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. 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.
It was my understanding that The ESR versions of Firefox would continue to support Java through into 2018, but this has not been my experience.
Even though the Java runtime has been updated, the Firefox Mac OS X Java Plugin (MRJ Plugin) appears to remain vulnerable to the 'document.domain' bypass. By using the document.domain exception to the same origin policy, LiveConnect can be used to create arbitrary socket connections. Sun Java Runtime Environment fixes for Windows and Linux were. The Java Embedding Plugin uses the installed JVM which itself gets its proxy definitions from MacOS and not from Firefox. So, proxy definitions have to be defined for both MacOS/Safari and Firefox. I've also updated Firefox and selected Java 1.5 on the Java preferences panel.
Download Java For Firefox
For those reasons, Mozilla instituted only a partial block of the Java plug-in, limiting it to copies of Firefox running on Macs powered by OS X 10.5 or earlier. OS X 10.5 is better known as Leopard. Download Mozilla Firefox, a free Web browser. Firefox is created by a global non-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today! The Java Embedding Plugin is a utility that allows other web browsers than Apple's Safari to use the most recent versions of Java on Mac OS X. When used together with an updated version of Mozilla's MRJ Plugin Carbon (included in this distribution), the Java Embedding Plugin's functionality is currently available to recent versions of Firefox.
Are there any specific issues with these versions of Firefox that prevent Java Plugins from working, or is this an issue with that version of Java itself?
Java Plugin For Firefox Download
Firefox Browser Mac Os
Thanks!