rem: folderField.value = url; 
add: folderField.value = url.URLString; 
context: function prefCacheSelectFolder(){  dump("prefCacheSelectFolder \n");  bundle = srGetStrBundle("chrome://pref/locale/prefutilities.properties");  var folderField = document.getElementById("browserCacheDirectory");  var url = getFileOrFolderURL( bundle.GetStringFromName("cachefolder"), true );  if( url != -1 )    folderField.value = url;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/78f44199265608024538563baa55e9c619c8c413/pref-cache.js/buggy/suite/common/pref/pref-cache.js