Hello,An addon that I use named nzbdStatus is licensed under the GPLv3 according to the web site http://www.nzbdstat.us/. The addon can be found at https://addons.mozilla.org/en-US/firefox/addon/nzbdstatus/. You may be able to include it in the list of free addons for IceCat.
Thanks, Brent S. [email protected] -- http://gnuzilla.gnu.org
