How do I export my contacts from Thunderbird?

Mozilla Thunderbird, a free email and news client, was developed by the Mozilla Foundation. To export your email list from this client, follow the steps below: In Thunderbird, click Adddress Book. Choose the Address Book you wish to export. Go to Tools and click Export. In the Format drop-down box, choose Comma Separated (.csv). Select a location to save the exported list and hit Save.