add: if (aCommand == "cmdEditCopy") { return new cmdEditCopy(); } 
context:   getCommand: function(aCommand)  {    return null;  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/4b41b02d306cdd78799d5a529fdcc667aa5e1ec4/computedStyle.js/buggy/extensions/inspector/resources/content/viewers/computedStyle/computedStyle.js