IdentFavIcon is a Mozilla Firefox add-on based on the idea of Don Park to generate visually pleasing and easily recognizable icons from identifiers, such as IP addresses. I have used his algorithm to create this extension, which replaces the default favicon for web pages without one. The extension uses the CRC-32 code of the web page's domain name to seed the identicon renderer.

IdentFavIcon is hosted at addons.mozilla.org.