...The extension operates in two modes - it can launch an instance of Chrome navigated to your app, or it can attach to a running instance of Chrome. Both modes require you to be serving your web application from a local web server, which is started from either a VS Code task or from your command line. Using the URL parameter you simply tell VS Code which URL to either open or launch in Chrome. Just like when using the Node debugger, you configure these modes with a .vscode/launch.json file in the root directory of your project. ...