This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
Telephony object you can use to initiate and control telephone calls from the browser.
var phone = window.navigator.mozTelephony;
navigator.mozTelephony provides access to a
Telephony object that you can use to control the phone features of the device on which the browser is running.
For obvious reasons, support is primarily expected on mobile browsers.
|Feature||Chrome||Firefox (Gecko)||Internet Explorer||Opera||Safari|
|Basic support||Not supported||Not supported||Not supported||Not supported||Not supported|
|Feature||Android||Firefox Mobile (Gecko)||Firefox OS (Gecko)||IE Mobile||Opera Mobile||Safari Mobile|
|Basic support||Not supported||12.0 (12.0)||1.0.1||Not supported||Not supported||Not supported|