rem: try { return getMIMEService().getFromTypeAndExtension(aMIMEType, aExtension); } catch (e) { 
add: if (aMIMEType || aExtension) { try { return getMIMEService().getFromTypeAndExtension(aMIMEType, aExtension); } catch (e) { } 
context: function getMIMEInfoForType(aMIMEType, aExtension){  try {      return getMIMEService().getFromTypeAndExtension(aMIMEType, aExtension);  }  catch (e) {  }  return null;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/d08f7a07e91bf56a4bdbf2b57c87a782c0d3cbe6/contentAreaUtils.js/clean/browser/base/content/contentAreaUtils.js