Conversation Meta Language Requires Restart

Email Conversation using XML...

Unselect Message Requires Restart

Prevents Thunderbird from selecting the next message after you've deleted or moved the previously selected ones. Stay in control of which message you want to have selected and displayed in the preview pane; that piece of spam you're deleting...

Reply In Group Requires Restart

Adds "Reply In Group" and "Reply to sender" toolbar buttons to the main window. So it's easier to reply in Usenet...

PONG! Multiplayer Requires Restart

Play a game of PONG! while you are waiting.

Update Notifier Requires Restart

Note from Mozilla: This add-on has been discontinued. Try Add-on Update Checker instead.

Notifies you when updates are available for your extensions and themes.

Thunderled Requires Restart

For ASUS laptop owners, each time a new email is in your inbox, the email led will switch on...

LDAP Swapping Requires Restart

This extension allow you to simply switch on / off the LDAP autocompletion.

DOM Inspector - Mac OS X Requires Restart

Inspect the DOM of HTML, XUL, and XML pages, including the mail...

Cat Attack Quick Button Requires Restart

Easily visit the site for The Cat Attack Fishing Tournament.

Russ Key Requires Restart

Allows typing in phonetic Russian and transforming Russian translit into Cyrillic...

Edit As New Requires Restart

Adds "Edit As New" toolbar button to the main...

Close Window on IMAP deletion Requires Restart

Closes the mail window on delete, although 'mark as deleted' is activated for IMAP

lernu-es Requires Restart

Language learning : at every page load there appears a random Esperanto-Spanish word translated in the status bar. ...

ZenbuShiitake Requires Restart

StickyCharset Requires Restart

Allows persistent charset changes on individual messages. For use with messages that have erroneous charset header...

FolderCheck Requires Restart

Allows you to easily tell Thunderbird to check multiple folders for messages

Splash! Requires Restart

Adds a splash screen to most Mozilla and Mozilla Based products. Supports sound, opacity, CSS customization, custom images, and much more. You can add {appVersion}, {buildID} and {userAgent} to the loading text and it will be filled in for you.

compactfolder Requires Restart

A toolbar button for compacting/purging the currently-viewed...

MarkSubfolders Requires Restart

This Add-on provide ability to mark as read subfolders.

IO.Translator Requires Restart

即时在线汉英互译 - Instant Online Translator (Chinese-English)