We're back! (IN POG FORM)
* Insert about:config in the address bar * Right click on the list, select New, then Boolean; insert network.protocol-handler.external.ed2k as Preference Name and true as Value * Now another right click, select New and String; insert network.protocol-handler.app.ed2k as Preference Name and /path/to/ed2k (path to where the file is installed on your system) as Value. (taken from http://www.amule.org/wiki/index.php/Ed2k_links_handling#Mozilla_1.7_(or_later)_&_Firefox_0.9_(or_later))