If you have upgraded your Firefox web browser to version 10 the add-on named “Firefox Recording Extension” is reported as incompatible. Resolution: first uninstall the add-on in the web browser. After restarting the browser enter
into Firefox. This will install the latest version 2.6 of the “Firefox Recording Extension” which is compatible to Firefox version 10 as well as to Firefox version 9, 8, 7, 6, 5, 4 and 3.