A little tweak to change the original RSS icon in Firefox urlbar/locationbar. This style is based on there.is.only.xul's "Custom RSS button image" (Custom RSS button image). Icons part of famfamfam's Silk icon suite (http://www.famfamfam.com/lab/icons/silk/), and i really want to thank them. I hope you enjoy. Thanks to dopiaza.org for the data: URI Generator for converting png, you can find it at http://www.dopiaza.org/tools/datauri/.
Andrea