Mozilla Firefox Project
Firefox 3 - Gran Paradiso Planning Center.
The Firefox 1.0 Charter outlines the reasons behind this project, and its goals.
Downloading Firefox Source Code
Firefox-specific source lives under "mozilla/browser", "mozilla/toolkit", and "mozilla/chrome" in the repository.
How to Build Firefox - instructions and configuration.
Localize Firefox - instructions.
Firefox Extensions - development notes for the new Extensions system.
quality.mozilla.org - testing platform. Work in progress.
QA Tests for various features. Deprecated.
User Interface documentation and specifications.
1.0 Development Roadmap - outlines milestones and strategy in releasing Firefox 1.0.
2.0 Development Roadmap - outlines 2.0 plans and priorities.
Shell Integration - a cross platform shell integration system.
We always need Heavy Lifters in code. If you're excited about web browser technology, why not get involved in the premier Open Source browser project? We're especially looking for people with skills in Mac OS X programming and Windows developers. Get started today by finding and fixing something. Instructions are not provided here since figuring out how to do all of this can be considered part of the "entry requirements". ;-)