rem: get Sanitizer() 
add: get prefService() 
context:   get Sanitizer()   {    if(typeof(Sanitizer) != "function") { // we should dynamically load the script      Components.classes["@mozilla.org/moz/jssubscript-loader;1"]                .getService(Components.interfaces.mozIJSSubScriptLoader)                .loadSubScript("chrome://browser/content/sanitize.js", null);    }    return Sanitizer;  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/b05089efa8c30b81eaa361af793e52bb7f1e856b/nsBrowserGlue.js/buggy/browser/components/nsBrowserGlue.js