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DeviceMotionEvent.acceleration

The acceleration property returns the amount of acceleration recorded by the device, in meters per second squared (m/s2).
API Device Orientation Firefox OS Mobile Motion NeedsExample Orientation Property

DeviceMotionEvent.accelerationIncludingGravity

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.
API Device Orientation Firefox OS Mobile Motion NeedsExample Orientation Property

DeviceMotionEvent.interval

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.
API Device Orientation Firefox OS Mobile Motion NeedsExample Orientation Property

FMRadio.onantennaavailablechange

Specifies an event listener to receive antennaavailablechange events. Those events occur when an antenna is plugged or unplugged.
API Firefox OS FMRadio API Property Reference WebFM

FMRadio.onenabled

Specifies an event listener to receive enabled events. Those events occur when the device's FM radio is turned on.
API Firefox OS FMRadio API Property Reference WebFM

FMRadio.onfrequencychange

Specifies an event listener to receive frequencychange events. Those events occur whenever the radio frequency is changed
API Firefox OS FMRadio API Property Reference WebFM

Idle API

The Idle API is used to notify an app when the user is idle. This lets an app take action when the user is doing nothing with his device. The most common use case is to save battery power; in this case, it is commonly used in conjuction with the Power Management API.
API Firefox OS Idle Non-standard Overview Reference

L10n.language.code

Returns the code of the currently active language.
API Firefox OS l10n Localization Property Reference Référence

L10n.language.direction

Returns the direction of the currently active language (ltr or rtl).
API Firefox OS l10n Localization Property Reference Référence