--- a/testing/marionette/listener.js
+++ b/testing/marionette/listener.js
@@ -25,16 +25,18 @@ Cu.import("chrome://marionette/content/i
 Cu.import("chrome://marionette/content/logging.js");
 Cu.import("chrome://marionette/content/proxy.js");
 Cu.import("chrome://marionette/content/simpletest.js");
 
 Cu.import("resource://gre/modules/FileUtils.jsm");
 Cu.import("resource://gre/modules/Task.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 
+Cu.importGlobalProperties(["URL"]);
+
 var contentLog = new logging.ContentLogger();
 
 var isB2G = false;
 
 var marionetteTestName;
 var winUtil = content.QueryInterface(Ci.nsIInterfaceRequestor)
     .getInterface(Ci.nsIDOMWindowUtils);
 var listenerId = null; // unique ID of this listener
@@ -922,44 +924,50 @@ function pollForReadyState(msg, start, c
 /**
  * Navigate to the given URL.  The operation will be performed on the
  * current browsing context, which means it handles the case where we
  * navigate within an iframe.  All other navigation is handled by the
  * driver (in chrome space).
  */
 function get(msg) {
   let start = new Date().getTime();
+  let requestedURL = new URL(msg.json.url).toString();
 
   // Prevent DOMContentLoaded events from frames from invoking this
   // code, unless the event is coming from the frame associated with
   // the current window (i.e. someone has used switch_to_frame).
   onDOMContentLoaded = function onDOMContentLoaded(event) {
-    if (!event.originalTarget.defaultView.frameElement ||
-        event.originalTarget.defaultView.frameElement == curContainer.frame.frameElement) {
+    let correctFrame =
+      !event.originalTarget.defaultView.frameElement ||
+      event.originalTarget.defaultView.frameElement == curContainer.frame.frameElement;
+
+    let correctURL = curContainer.frame.location == requestedURL;
+
+    if (correctFrame && correctURL) {
       pollForReadyState(msg, start, () => {
         removeEventListener("DOMContentLoaded", onDOMContentLoaded, false);
       });
     }
   };
 
   function timerFunc() {
     removeEventListener("DOMContentLoaded", onDOMContentLoaded, false);
     sendError(new TimeoutError("Error loading page, timed out (onDOMContentLoaded)"), msg.json.command_id);
   }
   if (msg.json.pageTimeout != null) {
     navTimer.initWithCallback(timerFunc, msg.json.pageTimeout, Ci.nsITimer.TYPE_ONE_SHOT);
   }
   addEventListener("DOMContentLoaded", onDOMContentLoaded, false);
   if (isB2G) {
-    curContainer.frame.location = msg.json.url;
+    curContainer.frame.location = requestedURL;
   } else {
     // We need to move to the top frame before navigating
     sendSyncMessage("Marionette:switchedToFrame", { frameValue: null });
     curContainer.frame = content;
-    curContainer.frame.location = msg.json.url;
+    curContainer.frame.location = requestedURL;
   }
 }
 
  /**
  * Cancel the polling and remove the event listener associated with a current
  * navigation request in case we're interupted by an onbeforeunload handler
  * and navigation doesn't complete.
  */