A JNLP file is a special XML file send as type applicationx-java-jnlp-file.

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I understand Firefox ESR 52 still supports java applets, and ive downloaded version 52.9.0esr and extracted it to its own location.

Now i can start it without interferin with my v60 profile by running it like:.firefox --no-remote --profile.

I dont know why more recent Java plugin versions arent detected.

In current Firefox releases you need a JNLP (Java Web Start) file to launch a java application.

I put a link to jre1.8.0221libamd64 libnpjp2.so in.mozillaplugins and it showed right up in about:plugins.

Also had to run the jre1.8.0221binControlPanel from the command line so I could add a security exception for the site, but after that the applet loaded right up and I was able to complete the devices configuration.

I put a link to jre1.8.0221libamd64libnpjp2.so in.mozillaplugins and it showed right up in about:plugins.

But the plugin is still not show in about:plugins in the Mozilla Browser and not working in the browser is also checked about:config.

Websites need to use Java Web Start (file extension.jnlp) to launch Java applications in a standalone window in current Firefox releases.

I have Icedtea-Web running in Ubuntu but still can detect the jnlp file.

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