Since Jamie proposed to use OpenJDK as an alternative: I don't know about Firefox 3.0, but OpenJDK doesn't work properly under FF 3.5 - see https://bugs.launchpad.net/ubuntu/+source/firefox-3.5/+bug/359407 - and doesn't work at all under FF 3.6 (it doesn't even show up under about:plugins). So much for alternatives ...
Since Jamie proposed to use OpenJDK as an alternative: I don't know about Firefox 3.0, but OpenJDK doesn't work properly under FF 3.5 - see https:/ /bugs.launchpad .net/ubuntu/ +source/ firefox- 3.5/+bug/ 359407 - and doesn't work at all under FF 3.6 (it doesn't even show up under about:plugins). So much for alternatives ...