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.

This API is available on Firefox OS for privileged or certified applications only.

The getVolume() method of the HTMLIFrameElement gets the current volume of the browser <iframe>.


There are two versions of this method, a callback version:

var request = instanceOfHTMLIframeElement.getVolume();

and a Promise version:

instanceOfHTMLIframeElement.getVolume().then(function(volume) { ... });


  • Callback version: A DOMRequest that represents the get volume request. It has an onsuccess handler to handle the success case, and an onerror handler to handle the failure case. The volume value is available in the request.result property, and is a floating point number between 0 and 1.
  • Promise version: A Promise that resolves with the volume value — a floating point number between 0 and 1.




Callback version:

var browser = document.querySelector('iframe');

var request = browser.getVolume();

request.onsuccess = function() {
  console.log('The current browser volume is ' + request.result);

Promise version:

var browser = document.querySelector('iframe');

browser.getVolume().then(function(volume) {
  console.log('The current browser volume is ' + volume);


Not part of any specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support Not supported Not supported Not supported Not supported Not supported
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support Not supported Not supported 2.5 Not supported Not supported Not supported

Note: Use of the Browser API requires a privileged app, and browser and/or embed-apps permissions, depending on what you want to do. See Using the Browser API for more details.

See also


© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

API B2G Browser Firefox OS getVolume HTMLIFrameElement Method Non-standard Reference