Start here: CONTRIBUTING.md

Building Graphene

• Building Graphene (Servo flavor)
• Building Graphene (Gecko-flavor)

Remote Devtools in Gecko Graphene

If you're running the Gecko runner for the first time, you'll have to enable remote debugging.

Hit f12 (fn f12 on Mac laptop keyboards) to open the developer settings panel:

Next, open WebIDE in Firefox and click "Remote Runtime". Devtools runs on port 6000: