How to Use This Book
You can read this book from cover to cover if you like, but each hack stands on its own, so feel free to browse and jump to the different sections that interest you most. If there's a prerequisite you need to know about, a cross-reference will guide you to the right hack.
Like most books, you can, if you want, start at the front and end at the back. If you know nothing about Firefox at all, the earliest material will ease you into the technology. If you're a hacker extraordinaire, then leap to the last few chapters where the hard stuff is. Overall, this book has something for everyone, so start with the chapter that's aimed at your particular needs first.