I had the same problem. I used the descriptions found here : http://www.linuxquestions.org/questions/answers/285 to make sure FC3 used the correct java (the how-to is for FC2 but it worked for FC3). After I had finished the installation, I logged on and off, and java worked in firefox. E -- This is an email sent via the webforum on http://fcp.homelinux.org