rem: var promptService = nsJSComponentManager.getService("@mozilla.org/embedcomp/prompt-service;1", "nsIPromptService"); return promptService.Confirm(window, titleMsg, dialogMsg); 
add: var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].getService(Components.interfaces.nsIPromptService); return promptService.confirm(window, titleMsg, dialogMsg); 
context: function ConfirmUnsubscribe(folder){    if (!gMessengerBundle)        gMessengerBundle = document.getElementById("bundle_messenger");    var titleMsg = gMessengerBundle.getString("confirmUnsubscribeTitle");    var dialogMsg = gMessengerBundle.getFormattedString("confirmUnsubscribeText",                                        [folder.name], 1);    var promptService = nsJSComponentManager.getService("@mozilla.org/embedcomp/prompt-service;1", "nsIPromptService");    return promptService.Confirm(window, titleMsg, dialogMsg);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/195816bd8ff89657b37fb4c7de9648e391c85d48/mailWindowOverlay.js/buggy/mailnews/base/resources/content/mailWindowOverlay.js