Дополнения

Manually sort folders от Jonathan Protzenko, Itagaki Fumihiko

Расширение, которое позволит вам изменить порядок сортировки папок в панели папок Thunderbird.

gContactSync от Josh Geenen

gContactSync - add-on, позволяющий синхронизировать ваши Google-контакты с Адресной Книгой Thunderbird 2 или 3.

Rise of the Tools от rsjtdrjgfuzkfg

Moves the toolbar back above the tabbar.

Extra Folder Columns от 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 от 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 от Takahiro Shinagawa

SendWithoutSubject от pastisman

Send without subject and without confirmation alert