Autoshutdown for FireFox Download Manager
The most cute thing of Mozilla FireFox is the Download Manager which can queue up all the download requests and then slowly download one-by-one with the ability of Pause and Resume. One feature I loved in GetRight was there was an ability to turn off the computer after all downloads are complete. But FireFox does not have this ability. After all downloads complete, a balloon tool tip near the system tray would popup to indicate that all downloads are complete.
While casually browsing through Mozilla FireFox website, I came across a plugin called 'Autoshutdown' which gets integrated to FireFox download manager. Now the download manager gets one more checkbox called 'Shutdown after all downloads are finished'.
This would add more feather to the cap of the cute little FireFox right. You can get this plugin from FireFox Addons page here.