Java plugin free download - Java Embedding Plugin, Java Runtime Environment (JRE), Java Launcher, and many more programs. If it doesn't work and the wrong Java plugin appears to be loaded eg. IcedTea, then remove them in a shell: sudo apt-get remove icedtea-plugin sudo apt-get remove icedtea-8-plugin sudo apt-get remove icedtea-netx sudo apt-get remove icedtea-netx-common If Firefox or Java or audio in Java don't work, there may be missing dependencies.
Up until yesterday I've been using Firefox ESR 52.1.0 (64-bit) in order to access a VPN I need for work, which requires a Java plugin. Idm for android to download everything from internet. I'm also running Firefox Developer Edition 54.0a2 (2017-04-20) (64-bit).Yesterday I updated Java to 'Version 8 Update 131 (build 1.8.0_131-b11)', and I can longer use Java plugins on any version of Firefox, which means I can no longer access the VPN.