Google Contacts for Thunderbird 0.5.54

Access bi-directionaly to Google contacts via address books. This extension detects gmail accounts which have already set up and creates address books for each of them.
Cards in the address books are synchronized with Google contacts; they represent the current Google contacts contents and Google contacts will be modified when you modify the cards. TBs mailing lists and Googles contacts groups are synchronized in the same manner.
The Google Contacts extension allows you to access your Google contacts and synchronize them with Thunderbird address books.
Note: The Google Contacts addon is cross-platform and it works on Mac OS X, Windows and Linux.

System requirements:
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Version restrictions:
- A primary email must be unique in an address book. It is a limitation of Google.
- At least one of a primary email and a display name must have a value. It is a limitation of Google.
- A mail list, which is a contacts group in Google, must be unique in all address books. If some Google accounts have a group which has the same name, only one group is imported and others are ignored. It is a limitation of Thunderbird.
- Only items exist in both Google and Thunderbird are synchronized.

Enhancements
- Fixed: Modification of a mail list is not synchronized.
- Fixed: Batch mode does not record offline activities.