Pengaya

Manually sort folders oleh Jonathan Protzenko, Itagaki Fumihiko

This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.

gContactSync oleh Josh Geenen

Synchronizes contacts & groups between Thunderbird and Google Contacts.

Rise of the Tools oleh rsjtdrjgfuzkfg

Moves the toolbar back above the tabbar.

Extra Folder Columns oleh Joey Minta, Thunderbird Development Team

This extension is for those TB3 users who want the multiple-columns view that TB2 allowed

IMPORTANT: If you are using Thunderbird 38 or later, uninstall this addon. The functionality is in core now.

Display Contact Photo oleh Samuel Mueller

Displays the contact photo/image/picture of the sender/recipient while reading or composing a message. Supports photos in a local folder and the 'Face' header for embedded photos. The add-on adds new generic photos and many styling possibilities.

Sender Name oleh Takahiro Shinagawa

SendWithoutSubject oleh pastisman

Send without subject and without confirmation alert