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First, run the FireFox installer for Linux. I typically choose to install it at /usr/local/firefox-n.n.n where the n's are replaced with the version number. I will then typically create a symbolic link called /usr/local/firefox to point to that folder, and have my desktop shortcut point to the browser runtime using that symbolic link to the folder.

Java RPMs from java.sun.com will typically not install Java support on these browsers by default. Once you do install the JDK (or the JRE, but I am using the JDK in this document), you will need to find the plugin library and symbolic-link to it from the firefox/plugins directory.

For example, the plugin may be found at usr/java/jdk1.5.0_01/jre/plugin/i386/ns7/libjavaplugin_oji.so, so the command:

ln -s /usr/java/jdk1.5.0_01/jre/plugin/i386/ns7/libjavaplugin_oji.so /usr/local/firefox/plugins/libjavaplugin_oji.so

should do the trick.