Up & Coming Extensions
Color Folders Requires Restart
Color your Folder Treeview Icons!
LookOut 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).
Simple Locale Switcher Requires Restart
An easier management of the user interface language
Zindus Requires Restart
Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)
Custom Address Sidebar Requires Restart
Allow you to help address sidebar more useful.
Thunderbird Message Filter Import/Export Enhanced Requires Restart
Thunderbird Message Filter Import/Export Enhanced is a compatibility port of Wind Li's add on.
Original add on here: https://addons.mozilla.org/en-US/thunderbird/addon/thunderbird-message-filter-imp/
Google Calendar Tab Requires Restart
Adds the Google Calendar web interface as a new tab directly into Thunderbird. Creating and viewing events works just as it would in a browser like Firefox
MinimizeToTray revived Requires Restart
Minimizes windows into the system tray.
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.
Secure Addressing Requires Restart
This add-on provides features to avoid sending emails to wrong addresses. Key features are a confirmation window of recipient's addresses upon sending, name and affiliation look up at mail composition and main windows, and safe auto completion.
Blinking Alert Requires Restart
Adds blink feature to the new-mail alert.
You can also disable auto-hiding of the alert.
Contacts Sidebar Requires Restart
Displays the address books in a sidebar in Thunderbirds 3-pane-window and can be toggled with the F4 key or a toolbar button.
Visit my Contacts Sidebar site for recent versions and news.
Check and Send Requires Restart
Check the message contents and addresses before you send the message...
Flex Confirm Mail Requires Restart
Confirm mail address and attachments based on flexible rules.
Auto Address Cleaner Requires Restart
Removes comment, display name automatically from addresses before sending mail.
Address Close Button Requires Restart
Adds a Address Close Button to mail compose window.
Address Move Button Requires Restart
Allow you to add a Address Move Button to mail compose window.
Confirm-Address Requires Restart
Confirm E-mail address before sending mail