*** Storage: https://github.com/mozilla-b2g/gaia/blob/master/apps/settings/js/app_storage.js
** Environment:
*** Ambient Light: http://www.w3.org/TR/ambient-light/
*** Proximity: http://www.w3.org/TR/2012/WD-proximity-20120712/ - https://hacks.mozilla.org/2013/06/the-proximity-api/
*** Storage: https://github.com/mozilla-b2g/gaia/blob/master/apps/settings/js/app_storage.js
** Environment:
*** Ambient Light: http://www.w3.org/TR/ambient-light/
*** Proximity: http://www.w3.org/TR/2012/WD-proximity-20120712/ - https://hacks.mozilla.org/2013/06/the-proximity-api/