Although Mozilla's major, core projects are located on the Mozilla Mercurial server, such as mozilla-central, there are a number of tools, services, and so forth whose code is hosted on GitHub. This article offers a quick guide to getting started with Mozilla code on GitHub as well as a list of many of the most interesting GitHub repositories containing Mozilla project code.
Getting started
You can look at code on GitHub without an account; that's the first thing you should know. To do more—that is, to contribute to the code or to fork it and start your own project based on Mozilla-related code—you'll need a GitHub account. You can learn more about setting up an account on the GitHub site.