--- a/mobile/android/chrome/content/browser.js
+++ b/mobile/android/chrome/content/browser.js
@@ -467,22 +467,16 @@ var BrowserApp = {
 
         let isTelemetryEnabled = ParentalControls.isAllowed(ParentalControls.TELEMETRY);
         Services.prefs.setBoolPref("toolkit.telemetry.enabled", isTelemetryEnabled);
 
         let isHealthReportEnabled = ParentalControls.isAllowed(ParentalControls.HEALTH_REPORT);
         SharedPreferences.forApp().setBoolPref("android.not_a_preference.healthreport.uploadEnabled", isHealthReportEnabled);
     }
 
-    let sysInfo = Cc["@mozilla.org/system-info;1"].getService(Ci.nsIPropertyBag2);
-    if (sysInfo.get("version") < 16) {
-      let defaults = Services.prefs.getDefaultBranch(null);
-      defaults.setBoolPref("media.autoplay.enabled", false);
-    }
-
     InitLater(() => {
       // The order that context menu items are added is important
       // Make sure the "Open in App" context menu item appears at the bottom of the list
       this.initContextMenu();
       ExternalApps.init();
     }, NativeWindow, "contextmenus");
 
     if (AppConstants.ACCESSIBILITY) {