add:   dirChooser.displayDirectory = gDefaultProfileParent;  
context: function chooseProfileFolder(){  var newProfileRoot;    var dirChooser = C["@mozilla.org/filepicker;1"].createInstance(I.nsIFilePicker);  dirChooser.init(window, gProfileManagerBundle.getString("chooseFolder"),                  I.nsIFilePicker.modeGetFolder);  dirChooser.appendFilters(I.nsIFilePicker.filterAll);  dirChooser.show();  newProfileRoot = dirChooser.file;  // Disable the "Default Folder..." button when the default profile folder  // was selected manually in the File Picker.  document.getElementById("useDefault").disabled =    (newProfileRoot.parent.equals(gDefaultProfileParent));  gProfileRoot = newProfileRoot;  updateProfileDisplay();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/981e537817522592ff5ee9b5a7790515ae86b1e9/createProfileWizard.js/buggy/toolkit/profile/content/createProfileWizard.js