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 getMuted() method of the HTMLIFrameElement indicates whether the browser <iframe> is currently muted.


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

var request = instanceOfHTMLIframeElement.getMuted();

and a Promise version:

instanceOfHTMLIframeElement.getMuted().then(function(muted) { ... });


  • Callback version: A DOMRequest that represents the get muted request. It has an onsuccess handler to handle the success case, and an onerror handler to handle the failure case. The muted value is available in the request.result property, and is a Boolean value — true means muted, and false means unmuted.
  • Promise version: A Promise that resolves with the muted value — a Boolean where true means muted, and false means unmuted.




Callback version:

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

var request = browser.getMuted();

request.onsuccess = function() {
  if(request.result) {
    console.log('The browser is muted.');
  } else {
    console.log('The browser is unmuted.');

Promise version:

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

browser.getMuted().then(function(muted) {
  if(muted) {
    console.log('The browser is muted.');
  } else {
    console.log('The browser is unmuted.');


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


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