apply the new setting. After restart, we have to open the TbSync settings.

Add a new “CalDAV & CardDAV” account.

The plugin will now tell us, that we need another plugin for CalDAV and CardDAV support. Click the link in the settings and install the plugin.

Once this is done, we again try to add the account. Notify that the icon has changed:

The server profile dialog shows up and now select “Google”. If its not shown check the extended settings me made before for typos.

Enter an account name on the next page. On the next page we are asked for the credentials of our Google account.

After login you need to allow the access to your Google account.

That’s it! The account is created, just click finish on the last page.


Now all we have to do is synchronize our account. Activate the synchronization and select the contact lists and calendars you want to synchronize. You can also define read/write access.

Once you click the “Synchronize now” button the items are synchronized. You can also set a periodic sync by changing the number from zero to any other value.

If you look at the calender and contacts in Thunderbird your items should appear.

3 Kommentare

  1. I just switched to Thunderbird email as it seems to provide the services and view I like. Finding that calendar does not synchronize with the Google browser led me to your TBSYNC solution. Unfortunately, when I get to ” The value is displayed in the config editor. ” and restart Tbird reports a TBSYNC ERROR at the lower right. From there I can’t get further since ” Add a new “CalDAV & CardDAV” account ” appears inoperative and I can NOT get to the account screen. My Tbird version is 78.10.1 (64-bit) operating on Windows 10, I am in NC USA.
    Can you suggest any solution to my issue?

    Thank you for any suggestion you can provide.

    1. Hi Wilfried,
      have you created a profile for Google already or does this error appear before? As I understand you correctly, the error appears directly after changing the settings and you have not added support for CalDav & CardDav yet?
      In that case, I can only recommend to uninstall and reinstall the plugin. Hopefully the problem will disappear.

      Do you speak german?

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