diff --git a/samples/js/apprtc/js/main.js b/samples/js/apprtc/js/main.js
index 192d01f78b..189d89d316 100644
--- a/samples/js/apprtc/js/main.js
+++ b/samples/js/apprtc/js/main.js
@@ -123,6 +123,10 @@
   }
 
   function createPeerConnection() {
+    // For FF, use Mozilla STUN server.
+    if (webrtcDetectedBrowser === "firefox") {
+      pc_config = {"iceServers":[{"url":"stun:stun.services.mozilla.com"}]};
+    }
     try {
       // Create an RTCPeerConnection via the polyfill (adapter.js).
       pc = new RTCPeerConnection(pcConfig, pcConstraints);