Comment 5 for bug 195523

I have no idea how I should test that, since I already applied the fix mention by Matt H. As you can read in the link below, creating a link between the old firefox folder (where plugins are installed) and the new firefox-3.0 one, solved my problem.

https://answers.launchpad.net/ubuntu/+source/firefox/+question/25605

I'm sorry, but I don't think I can be of any further help here.