[Wlug] Mozilla

When I got home last night, I tried Mozilla again, and now I remember why I stopped using it. I had trouble trying to download the java plugin when I wanted to get into a chat room. After another failed attempt to download it with the browser, I tried gftp and got the file, jre131i.xpi but I have no idea what do do with it. There weren't any readme files nearby at the ftp site. Any ideas or suggestions are welcome. Thanks. Greg