Webtop: How to start just a single application instead of a whole desktop (Kiosk mode)

Hi There.

I am looking for a possibility to stream a single (desktop) application to a browser. I downloaded webtop Ubuntu XFCE flavor, got it running and I am impressed so far.

Can someone give me a hint how to reconfigure such a configuration to just start a single application instead of a whole desktop? Others say “kiosk mode”. :wink:

I already tried to configure ~./xinitrc, but it just doesn’t work. I think VNC has to be reconfigured here?

Thanks for any hint.

Regards
Alex