java plug-in not working

[engine]

Firefox 50.0 on lubuntu 16.0.4

java installed:
me@myPC:~$ whereis java
java: /usr/bin/java /usr/share/java
/usr/lib/jvm/java-8-oracle/bin/java
/usr/lib/jvm/java-8-oracle/jre/bin/java
/usr/share/man/man1/java.1.gz

Java plug-in 11.111.2 for Mozilla browsers set to 'always activate'

… but the "Verify Java version" page https://www.java.com/en/download/installed8.jsp does not respond, a support chat system that I know needs java is not working, and webHelps using jquery for navigation do not display correctly

I'm hoping there's something simple I can do! and look forward to helpful suggestions.

[Keith_Helms]

whereis java is just showing you the standalone jvm. To install the java plugin in firefox, run this command

sudo apt-get install icedtea-plugin

[engine]

Thanks! that's solved the problem with the webHelps; I'll check the chat system tomorrow.

[engine]

chat system still not working; https://www.java.com/en/download/installed8.jsp not working either :-{ I've (accidentally) opened a new thread with a bit more information; sorry for the confusion.