Date: Jul. 5, 2000
Link: http://www.oreillynet.com/pub/a/network/2000/06/30/magazine/mozilla_stylesheets.html
Source Author or Organization: Andrew Wooldridge, Mozilla Devcenter

In this tutorial the author explains the use of Mozilla User Style Sheets to take more control of the browser environment than is possible with skins, and touches on uses beyond customization, such as using style sheets to debug your XUL code.