Learn how to access the media.navigator.enabled value of Firefox using Javascript

Lately, I've been working on a demo that utilizes getUserMedia() in Javascript to access the webcam of devices and display the video stream on an HTML5 canvas. In cases where browsers do not support getUserMedia(), I have implemented a fallback to a Flash version of the demo.

Everything functions smoothly in Chrome and Opera, but there's a slight hiccup with Firefox 18. The issue lies in the default setting of media.navigator.enabled being set to false in the config file for Firefox. This essentially prevents the user from enabling the camera, leading to a standstill in my script as it waits for permission that never arrives.

Unfortunately, I cannot alter or override this preference in the config file, nor would I want to. Is there any way to retrieve the value of this flag so that I can implement a pre-check before proceeding, possibly using a condition like "if(media.navigator.enabled)..."?

If no solution is found, I may have to resort to always utilizing Flash for Firefox, which would be somewhat disappointing.

You can check out the demo here.

javascriptfirefoxconfigwebrtcgetusermedia

Answer №1

The setting for media.navigator.enabled is not meant to be toggled by users. Currently, it is set to false in Firefox 18 because the feature is still in testing phase and not fully developed. The exciting update is that this feature will be automatically enabled in Firefox 20. The anticipated release date for Firefox 20 is March 2nd, so shortly after that, you can expect widespread support for this functionality in Firefox (as most users tend to update to the latest versions).

However, dealing with older versions of Firefox might pose a challenge. While they do have the navigator.mozGetUserMedia() method, it may not function as expected. You have a choice between setting a timeout or using user agent sniffing for handling these cases:

var match = /\brv:([\d\.]+)/.exec(navigator.userAgent);
if (match && parseFloat(match[1]) < 20)
  alert("getUserMedia() not supported");

It's important to note that the code snippet above specifically targets the Gecko version, not just Firefox, as there are other browsers based on Gecko besides Firefox.

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