diff --git a/demos/gum.html b/demos/gum.html
index ce1594e..c0feca2 100644
--- a/demos/gum.html
+++ b/demos/gum.html
@@ -31,7 +31,7 @@
     gum = document.getElementById('gum');
 
 function init() {
-  navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia;
+  navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
   if (navigator.getUserMedia) {
     // NOTE: at time of writing March 26, 2012, audio isn't working in Chrome
     navigator.getUserMedia('video', successCallback, errorCallback);
@@ -52,7 +52,7 @@
   }
 }
 
-if (navigator.getUserMedia || navigator.webkitGetUserMedia) {
+if (navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia) {
   article.removeChild(gum);
   article.className = 'supported';
   init();