Grok extensions, set up your development environment, and make your first one. We'll explain how extensions integrate into Firefox and what they can do, show you how to set up an environment to ease their development, and walk you through the making of a simple "Hello World!" extension. Bring your laptop and prepare to follow along. By the end of this session, you'll be an extension developer.

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More videos from the Mozilla Labs Design Challenge - Spring 09:

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