The vibrate read-only property of the Notification interface specifies a a vibration pattern for the device's vibration hardware to emit when the notification fires. This is specified in the vibrate option of the Notification() constructor.
The @viewport CSS at-rule contains a set of nested descriptors in a CSS block that is delimited by curly braces. These descriptors control viewport settings, primarily on mobile devices.
CSS Device Adaptation is a CSS module that allows to define the size, zoom factor, and orientation of the viewport.
An event handler for the deviceorientation event, which contains information about a relative device orientation change.
The BatteryManager interface provides ways to get information about the system's battery charge level.
Increasingly, web-enabled devices are capable of determining their orientation; that is, they can report data indicating changes to their orientation with relation to the pull of gravity. In particular, hand-held devices such as mobile phones can use this information to automatically rotate the display to remain upright, presenting a wide-screen view of the web content when the device is rotated so that its width is greater than its height.
A DeviceAcceleration object provides information about the amount of acceleration the device is experiencing along all three axes.
The acceleration property returns the amount of acceleration recorded by the device, in meters per second squared (m/s2).
The accelerationIncludingGravity property returns the amount of acceleration recorded by the device, in meters per second squared (m/s2). Unlike DeviceMotionEvent.acceleration which compensates for the influence of gravity, its value is the sum of the acceleration of the device as induced by the user and the acceleration caused by gravity.
Returns the interval, in milliseconds, at which data is obtained from the underlaying hardware. You can use this to determine the granularity of motion events.
Indicates whether or not the device is providing orientation data absolutely (that is, in reference to the Earth's coordinate frame) or using some arbitrary frame determined by the device. See Orientation and motion data explained for details.
Returns the rotation of the device around the X axis; that is, the number of degrees, ranged between -180 and 180,  by which the device is tipped forward or backward. See Orientation and motion data explained for details.
The navigator.mozAudioChannelManager object provides access to the mozAudioChannelManager interface, which is used to manage your Firefox OS device's audio channels, including setting what channel's volume to affect when the volume buttons are pressed inside a particular app.
The getBattery() method provides information about the system's battery, returns a battery promise, which is resolved in a BatteryManager object providing also some new events you can handle to monitor the battery status.. This implements the Battery Status API; see that documentation for additional details, a guide to using the API, and sample code.
The navigator.mozAudioChannelManager object provides access to the mozAudioChannelManager interface, which is used to manage your Firefox OS device's audio channels, including setting what channel's volume to affect when the volume buttons are pressed inside a particular app.