Sorry, was at work and couldn't remember the names exactly. It is actually ForecastFox http://forecastfox.mozdev.org/
Very cool extension for weather junkies like me. The other is actually called Greasemonkey http://greasemonkey.mozdev.org/ Greasemonkey lets you take little bits of DHTML and apply them to every page you visit or specific pages. There are hundreds of useful little scripts people have put together than you can use. -- Brian
