Comment 30 for bug 173966

i concur. this was also the case in gutsy with firefox 2.

on a default install, i added the java6 mozilla plugin, but it was not listed in about:plugins under firefox 3 beta.

i had to create a symbolic link in ~/.mozilla/plugins for it to work. this would be very frustrating for newbies as all the gui windows indicated that the plugin was installed correctly, however firefox never picked it up from the /etc/alternatives/ directory or the symbolic link under /usr/mozilla/plugins (or similar?)