Debugger

The faster and smarter Debugger for Firefox DevTools 🔥🦊🛠

From firefox-devtools·Updated June 16, 2026·View on GitHub·

·Archived

The Firefox Debugger is now maintained in Mozilla's central repository. The project is first published in 2016. It has gained significant community traction with 4,608 stars and 747 forks on GitHub. Key topics include: chrome, debugger, devtools, firefox, flowtype.

Latest release: v36

April 13, 2018View Changelog →

Firefox Debugger

The Firefox Debugger is now maintained in Mozilla's central repository.

Visit docs to learn how to contribute
Checkout our dashboard to find good first bugs.
Go to bugzilla to report an issue or suggest an enhancement.
Feel free to ask questions at any point on Matrix

debugger-screenshot

Thank You

The Firefox Debugger was built in Github for the first 3 years of its development. Over 300+ volunteers contributed thousands of commits and built many of the features we take for granted today.

We hope to continue that spirit today in Mozilla Central. We believe the Debugger can be a great place to collaborate on the next iteration of developer tools. And, that everyone regardless of background or experience can contribute work of significance.