You can now use your web browser to both develop and troubleshoot your offline-enabled applications. You no longer need to use a mobile device. You can also verify business logic in simulated offline scenarios, and use standard developer tools for the browser, such as Tracer, the JavaScript console, and others.

Offline configuration section in Advanced tab for Access Group rule

For more information, see Troubleshooting offline-enabled applications with the Tracer tool in a browser and Application debugging using the Tracer tool.