<http://schema.org/description>
"Add-ons have a major role in making Firefox one of the most popular web browser. It add bells and whistles to Firefox. Here are some interesting Firefox add-ons. DownthemAll DownThemAll is a Mozilla Firefox extension that adds new advanced download..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://blog.j15h.nu/must-have-firefox-addons/>