Introduction
Read now
Dive Into Greasemonkey is a book about programming with Greasemonkey, a Firefox extension for customizing web pages. Read it online for free.
Confused already? Start with What is Greasemonkey?
Read later
Dive Into Greasemonkey is a free download, available in a variety of formats. The current version was published on May 9, 2005.
2005-12-05: I am actively working on updating this book for the latest versions of Greasemonkey and Firefox. Until it's ready, please read Avoid Common Pitfalls in Greasemonkey: How the History of Greasemonkey Security Affects You Now.