This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
FMRadio object you can use to access to the device FM radio.
var WebFM = navigator.mozFMRadio;
navigator.mozFMRadio is a
Not part of any specification.