SQLite Manager Requires Restart

Manage any SQLite database on your computer.

Firesizer Requires Restart

Allows you to resize the window to specific dimensions.

NOTE: Users of Firefox 29 and above must install "The Addon Bar" extension to use this, as Firesizer uses the add-on bar that has been removed in Firefox 29.

Auto Resize JPEG Requires Restart

Resizer for inline and attachment images (only JPEG format).
For Windows only.

xSearchbarT2 Requires Restart

Somewhere between Thunderbird 1.5 and Thunderbird 2 the message search bar disappeared. This extension restores the search bar. Thunderbird 2 and newer only.

Boomerang Requires Restart

Boomerang E-Mail ist ein Plugin für den Thunderbird E-Mail-Client und basiert auf dem Boomerang e-Mail Algorithmus (patent pending).

Es stellt Funktionalitäten bereit, um eine beliebige e-Mail (inklusive Anhänge) der Reihe nach zu mehreren Empfänger...

Folder Filters Button Requires Restart

Just a very simple add-on that adds a toolbar button to execute the "Run Filters on Folders" from Tools menu.

Multi-LDAP Requires Restart

Permits to use several LDAP directories simultaneously for address autocompletion.

Blinking Alert Requires Restart

Adds blink feature to the new-mail alert.
You can also disable auto-hiding of the alert.

Locale2MUI Requires Restart

Sets Firefox/Thunderbird Locale to Windows (MUI) Language on startup

Confirm-Address

メールを送信する前にあて先確認ダイアログを表示するThunderbirdアドオンです。

Kyrgyz Key Requires Restart

Allows to type Kyrgyz alphabets like Ө,Ң and Ү in any text fields of Firefox Browser, Web Pages and Thunderbird. Converts Latin words into Cyrillic words instantly. Makes EnglishRussian translations.

Send Filter Requires Restart

This add-on allows you run your message filters automatically on outgoing messages after sending. In other words, it's a outgoing filter for thunderbird and seamonkey.

WordReference Translator Requires Restart

Open a tab with WordReference's translation for the selected word. Through a floating link, or by pressing "D" key.

Simple Search-For Extension Requires Restart

Adds a "Search for" item to Thunderbird's context menu, like in Firefox.

bosskey Requires Restart

Add Boss Key, Minimize/Close to tray and memory auto cleaning to Firefox.

ThunderBrowse Requires Restart

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!

ThunderBirthDay Requires Restart

Display birthdays from the Thunderbird addressbooks as events in Lightning.

ThreadBubble Requires Restart

Make Thunderbird resort threads by date when a new message arrives. *** This add-on is no longer required for new versions of Thunderbird! ***

Copy Link Name for Thunderbird Requires Restart

It's like Copy Link Name for Firefox but for Thunderbird!

Sender Name Requires Restart