IcedTea Java Console not available in Firefox

There are some posts about this on the internet but I have not managed to get this to work with the openJDK. I am using Firefox 3.6.13 and have the IcedTea Java plugin 1.9.2 (6b20) installed. I also have the Web Developer plugin (1.1.8) for Firefox. There is an option under Web Developer to open the Java console (Tools | Web Developer | Tools | Java Console) but this appears to do nothing. The short cut sequence (ctrl-shift-O) happens to be the same as that to open bookmarks in Firefox and that's what you get when you press it (I couldn't find a way of disabling that to see if that might help). I need the Java console to see my logging in my Java applet as something is going wrong. Someone suggested in an internet post that starting Firefox from a terminal box would print the console information in the terminal but I saw nothing when I tried.

Thank you.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: openjdk-6-jre 6b20-1.9.2-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.35-23.41-generic 2.6.35.7
Uname: Linux 2.6.35-23-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Wed Dec 15 10:59:36 2010
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027.1)
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: openjdk-6