Note from Mozilla: This add-on has been discontinued. Try MinimizeToTray Revived instead.
Minimize applications to the system tray.
Nautipolis for Thunderbird: High-quality, solid theme based on icons from art.gnome.org.
Fully compatible with from 5.0 upto latest nightly build (currently 27.0a1). Full support for Lightning/calendar.
German dictionary igerman98 (de_AT, Austria), for Firefox, Thunderbird und Seamonkey.
Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.
A full-featured scientific calculator which can be placed in any Firefox tool-bar or the Australis PanelUI.
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.
Launchy will enable you to open links and mailto's with external applications...
German dictionary igerman98 (de_CH, Switzerland), for Firefox, Thunderbird und Seamonkey.
Gives an option to show the master password on input
91 weekly downloads
Search in Wikipedia.org
Results are in German and in English.
Adds toolbar buttons to Mark All emails as Read, Mark Thread as Read, and Goto Next Unread Thread.