Cc-fx is a project mainly written in JAVASCRIPT and SHELL, it's free.
DO NOT USE; this has been moved to https://github.com/nyergler/openattribute-firefox
The Creative Commons Firefox Add-on (CC-FX) adds support for displaying license and attribution information for works as you browse. If the page or items on the page are licensed, a CC icon will appear in the URL bar, which can be clicked to display the author and license information (if available).
This add-on is the successor to MozCC and was initially developed with support from Google Summer of Code.