add: scriptLoader.loadSubScript("chrome: 
context: function loadScripts(){  var scriptLoader =  Components.classes["@mozilla.org/moz/jssubscript-loader;1"]                     .getService(Components.interfaces.mozIJSSubScriptLoader);  if (scriptLoader)  {     scriptLoader.loadSubScript("chrome://messenger-newsblog/content/Feed.js");    scriptLoader.loadSubScript("chrome://messenger-newsblog/content/FeedItem.js");    scriptLoader.loadSubScript("chrome://messenger-newsblog/content/file-utils.js");    scriptLoader.loadSubScript("chrome://messenger-newsblog/content/utils.js");  }  gExternalScriptsLoaded = true;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/5ecb05ff263bc78940083e04cb1d43b3fbe97b91/newsblog.js/clean/mail/extensions/newsblog/js/newsblog.js