rem: fp.setFilters(nsIFilePicker.filterAll); 
add: fp.appendFilters(nsIFilePicker.filterAll); 
context: function getFileOrFolderSpec( aTitle, aFolder ){  try {    var fp = Components.classes["component://mozilla/filepicker"].createInstance(nsIFilePicker);  }  catch(e) {    dump("*** failed to create fileSpecWithUI or fileSpec objects\n");    return false;  }  try {    var mode;    if (aFolder)      mode = nsIFilePicker.modeGetFolder;    else      mode = nsIFilePicker.modeOpen;    fp.init(window, aTitle, mode);    fp.setFilters(nsIFilePicker.filterAll);    fp.show();  }  catch(e) {    dump("Error: " + e + "\n");    return -1;  }  return fp.file;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/c165e6c65b89e212db918fabb409c6b4202ed9dd/prefutilities.js/buggy/xpfe/components/prefwindow/resources/content/prefutilities.js