KDE dialog for file operations in Firefox howto?

[Gergely Sánta]

Hello,

I'm trying to configure Firefox for KDE KIOSK session in CentOS (with
older KDE: 3.4). I'm trying to force Firefox to use KDE's file open/save
dialog (which applies some of KIOSK restrictions I need), but I did not
succeed yet.
I see in Kubuntu, that Firefox uses KDE dialog there.. How did You do
that? Could somebody help me to configure Firefox  for the same results?

Thanks in advance,
Gergely