rem: messenger.loadURL(window, url); 
add: messenger.launchExternalURL(url); 
context: function loadThrobberUrl(urlPref){    var url;    try {        url = gPrefs.getComplexValue(urlPref, Components.interfaces.nsIPrefLocalizedString).data;        messenger.loadURL(window, url);      } catch (ex) {}}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/ba51e41b2241f777489d3d575d290f915a42ce77/mailWindowOverlay.js/clean/mail/base/content/mailWindowOverlay.js