Firefox Java Plugin
Yeah, 2015 and this isn't a solved problem.
Problem
Java in Firefox. CentOS 6.6, 64-bit.
Solution
This worked for me:
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u45-b14/jdk-8u45-linux-x64.rpm"
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u45-b14/jre-8u45-linux-x64.rpm"
# rpm -ivh j*rpm
# alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jdk1.8.0_45/jre/lib/amd64/libnpjp2.so 20000
Now all I have to do is deal with Java.