The articles below include content about downloading and building Mozilla code. In addition, you'll find helpful articles about how the code works, how to build add-ons for Mozilla applications, and the like.

Developer guide
There are lots of ways to contribute to the Mozilla project: coding, testing, improving the build process and tools, or contributing to the documentation. This guide provides information that will not only help you get started as a Mozilla contributor, but that you'll find handy to refer to even as an old hand.