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A hackable debugger for modern times, built from the ground up usingReact andRedux. It is designed to be approachable, yet powerful. And it is engineered to be predictable, understandable, and testable.

Mozilla created this debugger for use in theFirefox Developer Tools. And we've purposely created this project in GitHub, using modern toolchains. We hope to not only create a great debugger that works with theFirefox andChrome debugging protocols, but also develop a broader community that wants to create great tools for the web.

• Quick Setup
• Next Steps
• Getting Involved
• Documentation
• Discussion
• License

Or take a look at our detailedgetting started instructions.

First, get a recent version of Node.js to run the debugger.

curl -o- -L https://yarnpkg.com/install.sh| bash -sgit clone https://github.com/firefox-devtools/debugger.gitcd debuggeryarnyarn start# Go to http://localhost:8000

If you are having problems with setting breakpoints in the debugger, launchFirefox Nightly instead of clicking onLaunch Firefox.

• /claim anavailable issue. If you get stuck, we'd be happy tohelp.
• Do our getting started activityDebugging the Debugger.
• Read theapp overview, orcontributing guidelines.
• Watch avideo on contributing to the debugger, orlisten to a podcast about the project.
• Go to thefeatures board to see what we're working on.

This is an open source project, and we would love your help. We have prepared acontributing guide to help you get started.

If this is yourfirst PR, or you're not sure where to get started,say hi inSlack and a team member would be happy to mentor you.

We strive for collaboration withmutual respect for each other. Mozilla also has a set ofparticipation guidelines which goes into greater detail specific to Mozilla employees and contributors.

Have you found a vulnerability in the debugger and want to report it? In that case, takea look athow we handle security bugs, and open a bug atBugzilla so we can track the vulnerability while keeping users safe!

We strive to make the debugger as development-friendly as possible. If you have a question that's not answered in the guide, ask us inSlack. We also ❤️ documentation PRs!

Looking for our documentation? You can find ithere!

Ourweekly updates are also posted!

Say hello inSlack or in the #devtools-html channel on irc.mozilla.org.

• Community Call: Every Tuesday at 2 pm EST.Join the Hangout.
• DevTools Call: Every Tuesday at 12 pm EST.Join the DevTools Vidyo, or read the Meeting NotesGoogle Doc.
• Pairing: Ask inSlack and you'll either find someone, or be able to schedule a time for later.

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