Add-ons
Message and News Reading
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Reply All Control
Requires Restart
Allows you to disable the ability to use Reply All when your email address does not appear in the To: or CC: fields. This usually means you've been BCC'd and Reply All might reveal the sender's sinister plot.
HERA - Hotel Email Reservation Assistant
HERA helps hotels to semi or fully automatically respond to emails by checking rates in your PMS / CRS
Forumzilla
Requires Restart
Forumzilla lets you read news and blog feeds in your email application. It is similar to the feed reader built into Thunderbird, but it lets you download stories into any folder in any POP, IMAP, or local account (configurable per...
ThunderBird Ticker
Get Selected Messages
Requires Restart
Adds the button on the toolbars "Get All New Messages", "Get Selected Messages" and "Get Starred Messages", the analog of button from File and File->Offline->Get Selected Messages, Get Starred Messages for loading selected messages by...
SJCall
Requires Restart
SJCall is a beta version of a VoIP extension enabling you to place telephone calls directly from the Mozilla applications using SJphone, the world-leading Internet softphone...
Sent-By-User column
Requires Restart
Adds a new column in message list-view, that will display the name of the user who sent the mail (read from a message header).
Manual configuration required. ONLY FOR THUNDERBIRD.
RSS Linkify Subject
Requires Restart
Linkify Subject header with Content-Base URL when viewing RSS item to easily open it in...
PasteIP
Requires Restart
Easy pasting of your IP address or User-Agent in a textbox. Comes in handy when posting on forums, etc.
PECindolor
Newsgroup Links
Requires Restart
Displays a link to the Google groups url of a newsgroup post, and an option to copy it.
Cairo-Dock unread messages
Requires Restart
Displays the number of unread messages in all inboxes on your dock.
Bugzilla Helper
Requires Restart
Quickly reply to your bugmail on bugzilla.mozilla.org without leaving Thunderbird.
Headers Toggle
Requires Restart
Gives Thunderbird a keyboard shortcut (H) to change how headers are displayed.
Requires Restart
FTN-style message quoter (like GoldEd) & so on
TamilVisai (TamilKey)
Requires Restart
A utility for typing in Tamil language. It will be ideal for Tamil bloggers...
Chat RTL
Requires Restart
Fixing the Chat so it would support RTL languages (i.e. Hebrew, Arabic) better.
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