You can set up your web app to have an application shortcut icon added to a device's homescreen and have the app launch in full-screen "app mode". Web apps launched will appear in the task switcher. Web apps will launch full-screen with no vestiges of a browser. The URL will not be present nor will traditional browser actions such as bookmarking and navigation controls. You can also configure pages and windows by matching the URL of the page.

Source code: https://github.com/drunlin/webappbox