Add-Art is a Firefox extension which replaces advertising images on web pages with art images from a curated database. It is a free and open source project, currently being developed at the Eyebeam Development site. Of the 100+ add-ons available for Firefox, "adblockers" are the most popular. The most current, Adblock Plus, has over 18 million downloads (as of May 2008) since Jan 2006 (currently