Fizz is an exciting new effort by the chromium team aimed at making web applications first-class citizens on mobile by giving developers more powerful and safe capabilities to the web platform:

- Service Workers¹ provide a way for applications to reliably "go offline".
- Push API² used by application servers to send messages to web apps, whether or not the app is active in a browser window.
- Network Information API³ to access the underlying connection information of the device.
- Geofencing API⁴ makes it possible to be notified when a device enters or leaves specific regions.

¹ https://github.com/slightlyoff/ServiceWorker/
² https://dvcs.w3.org/hg/push/raw-file/tip/index.html
³ https://plus.google.com/+IlyaGrigorik/posts/QwTUPrcxyJp
https://docs.google.com/document/d/1f0YwJDRvoGko4OaD8gWJdmgLIPTMs_SiOd3rjHyd_Yo

Source: http://crbug.com/352648
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