To export your address book from Gmail and import it into Mozilla Thunderbird:
- Save your Gmail contacts as gmail-to-outlook.csv.
- Select Tools | Import… from the menu in Mozilla Thunderbird.
- Make sure Address Books is selected.
- Click Next >.
- Highlight Text file (LDIF,.tab,.csv,.txt) under Please select the program from which you would like to import.
- Click Next >.
- Select the gmail-to-outlook.csv file you just created.
- Make sure First record contains field names is checked.
- Use the Move Up and Move Down buttons to match Mozilla Thunderbird address book fields on the left with Gmail fields on the right.
- Make sure at least
- Primary Email and E-mail Address and
- Last Name and Name match.
- Gmail has a unified name field and does not distinguish between first and last names.
- You can use the Next button at the top to see what the import process will produce.
- Click OK.
- Now click Finish.
In your Mozilla Thunderbird address book, you will now find a folder named “gmail-to-outlook” with all imported contacts.