- IcedTea + Firefox is the best combination for running java web applets under Linux.
- In order to get older java web apps to work you have to disable a bunch of security and encryption settings to get java to quite being so paranoid. However, don't be stupid and click sketchy java web apps on the internet once these settings have been disabled.
- Edit "java.security" under wherever your java is installed ie. /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/java.security
- Comment out "jdk.jar.disabledAlgorithms" and "jdk.tls.disabledAlgorithms" This disables the requirement for jars to be signed and allows java to connect to servers that use older encryption protocols like sslv3.