--- a/mobile/chrome/content/browser.js
+++ b/mobile/chrome/content/browser.js
@@ -1571,21 +1571,21 @@ const ContentTouchHandler = {
 function ContentCustomKeySender(container) {
   container.addEventListener("keypress", this, false);
   container.addEventListener("keyup", this, false);
   container.addEventListener("keydown", this, false);
 }
 
 ContentCustomKeySender.prototype = {
   handleEvent: function handleEvent(aEvent) {
-    aEvent.stopPropagation();
-    aEvent.preventDefault();
-
     let browser = getBrowser();
-    if (browser) {
+    if (browser && browser.getAttribute("remote") == "true") {
+      aEvent.stopPropagation();
+      aEvent.preventDefault();
+
       browser.messageManager.sendAsyncMessage("Browser:KeyEvent", {
         type: aEvent.type,
         keyCode: aEvent.keyCode,
         charCode: (aEvent.type != "keydown") ? aEvent.charCode : null,
         modifiers: this._parseModifiers(aEvent)
       });
     }
   },