I'll start this review with my conclusion: get this book. General users and network admins alike will find great benefit in this title. It is the missing manual that serves not only to introduce you to the product, but teach you the ins and outs of actually taking control of the browser and all of it's actions for not only yourself, but if your in a deployment position - for distribution to, and remote management of, others. Separated in to two parts, the entire text completes the FireFox picture for both developers and end users.
When it comes to how inclusive this title is, I'm not talking about the half-hearted attempts other like-books make for applications, where the reader is shocked to realize that 80% of it is graphical hand holding of the native menus and dialog boxes, rewording the tool-tips and associated help file when needed - this book really delivers. The first 100 pages are dedicated to making sure the reader understands the browser's makeup, understands, identifies, and can edit the configuration settings for native behaviors (quite often, when applicable, showing the one to one relationship with the graphical dialog or interface and the configuration setting), and setup / manage FireFox within a network environment. The remainder of the book deals popular browser extensions for both users and developers, CCS and DOM development, XML development, and the interaction with third-party tools and utilities one comes to expect from the "Hacks" series.
Don't think that just because FireFox is free and comes as trimmed down as possible, that there is nothing to it other than the obvious. A development goal was to make the browser's actions as transparent and accessible as possible, and the information available to the public. This title proves they succeeded, and you will find that this is the only book you will need to read to get the absolute most out of the browser.