One of the most powerful features of Adobe Fireworks is that you can extend its functionality. Almost anything you can do through Fireworks’ interface — and even some things that you can’t — can also be achieved by writing a simple JavaScript extension.
Fireworks extensions are of two main types: commands and command panels. If you find yourself repeatedly performing a tedious task, you could write a command to automate the process and save yourself a lot of time. Alternatively, if you are missing a particular feature that would improve your workflow, you could write a more complex extension — a command panel — to implement it.