Reference Manual for FireFox (and other Mozilla) DOM Programming
We are currently finishing up an ASP.NET 1.1 application for one of our clients. One of the requirements was to support the FireFox browser. Now, ASP.NET does a good job of this - on the server. But where we ran into problems and incompatabilities with IE was with programming the DOM with Java script on the client.
Fortunately, my developer who was working on this tracked down the Gecko DOM Reference for the FireFox and other Mozilla-based browsers.
This is a good link to tuck away somewhere, because if/when you need it, you'll really need it...