“Mozilla developers have landed some interesting new mobile
features for the upcoming Firefox 11 for Android release. The new
features will enable the browser to take full advantage of
underlying hardware features, including the ability to vibrate, use
a camera, check battery status and send an SMS.“Web apps, just like native ones, need a way to send feedback to
various sensors – including notification vibes,” Mozilla Developer
John Hammink wrote. “The W3C spec lays a foundation, which we’ve
implemented. Note that you’ll need a device with a vibrator to test
this one.”