--- a/mobile/android/base/java/org/mozilla/gecko/menu/GeckoMenu.java
+++ b/mobile/android/base/java/org/mozilla/gecko/menu/GeckoMenu.java
@@ -457,16 +457,27 @@ public class GeckoMenu extends ListView
                 !mQuickShareActionItems.containsKey(menuItem))
                 return true;
         }
 
         return false;
     }
 
     @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        // Close the menu if it is open and the hardware menu key is pressed.
+        if (keyCode == KeyEvent.KEYCODE_MENU && isShown()) {
+            close();
+            return true;
+        }
+
+        return super.onKeyDown(keyCode, event);
+    }
+
+    @Override
     public boolean isShortcutKey(int keyCode, KeyEvent event) {
         return true;
     }
 
     @Override
     public boolean performIdentifierAction(int id, int flags) {
         return false;
     }