Mozilla New Mail Icon is an extension which displays an icon in the system tray when new mail arrives in your Mozilla Mail or Mozilla Thunderbird . It supports the standard (FreeDesktop.org) system tray, as used by GNOME, KDE, and IceWM.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
