Greasemonkey is a powerful Firefox add-on that lets you change the appearance and functionality of almost any page on the web. Most people don't know how to write Javascript, though, so we end up using the Greasemonkey scripts developed by other people who do. There are lots and lots of scripts that have been written and they are fun, useful and easy to run.
It's been downloaded nine million times, but we believe many people still haven't heard of or taken the time to learn how to use Greasemonkey. We think they are really missing out, so we recorded a 4 minute screencast showing you how to use the program and some things we like to do with it. We hope readers will add comments with some of your favorite Greasemonkey scripts for people to check out as well.
What Is Greasemonkey?
Greasemonkey is a Firefox plug-in that allows you to insert Javascript into the local display of web pages in your browser. Nothing changes for anyone else, but images, links or text can be added or hidden automatically when you visit a web page that a script has been written for.