Quitting Mozilla:
var Cc = Components.classes; var Ci = Components.interfaces; shell = Cc["@mozilla.org/appshell/appShellService;1"]; shell = shell.getService(Ci.nsIAppShellService); shell.quit(3); // eForceQuit
Bam! There goes Mozilla.
Then again, there's a much easier way; One of the xpcshell extensions is a quit function:
quit(3)