Java for Firefox/

[#1]

In the course of collecting data on Broadband performance I tried BT Speedtester which told me that I do not have Java as a part of my browser. Years ago I remember installing an ad-on in FF but cannot find it any more. Any clues out there?

[#2]

I am running "sun-java6-plugin" in Firefox 3.6.17 on Ubuntu 10.10
[quote=Synaptic Package Manager]
The Java(TM) Plug-in, Java SE 6
Java Plug-in enables applets written to the Java Platform 6
specification to be run in Mozilla and other web browsers.
Java Plug-in comes with the Java Runtime Environment (JRE).

[#3]

I also seem to have loaded "icedtea6-plugin"
[quote=Synaptic Package Manager]web browser plugin based on OpenJDK and IcedTea to execute Java applets
IcedTeaPlugin is a web browser plugin to execute Java applets, supporting
LiveConnect/JavaScript. It is targeted for xulrunner-1.9 and compatible
browsers that support the NPAPI.

[#4]

me too.

[#5]

Thanks lads, all is well.
I found a battery of icedtea and associated Java like things on Synaptic and duly installed them. FF3 liked that and speedtester.bt.com did as well. Funnily enough Googleing only found a lot of related stuff, largely commercial equivalents but not the exact IRL ()which I had forgotten). I find t surprising that the Update Manager did not bring up icedtea etc in the normal way.