XPages Extension Library
verion : ExtensionLibraryOpenNTF-900v00_03.20131001-1400
notes client : R853 FP 5
xe:namePicker is work well in web client link firefox but not work in notes client.
work in notes client r853 has a error message
"dojo.setAttr not a function"
It is probably best to match your 8.5.3 Notes client with the 8.5.3 ExtLib rather than you the 9.0 ExtLib.
If you still see the error following this do let us know.