I tracked down the source of Firefox Devtools' JSON viewer. https://github.com/mozilla/gecko-dev/tree/master/devtools/client/jsonview https://github.com/mozill

I tracked down the source of Firefox Devtools' JSON viewer. https://github.com/mozilla/gecko-dev/tree/master/devtools/client/jsonview https://github.com/mozilla/gecko-dev/tree/master/devtools/cl... It's based on React, but also uses require.js for its dependencies from other parts of Devtools, like TreeView - so it looks tough to separate into an independent component.