rem: var addrbookSession = Components.classes["@mozilla.org/addressbook/services/session;1"].getService().QueryInterface(Components.interfaces.nsIAddrBookSession); 
add: var addrbookSession = Components.classes["@mozilla.org/addressbook/services/session;1"] .getService(Components.interfaces.nsIAddrBookSession); 
context: function OnUnloadAddressBook(){    var addrbookSession = Components.classes["@mozilla.org/addressbook/services/session;1"].getService().QueryInterface(Components.interfaces.nsIAddrBookSession);  addrbookSession.removeAddressBookListener(gAddressBookAbListener);  RemovePrefObservers();  CloseAbView();}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/a64162191e73cb022e03aa62edbdca9520b7ae8d/addressbook.js/buggy/mail/components/addrbook/content/addressbook.js