Contributing to Firefox
What to install before the workshop
Follow the instructions in the "Build prerequisites" and "Get the source" sections here: https://developer.mozilla.org/en-US/docs/Simple_Firefox_build
How to contribute
Here's the guide for first-time contributors to Firefox: https://developer.mozilla.org/en-US/docs/Introduction
Introductory tickets are here: http://www.joshmatthews.net/bugsahoy/?unowned=1&simple=1