Firefox and Thunar

[Todd and Margo Chester]

Hi All,

     I am running firefox3-3.0-0.20080530.rc2.fc7.remi.i386.rpm on
CentOS 5.1 with XFce 4.4.2.

     What is the about:config command to tell FF3 to use Thunar, instead
of Nautlis as my file manager?   "network.protocol-handler.app.file"
does not seem to work anymore.  :-(


Many thanks,
-T