Up & Coming Extensions
Simple Locale Switcher Requires Restart
An easier management of the user interface language
South African English spell checker Requires Restart
The South African English spell checker allows you to use place names, borrowed words, and other expressions that are unique to South Africa.
"No more eina, just a lekker spell checker!"
Ruler Bar Requires Restart
This appends a ruler to the mail composition window.
Flex Confirm Mail Requires Restart
Confirm mail address and attachments based on flexible rules.
Join-NG Requires Restart
Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".
Address Close Button Requires Restart
Adds a Address Close Button to mail compose window.
Telify Requires Restart
Converts telephone numbers into clickable links for use with CTI applications, SIP clients, Skype, Netmeeting, snom phones, the AGFEO TK-Suite Client and SerVonic IXI-PCS.
LookOut (fix version) Requires Restart
LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Support: Thunderbird and SeaMonkey
TbSync (Provider for Exchange ActiveSync) Requires Restart
Synchronize Exchange ActiveSync accounts to Thunderbird Addressbook and Calendar, supports Office 365, Outlook.com, Freenet, Strato, Hotmail, Kopano and other EAS compatible servers.
IMAP Quota (Free Space) Requires Restart
This Thunderbird addon let you customize the behaiour of the IMAP quota statusbar panel.
Lightning Invitation Notifier Requires Restart
This extension is an extension to Mozilla Lightning for Thunderbird.
It shows a toast message and opens the invitations window when an invitation arrives.
Quote Colors Requires Restart
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
Blinking Alert Requires Restart
Adds blink feature to the new-mail alert.
You can also disable auto-hiding of the alert.
Auto Address Cleaner Requires Restart
Removes comment, display name automatically from addresses before sending mail.
Addressbooks Synchronizer Requires Restart
Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers
ConfirmFolderMove Requires Restart
Introduces a preference that allows users to be prompted before moving folders.
Free/Busy Requires Restart
Publish free/busy calendar file (*.ifb) via ftp or to a file. View other people's free/busy info in meeting organizer window. Integrate Thunderbird and Outlook calendars without Exchange server.
Winmail Opener Bridge Requires Restart
Opens attached winmail.dat by Winmail Opener automatically.
Finnish spellchecker Requires Restart
Finnish open source Voikko-spellchecker for Mozilla and needed libraries.
PrintingTools Requires Restart
Adds some options to print messages and addressbooks