diff --git a/content/base/src/Link.cpp b/content/base/src/Link.cpp
index 21f10cf3c1d..9506551441e 100644
--- a/content/base/src/Link.cpp
+++ b/content/base/src/Link.cpp
@@ -596,9 +596,10 @@ Link::SetSearchParams(URLSearchParams& aSearchParams)
 }
 
 void
-Link::URLSearchParamsUpdated()
+Link::URLSearchParamsUpdated(URLSearchParams* aSearchParams)
 {
   MOZ_ASSERT(mSearchParams);
+  MOZ_ASSERT(mSearchParams == aSearchParams);
 
   nsString search;
   mSearchParams->Serialize(search);
diff --git a/content/base/src/Link.h b/content/base/src/Link.h
index 9ade6e49527..ae004767292 100644
--- a/content/base/src/Link.h
+++ b/content/base/src/Link.h
@@ -115,7 +115,7 @@ public:
   bool ElementHasHref() const;
 
   // URLSearchParamsObserver
-  void URLSearchParamsUpdated() MOZ_OVERRIDE;
+  void URLSearchParamsUpdated(URLSearchParams* aSearchParams) MOZ_OVERRIDE;
 
 protected:
   virtual ~Link();
diff --git a/docshell/base/nsDocShell.cpp b/docshell/base/nsDocShell.cpp
index c49a33d927c..bca80b07ac2 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -192,6 +192,7 @@
 #include "nsIWidget.h"
 #include "mozilla/dom/EncodingUtils.h"
 #include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/URLSearchParams.h"
 
 static NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
 
@@ -1932,6 +1933,24 @@ nsDocShell::SetCurrentURI(nsIURI *aURI, nsIRequest *aRequest,
         mLSHE->GetIsSubFrame(&isSubFrame);
     }
 
+    // nsDocShell owns a URLSearchParams that is used by
+    // window.location.searchParams to be in sync with the current location.
+    if (!mURLSearchParams) {
+      mURLSearchParams = new URLSearchParams();
+    }
+
+    nsAutoCString search;
+
+    nsCOMPtr<nsIURL> url(do_QueryInterface(mCurrentURI));
+    if (url) {
+      nsresult rv = url->GetQuery(search);
+      if (NS_FAILED(rv)) {
+        NS_WARNING("Failed to get the query from a nsIURL.");
+      }
+    }
+
+    mURLSearchParams->ParseInput(search, nullptr);
+
     if (!isSubFrame && !isRoot) {
       /* 
        * We don't want to send OnLocationChange notifications when
@@ -5348,6 +5367,11 @@ nsDocShell::Destroy()
     mParentWidget = nullptr;
     mCurrentURI = nullptr;
 
+    if (mURLSearchParams) {
+      mURLSearchParams->RemoveObservers();
+      mURLSearchParams = nullptr;
+    }
+
     if (mScriptGlobal) {
         mScriptGlobal->DetachFromDocShell();
         mScriptGlobal = nullptr;
@@ -13187,3 +13211,9 @@ nsDocShell::GetOpenedRemote()
   nsCOMPtr<nsITabParent> openedRemote(do_QueryReferent(mOpenedRemote));
   return openedRemote;
 }
+
+URLSearchParams*
+nsDocShell::GetURLSearchParams()
+{
+  return mURLSearchParams;
+}
diff --git a/docshell/base/nsDocShell.h b/docshell/base/nsDocShell.h
index 9b697bff8a7..82b93bcfb7c 100644
--- a/docshell/base/nsDocShell.h
+++ b/docshell/base/nsDocShell.h
@@ -50,6 +50,7 @@
 namespace mozilla {
 namespace dom {
 class EventTarget;
+class URLSearchParams;
 }
 }
 
@@ -763,6 +764,9 @@ protected:
     nsCOMPtr<nsIChannel>       mFailedChannel;
     uint32_t                   mFailedLoadType;
 
+    // window.location.searchParams is updated in sync with this object.
+    nsRefPtr<mozilla::dom::URLSearchParams> mURLSearchParams;
+
     // Set in DoURILoad when either the LOAD_RELOAD_ALLOW_MIXED_CONTENT flag or
     // the LOAD_NORMAL_ALLOW_MIXED_CONTENT flag is set.
     // Checked in nsMixedContentBlocker, to see if the channels match.
diff --git a/docshell/base/nsIDocShell.idl b/docshell/base/nsIDocShell.idl
index f9daf4e7190..18efa0c96c0 100644
--- a/docshell/base/nsIDocShell.idl
+++ b/docshell/base/nsIDocShell.idl
@@ -11,6 +11,13 @@
 #include "js/TypeDecls.h"
 class nsPresContext;
 class nsIPresShell;
+
+namespace mozilla {
+namespace dom {
+class URLSearchParams;
+}
+}
+
 %}
 
 /**
@@ -19,6 +26,7 @@ class nsIPresShell;
 
 [ptr] native nsPresContext(nsPresContext);
 [ptr] native nsIPresShell(nsIPresShell);
+[ptr] native URLSearchParams(mozilla::dom::URLSearchParams);
 
 interface nsIURI;
 interface nsIChannel;
@@ -46,7 +54,7 @@ interface nsITabParent;
  
 typedef unsigned long nsLoadFlags;
 
-[scriptable, builtinclass, uuid(e5fe5c76-e511-4da3-9709-f8294b8dc5ce)]
+[scriptable, builtinclass, uuid(8ccc5a61-e053-4851-ab00-dadab0dffd7f)]
 interface nsIDocShell : nsIDocShellTreeItem
 {
   /**
@@ -982,4 +990,7 @@ interface nsIDocShell : nsIDocShellTreeItem
    */
   [noscript,notxpcom,nostdcall] void setOpenedRemote(in nsITabParent aOpenedRemote);
   [noscript,notxpcom,nostdcall] nsITabParent getOpenedRemote();
+
+  // URLSearchParams for the window.location is owned by the docShell.
+  [noscript,notxpcom] URLSearchParams getURLSearchParams();
 };
diff --git a/dom/base/URL.cpp b/dom/base/URL.cpp
index 80fe487d847..7a73c265e7e 100644
--- a/dom/base/URL.cpp
+++ b/dom/base/URL.cpp
@@ -341,9 +341,10 @@ URL::SetHost(const nsAString& aHost, ErrorResult& aRv)
 }
 
 void
-URL::URLSearchParamsUpdated()
+URL::URLSearchParamsUpdated(URLSearchParams* aSearchParams)
 {
   MOZ_ASSERT(mSearchParams);
+  MOZ_ASSERT(mSearchParams == aSearchParams);
 
   nsAutoString search;
   mSearchParams->Serialize(search);
diff --git a/dom/base/URL.h b/dom/base/URL.h
index 1ed7b85dcbc..23cfa85e0d8 100644
--- a/dom/base/URL.h
+++ b/dom/base/URL.h
@@ -121,7 +121,7 @@ public:
   }
 
   // URLSearchParamsObserver
-  void URLSearchParamsUpdated() MOZ_OVERRIDE;
+  void URLSearchParamsUpdated(URLSearchParams* aSearchParams) MOZ_OVERRIDE;
 
 private:
   nsIURI* GetURI() const
diff --git a/dom/base/URLSearchParams.cpp b/dom/base/URLSearchParams.cpp
index 7551a48747d..dc9d22e9e81 100644
--- a/dom/base/URLSearchParams.cpp
+++ b/dom/base/URLSearchParams.cpp
@@ -237,6 +237,12 @@ URLSearchParams::RemoveObserver(URLSearchParamsObserver* aObserver)
   mObservers.RemoveElement(aObserver);
 }
 
+void
+URLSearchParams::RemoveObservers()
+{
+  mObservers.Clear();
+}
+
 void
 URLSearchParams::Get(const nsAString& aName, nsString& aRetval)
 {
@@ -387,7 +393,7 @@ URLSearchParams::NotifyObservers(URLSearchParamsObserver* aExceptObserver)
 {
   for (uint32_t i = 0; i < mObservers.Length(); ++i) {
     if (mObservers[i] != aExceptObserver) {
-      mObservers[i]->URLSearchParamsUpdated();
+      mObservers[i]->URLSearchParamsUpdated(this);
     }
   }
 }
diff --git a/dom/base/URLSearchParams.h b/dom/base/URLSearchParams.h
index 1424d36aed3..e141f53ddd2 100644
--- a/dom/base/URLSearchParams.h
+++ b/dom/base/URLSearchParams.h
@@ -18,12 +18,14 @@
 namespace mozilla {
 namespace dom {
 
+class URLSearchParams;
+
 class URLSearchParamsObserver : public nsISupports
 {
 public:
   virtual ~URLSearchParamsObserver() {}
 
-  virtual void URLSearchParamsUpdated() = 0;
+  virtual void URLSearchParamsUpdated(URLSearchParams* aFromThis) = 0;
 };
 
 class URLSearchParams MOZ_FINAL : public nsISupports,
@@ -59,6 +61,7 @@ public:
 
   void AddObserver(URLSearchParamsObserver* aObserver);
   void RemoveObserver(URLSearchParamsObserver* aObserver);
+  void RemoveObservers();
 
   void Serialize(nsAString& aValue) const;
 
diff --git a/dom/base/nsLocation.cpp b/dom/base/nsLocation.cpp
index 7012d500176..d16e6c72080 100644
--- a/dom/base/nsLocation.cpp
+++ b/dom/base/nsLocation.cpp
@@ -68,16 +68,33 @@ nsLocation::nsLocation(nsPIDOMWindow* aWindow, nsIDocShell *aDocShell)
 
 nsLocation::~nsLocation()
 {
+  RemoveURLSearchParams();
 }
 
 // QueryInterface implementation for nsLocation
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsLocation)
   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
   NS_INTERFACE_MAP_ENTRY(nsIDOMLocation)
-  NS_INTERFACE_MAP_ENTRY(nsISupports)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMLocation)
 NS_INTERFACE_MAP_END
 
-NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsLocation, mInnerWindow)
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsLocation)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsLocation)
+  tmp->RemoveURLSearchParams();
+
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mInnerWindow);
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsLocation)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSearchParams)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInnerWindow)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(nsLocation)
+
 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsLocation)
 NS_IMPL_CYCLE_COLLECTING_RELEASE(nsLocation)
 
@@ -858,6 +875,17 @@ nsLocation::GetSearch(nsAString& aSearch)
 
 NS_IMETHODIMP
 nsLocation::SetSearch(const nsAString& aSearch)
+{
+  nsresult rv = SetSearchInternal(aSearch);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  return NS_OK;
+}
+
+nsresult
+nsLocation::SetSearchInternal(const nsAString& aSearch)
 {
   if (!CallerSubsumes())
     return NS_ERROR_DOM_SECURITY_ERR;
@@ -1036,3 +1064,119 @@ nsLocation::WrapObject(JSContext* aCx)
 {
   return LocationBinding::Wrap(aCx, this);
 }
+
+URLSearchParams*
+nsLocation::GetDocShellSearchParams()
+{
+  nsCOMPtr<nsIDocShell> docShell = GetDocShell();
+  if (!docShell) {
+    return nullptr;
+  }
+
+  return docShell->GetURLSearchParams();
+}
+
+URLSearchParams*
+nsLocation::SearchParams()
+{
+  if (!mSearchParams) {
+    // We must register this object to the URLSearchParams of the docshell in
+    // order to receive updates.
+    nsRefPtr<URLSearchParams> searchParams = GetDocShellSearchParams();
+    if (searchParams) {
+      searchParams->AddObserver(this);
+    }
+
+    mSearchParams = new URLSearchParams();
+    mSearchParams->AddObserver(this);
+    UpdateURLSearchParams();
+  }
+
+  return mSearchParams;
+}
+
+void
+nsLocation::SetSearchParams(URLSearchParams& aSearchParams)
+{
+  if (mSearchParams) {
+    mSearchParams->RemoveObserver(this);
+  }
+
+  // the observer will be cleared using the cycle collector.
+  mSearchParams = &aSearchParams;
+  mSearchParams->AddObserver(this);
+
+  nsAutoString search;
+  mSearchParams->Serialize(search);
+  SetSearchInternal(search);
+
+  // We don't need to inform the docShell about this new SearchParams because
+  // setting the new value the docShell will refresh its value automatically.
+}
+
+void
+nsLocation::URLSearchParamsUpdated(URLSearchParams* aSearchParams)
+{
+  MOZ_ASSERT(mSearchParams);
+
+  // This change comes from content.
+  if (aSearchParams == mSearchParams) {
+    nsAutoString search;
+    mSearchParams->Serialize(search);
+    SetSearchInternal(search);
+    return;
+  }
+
+  // This change comes from the docShell.
+#ifdef DEBUG
+  {
+    nsRefPtr<URLSearchParams> searchParams = GetDocShellSearchParams();
+    MOZ_ASSERT(searchParams);
+    MOZ_ASSERT(aSearchParams == searchParams);
+  }
+#endif
+
+  nsAutoString search;
+  aSearchParams->Serialize(search);
+  mSearchParams->ParseInput(NS_ConvertUTF16toUTF8(search), this);
+}
+
+void
+nsLocation::UpdateURLSearchParams()
+{
+  if (!mSearchParams) {
+    return;
+  }
+
+  nsAutoCString search;
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetURI(getter_AddRefs(uri));
+  if (NS_WARN_IF(NS_FAILED(rv)) || NS_WARN_IF(!uri)) {
+    return;
+  }
+
+  nsCOMPtr<nsIURL> url(do_QueryInterface(uri));
+  if (url) {
+    nsresult rv = url->GetQuery(search);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("Failed to get the query from a nsIURL.");
+    }
+  }
+
+  mSearchParams->ParseInput(search, this);
+}
+
+void
+nsLocation::RemoveURLSearchParams()
+{
+  if (mSearchParams) {
+    mSearchParams->RemoveObserver(this);
+    mSearchParams = nullptr;
+
+    nsRefPtr<URLSearchParams> docShellSearchParams = GetDocShellSearchParams();
+    if (docShellSearchParams) {
+      docShellSearchParams->RemoveObserver(this);
+    }
+  }
+}
diff --git a/dom/base/nsLocation.h b/dom/base/nsLocation.h
index f3fc3b4d73e..8bc58f6f354 100644
--- a/dom/base/nsLocation.h
+++ b/dom/base/nsLocation.h
@@ -14,6 +14,7 @@
 #include "nsCycleCollectionParticipant.h"
 #include "js/TypeDecls.h"
 #include "mozilla/ErrorResult.h"
+#include "mozilla/dom/URLSearchParams.h"
 #include "nsPIDOMWindow.h"
 
 class nsIURI;
@@ -26,6 +27,7 @@ class nsIDocShellLoadInfo;
 
 class nsLocation MOZ_FINAL : public nsIDOMLocation
                            , public nsWrapperCache
+                           , public mozilla::dom::URLSearchParamsObserver
 {
   typedef mozilla::ErrorResult ErrorResult;
 
@@ -33,7 +35,8 @@ public:
   nsLocation(nsPIDOMWindow* aWindow, nsIDocShell *aDocShell);
 
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
-  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsLocation)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsLocation,
+                                                         nsIDOMLocation)
 
   void SetDocShell(nsIDocShell *aDocShell);
   nsIDocShell *GetDocShell();
@@ -118,6 +121,11 @@ public:
   {
     aError = SetSearch(aSeach);
   }
+
+  mozilla::dom::URLSearchParams* SearchParams();
+
+  void SetSearchParams(mozilla::dom::URLSearchParams& aSearchParams);
+
   void GetHash(nsAString& aHash, ErrorResult& aError)
   {
     aError = GetHash(aHash);
@@ -136,9 +144,18 @@ public:
   }
   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
 
+  // URLSearchParamsObserver
+  void URLSearchParamsUpdated(mozilla::dom::URLSearchParams* aSearchParams) MOZ_OVERRIDE;
+
 protected:
   virtual ~nsLocation();
 
+  nsresult SetSearchInternal(const nsAString& aSearch);
+  void UpdateURLSearchParams();
+  void RemoveURLSearchParams();
+
+  mozilla::dom::URLSearchParams* GetDocShellSearchParams();
+
   // In the case of jar: uris, we sometimes want the place the jar was
   // fetched from as the URI instead of the jar: uri itself.  Pass in
   // true for aGetInnermostURI when that's the case.
@@ -156,6 +173,7 @@ protected:
 
   nsString mCachedHash;
   nsCOMPtr<nsPIDOMWindow> mInnerWindow;
+  nsRefPtr<mozilla::dom::URLSearchParams> mSearchParams;
   nsWeakPtr mDocShell;
 };
 
diff --git a/dom/base/test/mochitest.ini b/dom/base/test/mochitest.ini
index 598997096d0..c988349f39f 100644
--- a/dom/base/test/mochitest.ini
+++ b/dom/base/test/mochitest.ini
@@ -47,6 +47,7 @@ skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' || e1
 [test_history_state_null.html]
 [test_Image_constructor.html]
 [test_innersize_scrollport.html]
+[test_location_searchParams.html]
 [test_messageChannel.html]
 [test_messageChannel_cloning.html]
 [test_messageChannel_pingpong.html]
diff --git a/dom/base/test/test_location_searchParams.html b/dom/base/test/test_location_searchParams.html
new file mode 100644
index 00000000000..0e7a25d3f92
--- /dev/null
+++ b/dom/base/test/test_location_searchParams.html
@@ -0,0 +1,89 @@
+
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1037715
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1037715</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1037715">Mozilla Bug 1037715</a>
+  <iframe id="a"></iframe>
+  <script type="application/javascript">
+
+var l;
+
+var iframe = document.getElementById('a');
+function onload0() {
+  iframe.removeEventListener('load', onload0);
+
+  l = iframe.contentWindow.location;
+  is(l.searchParams.get('a'), 'test0', 'l.searchParams value is ok');
+
+  info('changing location from JS...');
+  iframe.addEventListener('load', onload1);
+  iframe.contentWindow.location.href = 'file_empty.html?a=test1';
+}
+
+function onload1() {
+  iframe.removeEventListener('load', onload1);
+
+  var ll = iframe.contentWindow.location;
+  is(ll.searchParams.get('a'), 'test1', 'location.searchParams value is ok');
+  is(l.searchParams.get('a'), 'test1', 'l.searchParams value is ok');
+  isnot(ll.searchParams, l.searchParams, '2 different objects.');
+
+  info('changing location using l.searchParams...');
+  iframe.addEventListener('load', onload2);
+  l.searchParams.set('a', 'test2');
+}
+
+function onload2() {
+  iframe.removeEventListener('load', onload2);
+
+  var ll = iframe.contentWindow.location;
+  is(ll.searchParams.get('a'), 'test2', 'location.searchParams value is ok');
+  is(l.searchParams.get('a'), 'test2', 'l.searchParams value is ok');
+  isnot(ll.searchParams, l.searchParams, '2 different objects.');
+
+  info('changing iframe.src...');
+  iframe.addEventListener('load', onload3);
+  l.search = 'a=test3';
+}
+
+function onload3() {
+  iframe.removeEventListener('load', onload3);
+
+  var ll = iframe.contentWindow.location;
+  is(ll.searchParams.get('a'), 'test3', 'location.searchParams value is ok');
+  is(l.searchParams.get('a'), 'test3', 'l.searchParams value is ok');
+  isnot(ll.searchParams, l.searchParams, '2 different objects.');
+
+  info('changing iframe.src...');
+  iframe.addEventListener('load', onload4);
+  iframe.src = 'file_empty.html?a=test4';
+}
+
+function onload4() {
+  iframe.removeEventListener('load', onload4);
+
+  var ll = iframe.contentWindow.location;
+  is(ll.searchParams.get('a'), 'test4', 'location.searchParams value is ok');
+  is(l.searchParams.get('a'), 'test4', 'l.searchParams value is ok');
+  isnot(ll.searchParams, l.searchParams, '2 different objects.');
+
+  SimpleTest.finish();
+}
+
+iframe.addEventListener('load', onload0);
+iframe.src = "file_empty.html?a=test0";
+SimpleTest.waitForExplicitFinish();
+
+  </script>
+
+</body>
+</html>
diff --git a/dom/webidl/Location.webidl b/dom/webidl/Location.webidl
index 7cc105890d0..59999602010 100644
--- a/dom/webidl/Location.webidl
+++ b/dom/webidl/Location.webidl
@@ -22,4 +22,4 @@ interface Location {
   void reload(optional boolean forceget = false);
 };
 // No support for .searchParams on Location yet.  See bug 1037715.
-Location implements URLUtilsNoSearchParams;
+Location implements URLUtils;
diff --git a/dom/webidl/URLUtils.webidl b/dom/webidl/URLUtils.webidl
index 05cb644e6c5..ad321622014 100644
--- a/dom/webidl/URLUtils.webidl
+++ b/dom/webidl/URLUtils.webidl
@@ -15,7 +15,7 @@
 
 [NoInterfaceObject,
  Exposed=(Window, Worker)]
-interface URLUtilsNoSearchParams {
+interface URLUtils {
   // Bug 824857: no support for stringifier attributes yet.
   //  stringifier attribute DOMString href;
   [Throws, CrossOriginWritable=Location]
@@ -39,7 +39,9 @@ interface URLUtilsNoSearchParams {
            attribute DOMString pathname;
   [Throws]
            attribute DOMString search;
-  // searchParams should go here once Location implements it.  See bug 1037715.
+
+           attribute URLSearchParams searchParams;
+
   [Throws]
            attribute DOMString hash;
 
@@ -47,10 +49,3 @@ interface URLUtilsNoSearchParams {
   [Throws]
   stringifier;
 };
-
-[NoInterfaceObject,
- Exposed=(Window, Worker)]
-interface URLUtils : URLUtilsNoSearchParams
-{
-           attribute URLSearchParams searchParams;
-};
diff --git a/dom/workers/URL.cpp b/dom/workers/URL.cpp
index 6c031315821..9a44abb0fc8 100644
--- a/dom/workers/URL.cpp
+++ b/dom/workers/URL.cpp
@@ -894,9 +894,10 @@ URL::RevokeObjectURL(const GlobalObject& aGlobal, const nsAString& aUrl)
 }
 
 void
-URL::URLSearchParamsUpdated()
+URL::URLSearchParamsUpdated(URLSearchParams* aSearchParams)
 {
   MOZ_ASSERT(mSearchParams);
+  MOZ_ASSERT(mSearchParams == aSearchParams);
 
   nsString search;
   mSearchParams->Serialize(search);
diff --git a/dom/workers/URL.h b/dom/workers/URL.h
index 50492b61b04..7a7c4755982 100644
--- a/dom/workers/URL.h
+++ b/dom/workers/URL.h
@@ -119,7 +119,7 @@ public:
   }
 
   // IURLSearchParamsObserver
-  void URLSearchParamsUpdated() MOZ_OVERRIDE;
+  void URLSearchParamsUpdated(URLSearchParams* aSearchParams) MOZ_OVERRIDE;
 
 private:
   URLProxy* GetURLProxy() const
diff --git a/toolkit/components/places/tests/cpp/mock_Link.h b/toolkit/components/places/tests/cpp/mock_Link.h
index 32d53a7ce09..7f049fbebd1 100644
--- a/toolkit/components/places/tests/cpp/mock_Link.h
+++ b/toolkit/components/places/tests/cpp/mock_Link.h
@@ -118,7 +118,7 @@ Link::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
 }
 
 void
-Link::URLSearchParamsUpdated()
+Link::URLSearchParamsUpdated(URLSearchParams* aSearchParams)
 {
   NS_NOTREACHED("Unexpected call to Link::URLSearchParamsUpdated");
 }