A DESCRIPTION OF THE REQUEST :
Several javafx and prism properties cannot be used with Java Web Start.

Predefined Secure Properties supported by the JNLP Spec
https://docs.oracle.com/javase/9/deploy/jnlp-file-syntax.htm#JSDPG-GUID-5C5E3A20-416B-46E0-A279-D31D48E430BA

Please add the following properties to the JNLP Spec:
-Djavafx.verbose
-Djavafx.autoproxy.disable
-Dprism.verbose
-Dprism.order

JUSTIFICATION :
It is not possible to change the prism order when running Java Web Start.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Setting -Dprism.order=sw should choose software rendering.
ACTUAL -
The prism rendering es2 is choose by default.