Greasemonkey guide for Experienced Javascript Developers? [closed]

Question

I really really want to write a GreaseMonkey extension.

I have written a lot of javascript in my life.

I am looking for a guide that will tell me quickly, what exactly the GreaseMonkey environment is and does, from the perspective of someone who is familiar with everything going on in browser based Javascript.

I.e. no platitudes about how best to do things, or what has been done in the past, just a plain and simple, "this is what is going to happen to your code. " "This is the environment it will be executed in."

And I can't find one....

Answer 1

Dive into Greasemonkey is probably the best reference.

Also, Greasemonkey official docs may be helpful.