"Greasemonkey is a Firefox extension which lets you to add bits of DHTML ('user scripts') to any web page to change its behavior. In much the same way that user CSS lets you take control of a web page's style, user scripts let you easily control any aspect of a web page's design or interaction.
For example, you could:
* Make sure that all URLs displayed in the browser are clickable links
* Improve the usability of a site you frequent
* Route around common and annoying website bugs
* Use the Coral content network selectively."
