An extension for developers to inject custom cascading style sheets (CSS) into a web page. Stylebox allows you to quickly demonstrate different user interface and user experience designs of a web page. For example, follow these steps to see how the extension works: 1. Install the chrome extension 2. Go to: http://bit.ly/QGOFhX 3. Click the "Stylebox" extension 4. Use this stylesheet: http://bit.ly/Uw5n7o Source code available at : https://github.com/awoo/stylebox Also, a website design that successfully demonstrates a compatible & suitable design for all mobile devices: www.interestingbydefault.com