since ubuntu base my favorite for my desktop environtment its difficult for me, if i need to support ASA Firewall which use Java for their ASDM.  the bad thing is Firefox no longer support for JAVA (NPAPI plug-ins.) so I used ESR Firefox to support my need

  1. prerequsite : Download Java and Download ESR Firefox from https://www.mozilla.org/en-US/firefox/organizations/all/ >> choose LInux 64 bit
  2. Install Java
    -copy downloaded JRE to /opt

     cp -v jre-8u151-linux-x64.tar.gz /opt

 sudo su

    – change folder to /opt and extract
    cd /opt/

     tar -xzvf jre-8u151-linux-x64.tar.gz

    – Optional for me easy to manage if I simple rename Java folder to JAVA

     mv jre-8u151-linux-x64 JAVA

    – to logout from root

     exit
  3. install JAVA PATH : 
    echo JAVA_HOME="/opt/JAVA/bin/java" >> /etc/environtment
  4.  enable java for our firefox 
    mkdir -p ~/.mozilla/plugins/

ln -s /opt/JAVA/lib/amd64/libnpjp2.so ~/.mozilla/plugins/
  5.  Extract our Downloaded Firefox
cd Downloadtar -xjvf firefox-52.5.0esr.tar.bz2
cd firefox.\firefox-bin

reload our firefox and associate jnlp file tou firefox to using /opt/JAVA/bin/javaws/
tools >> preferences >> application >> search for JNLP File : use javaws

I also need to try browser that java Support something like : seamonkey, palemoon,etc

but for now I can use my Ubuntu for manage my ASA Firewall.