Thunderbird is great! But without your address book it won’t be usable. Here are the steps to import your contacts from GMail.
- Login to GMail, click on Gmail and choose contacts (left-upper side of gmail).
- Click More > Export…
- Choose vCard format.
vCard is important because coma separated CSV format is not reliable and you may end up with corrupted contacts.
- run Thunderbird, Click on Address Book
- Tools > Import
- Choose Address Books
- vCard file
- Choose GMail’s vcard export file.
That’s it! All contacts are there, without any conflicts.