You can then access http://localhost:9222/ which shows a list of all pages currently open on your device, which link to a page on http://chrome-devtools-frontend.appspot.com/ for example http://chrome-devtools-frontend.appspot.com/static/16.0.912.... which in turn connects to a websocket on localhost like ws://localhost:9222/devtools/page/2 to debug your mobile browser!
You can then access http://localhost:9222/ which shows a list of all pages currently open on your device, which link to a page on http://chrome-devtools-frontend.appspot.com/ for example http://chrome-devtools-frontend.appspot.com/static/16.0.912.... which in turn connects to a websocket on localhost like ws://localhost:9222/devtools/page/2 to debug your mobile browser!