When I open this URL from Firefox

http://jws.agenziaentrate.it/jws/dichiarazioni/2018/FEL18.jnlp

IcedTeaWeb start correctly.

But only after 10/15 minutes (!!) the application start and open it.
This is not acceptable.

I discovered that this problem happens even if I launch the procedure by hand

/usr/bin/javaws  http://jws.agenziaentrate.it/jws/dichiarazioni/2018/FEL18.jnlp

This is the command used from firefox (I see with "ps -fea|grep java").

After some try, I also discovered that if I run javaws with -noupdate option

/usr/bin/javaws   -noupdate  http://jws.agenziaentrate.it/jws/dichiarazioni/2018/FEL18.jnlp

the application start and open immediately.

It's possible to set this options so that firefox use it?

Someone can help me to resolve this issue?
Many thanks

--
Dario Lesca
(inviato dal mio Linux Fedora 29 Workstation)