Exporting / Moving Thunderbird Address Books

1. At the top of Thunderbird, click Tools > > Address Book
   (If you do not see the top menu bar for ‘tools’, Press Alt or F10 to see the menu)
2. Select the specific address book (by default, All Address Books are selected and this will result in a blank file)
3. Once selected, click on Tools >> Export
4. Save the CSV file to your Desktop
   
   (If moving this to a new computer, continue to step 5.)
   
5. Move this file to the other computer (email the file to yourself or move with a flash drive)
6. In the other computer open the Address Book in Thunderbird
7. Click on Tools >> Import , select the file that you exported earlier