Both javaws and browser JVM will pass -Dsun.awt.warmup=true to initiate initialization of D3D in a way AWT toolkit can pick it later.
That helps to save up to 100ms of startup time but in case of FX this warmup is almost useless (at this moment).
We should only request it for for AWT toolkit. If we know we gonna need FX toolkit we should not pass this property
Fixed with changeset: