Working on Firefox

Welcome to the Firefox codebase. This is the home of the Firefox development process and source code documentation.

Making Changes To Firefox

• Firefox Contributors’ Quick Reference
• Working with stack of patches Quick Reference
• Pocket Guide: Shipping Firefox
• Editor / IDE integration
• Getting reviews
• Levelling up
• How to submit a patch

Code reviews

• Code Review FAQ
• Reviewer Checklist

The Mercurial Version Control System

• Mercurial Overview
• Mercurial Bundles

Debugging

• Capturing a minidump
• Debugging A Hang On macOS
• Debugging A Minidump
• Debugging Firefox with GDB
• Debugging Firefox with LLDB
• Debugging Firefox with rr
• Debugging Firefox with Valgrind
• Debugging On macOS
• Debugging On Windows
• Symbolicating TreeHerder stacks locally
• How to get a process dump with Windows Task Manager
• How to get a stacktrace for a bug report
• How to get a stacktrace with WinDbg
• Understanding Crash Reports

Additional Information

• Firefox Source Code Directory Structure
• Understanding Artifact Builds
• Firefox for Mobile Devices
• Supported Build Hosts and Targets
• Engineering Show and Tell
• Filing good bugs