It's a browser extension that modifies the netflix page in-browser. There is a difference between Chrome extensions and Chrome apps, extensions run in the backg

It's a browser extension that modifies the netflix page in-browser. There is a difference between Chrome extensions and Chrome apps, extensions run in the background and usually provide an icon with information or modify pages or perform some resident task. The apps are, somewhat as you say, a glorified webpage making use of special chrome APIs [1] to offer functionality that is not possible on regular web pages. [1]: http://developer.chrome.com/apps/api_index.html http://developer.chrome.com/apps/api_index.html