Дополнения

FlashGot Mass Downloader от Giorgio Maone

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

Auto Resize Image от TrVTrV

Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).

User Agent Switcher от chrispederick

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Quicktext от John Bieling

Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.

Diccionario español México от eduardo_moreno

Diccionario para México.

Duplicate Contact Manager от Marian Steinbach, Copelnug

Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.

ThunderBrowse от GS! Networks

Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!

Custom Address Sidebar от shimamu

Allow you to help address sidebar more useful.

Slideshow от Leszek Życzkowski, pastisman

Просмотр вложенных в письмо изображений
When email has attached pictures, it displays "View as Slideshow" button next to the attachment. Button click pops a slideshow window with all the images, allowing you to zoom in/out, save...

Sender Name от Takahiro Shinagawa

Restart application от Julien Fray

Restart the application with one click (or Ctrl Shift Z)

Select Address Book Text от craigm

Copy and paste a name, phone number, address or other text from your Thunderbird address book quickly, with just a single menu click.

Fit Images от V@no

Fit large images to window when viewing a message.
Control how you want to fit images: by width, height or both.