diff --git a/src/common/init.js b/src/common/init.js
index 4f4882c91..758544eb9 100644
--- a/src/common/init.js
+++ b/src/common/init.js
@@ -55,6 +55,16 @@ function replaceNavigator(origNavigator) {
         for (var key in origNavigator) {
             if (typeof origNavigator[key] == 'function') {
                 newNavigator[key] = origNavigator[key].bind(origNavigator);
+            } else {
+                (function(k) {
+                        Object.defineProperty(newNavigator, k, {
+                            get: function() {
+                                return origNavigator[k];
+                            },
+                            configurable: true,
+                            enumerable: true
+                        });
+                    })(key);
             }
         }
     }
diff --git a/src/common/init_b.js b/src/common/init_b.js
index 32c206819..f00409b87 100644
--- a/src/common/init_b.js
+++ b/src/common/init_b.js
@@ -56,6 +56,16 @@ function replaceNavigator(origNavigator) {
         for (var key in origNavigator) {
             if (typeof origNavigator[key] == 'function') {
                 newNavigator[key] = origNavigator[key].bind(origNavigator);
+            } else {
+                (function(k) {
+                        Object.defineProperty(newNavigator, k, {
+                            get: function() {
+                                return origNavigator[k];
+                            },
+                            configurable: true,
+                            enumerable: true
+                        });
+                    })(key);
             }
         }
     }