Can I link Firefox to Thunar?

[Todd and Margo Chester]

Hi All,

   I am running Firefox 2.0.0.9 and Thunar 0.8.0.

   In Firefox's download dialog box, there is
a right click selection of "Open Containing Folder".
Needless to say, it does not open Thunar.  Is there
a way to change it to Thunar?

Many thanks,
-T