This blog describes how I installed firefox 15.0.1 with java jre-7u7 and flash 11.2 on a CentOS 5.8 host. None of the installation commands were distro specific so it should work on any linux system.
This technique allows you to test different versions of firefox/java/flash without interfering with your system defaults. It also allows you to install a centralized version that can be shared by other users.
Continue reading Install firefox 15.0.1 with flash and java support on linux