Firefox is a fast, reliable and private web browser from the non-profit Mozilla organization.
To learn how to contribute to Firefox read the Firefox Contributors' Quick Reference document.
We use bugzilla.mozilla.org as our issue tracker, please file bugs there.
- Firefox Source Docs is our primary documentation repository
- Nightly development builds can be downloaded from Firefox Nightly page
If you have a question about developing Firefox, and can't find the solution on Firefox Source Docs, you can try asking your question on Matrix at chat.mozilla.org in the Introduction channel.