Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.
Unclutter the "Tools" menu by moving new items to a "More Tools" menu.
Displays icon for user agent of received mails.
Display birthdays from the Thunderbird addressbooks as events in Lightning.
Note from Mozilla: This add-on has been discontinued. Try MinimizeToTray Revived instead.
Minimize applications to the system tray.
Minimizes Mozilla windows into the system tray. Also includes a right clickable tray icon menu to further load only the windows you want visible...
Allow you to add a Return Receipt button to mail compose window toolbar.
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.
Birthday Reminder reminds of upcoming birthdays for all contacts in Thunderbird's address book. Supports Lightning, reminders and even Google Calendar :-)
MagicSLR extends functions and buttons to get and send messages. Many users missed a combined "Get/Send" button in Thunderbird. MagicSLR provides this button and more.
The text complete extension adds shortcuts and auto complete functionality to text fields within web forms, the thunderbird message composer, and various other fields within the firefox browser and thunderbird messagecomposer.
The available ...
All-in-one Mac style theme! Please check preview here first (it rocks):
To get sub themes: Open Add-ons window, right click on Cutebird, click "About Cutebird"
more info at http://foxdie.us