Steps to reproduce:
Download 3 files
* AppletPage.html
* math_applet.jnlp
* MixedJS.jar
from
http://stt-13.ru.oracle.com/export/home0/tmp/felix/reproduce/JDK-8023874/test_16824984/MixedFix/JS/signed_allpermissions/
Try to run html locally. file://somepath/AppletPage.html
Accept first security warning.
On second warning about JS to Java calling you can see only "file://" record in host name.
I think it is not quite correct behavior.