Visit the site and watch the videoAdd-Art is a free FireFox add-on which replaces advertising on websites with curated art images. The art shows are updated every two weeks and feature contemporary artists and curators. Learn more about Add-Art or install it now (instructions). Screencast below...
Firefox 3 compatible!
Add-Art is currently working in Firefox 3! You can see more updates to our development on our forums or sign up for our mailing list. Developers, contributions are welcome – get started at our development site.
http://add-art.org/