Show multiple screens once, Responsive design tester

A Chrome extension to show multiple screens in one view. the extension will help front-end developers to test multiple screens while developing responsive websites/applications.

icon by Dima Hamayunau (https://dribbble.com/abybe).

Clarification on privacy: 
The extension does not track or collect any of your data, it's even not connected to any server to store data.

Source code:
https://github.com/skmail/responsive-viewer"