Fire works is a prototyping program that enables you to create a sophisticated mock up of your site that can be transferred into other programs like flash catalyst & Dreamweaver. Fire records some html & css code in the back ground that will save you time when it comes to actually building your site. You can interact with the test run of your fireworks file so that when you show your client where you are with the design or if you are building the site for yourself, you can get a virtual view of how the end product will operate.
Fireworks can be used to create simple graphics, such as icons and buttons. Fireworks can also be used to edit photos to some extent.