I'm using Firefox 3.6 and the free version. I've enacted the steps listed on the Firefox plug-in page for version 3.6 and can see the 1.0.0.1 version of the plug-in enabled. However, the tools still do not work. I can see the javascript call down on the status bar when I hover over a link, but when I click on the link nothing happens. I have been able to get them to work in IE8 though.