Firefox is a pretty nice browser in its own right, but one of the things that makes it so useful is the huge range of add-ons available. You can use add-ons to customize the way Firefox behaves, or to add new features to the browser.
There are hundreds of add-ons that can help you as a Web designer or developer — there’s a full list on the Mozilla website. In this article I’ve attempted to distil the list down to the 10 add-ons that I find most useful as a webmaster. I’ve ranked them in approximate order of importance — the ones near the top of the list are the ones I use most often.
Enjoy — and if you have any suggestions please post a response below!