Mentioned earlier how to obtain these plugins, now I've uploaded a package that will configure them for your favourite browsers. You need to install the setup-commercial-plugins package, and it will do the rest.

By default it configures all three for Mozilla and Firefox (and I think Konqueror will pick up the plugins from one or other of them), but advanced users can choose to not have it set up specific plugins by editing /etc/sysconfig/commercial-plugins.