--- a/mobile/android/chrome/content/CastingApps.js
+++ b/mobile/android/chrome/content/CastingApps.js
@@ -133,18 +133,20 @@ var CastingApps = {
     // Register targets
     SimpleServiceDiscovery.registerDevice(rokuDevice);
 
     // MediaPlayerDevice will notify us any time the native device list changes.
     mediaPlayerDevice.init();
     SimpleServiceDiscovery.registerDevice(mediaPlayerDevice);
 
     // Presentation Device will notify us any time the available device list changes.
-    fxOSTVDevice.init();
-    SimpleServiceDiscovery.registerDevice(fxOSTVDevice);
+    if (window.PresentationRequest) {
+      fxOSTVDevice.init();
+      SimpleServiceDiscovery.registerDevice(fxOSTVDevice);
+    }
 
     // Search for devices continuously
     SimpleServiceDiscovery.search(this._interval);
 
     this._castMenuId = NativeWindow.contextmenus.add(
       Strings.browser.GetStringFromName("contextmenu.sendToDevice"),
       this.filterCast,
       this.handleContextMenu.bind(this)