If you’re new to Firefox extension or XULRunner programming, one of the first things you may want to do is find a good tutorial to help get a “hello world” project bootstrapped. Mozilla Developer Center (MDC) has more than a few to help you get started: Firefox Sidebar, Firefox Statusbar, XULRunner Application. We are working to get more on the way too.
If there is something you want to know how to do, but it’s not on the MDC yet, let me know. Also, for any of you experienced Mozilla developers out there, go check out the code snippets and please add some of your own. Just keep the code snippet short and sweet, we’re not writing a full sample extension or application. If you do want to write a large sample extension or application, create a full blown tutorial.