This API is available on Firefox OS for internal applications only.
Summary
Returns a SettingsManager object you can use to access and change the device's settings.
Syntax
var settings = window.navigator.mozSettings;
Value
navigator.mozSettings is a SettingsManager object you can use to access and change the device's settings.
Specification
Not part of any specification yet; however, this API will be discussed at W3C as part of the System Applications Working Group.