Mozilla Developer Center

Visit the IRC channel: #extdev on irc.mozilla.org.

Need help? These documents should get you started:

• Firefox 1.5 for Developers - An overview of Firefox 1.5, including in-depth information on new features.
• MDC Extensions Page - Central resource for extension development information at the Mozilla Developer Center.
• Building an Extension - This tutorial walks you through the steps required to build a very basic extension for Firefox 1.5.
• Adapting a XUL Application for Firefox 1.5 - A collection of documents related to the changes required when adapting a XUL application for Firefox 1.5.
• Extension Packaging - Extensions are a form of Installable Bundle which can be downloaded and installed by a user, or provided pre-packaged with an application or by an external program. Extensions use a directory structure which can provide chrome, components, and other files to extend the functionality of a XUL program.
• Canvas Documentation at the MDC
• Drawing Graphics with Canvas
• Canvas Tutorial - As of this writing the Canvas Tutorial is still incomplete, but the content that is there is extremely useful.
• SVG Documentation at the MDC