--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -478,18 +478,16 @@ TabChild::RecvloadURL(const nsCString& u
 
     nsresult rv = mWebNav->LoadURI(NS_ConvertUTF8toUTF16(uri).get(),
                                    nsIWebNavigation::LOAD_FLAGS_NONE,
                                    NULL, NULL, NULL);
     if (NS_FAILED(rv)) {
         NS_WARNING("mWebNav->LoadURI failed. Eating exception, what else can I do?");
     }
 
-    SendPContextWrapperConstructor()->SendPObjectWrapperConstructor(true);
-
     return true;
 }
 
 bool
 TabChild::Recvmove(const PRUint32& x,
                      const PRUint32& y,
                      const PRUint32& width,
                      const PRUint32& height)
@@ -538,38 +536,20 @@ TabChild::RecvsendKeyEvent(const nsStrin
   nsCOMPtr<nsIDOMWindowUtils> utils = do_GetInterface(window);
   NS_ENSURE_TRUE(utils, true);
   PRBool ignored = PR_FALSE;
   utils->SendKeyEvent(aType, aKeyCode, aCharCode,
                       aModifiers, aPreventDefault, &ignored);
   return true;
 }
 
-static JSContext*
-GetJSContextFrom(nsIWebNavigation* webNav)
-{
-    nsCOMPtr<nsIDOMDocument> domDocument;
-    nsCOMPtr<nsIDocument> document;
-    nsCOMPtr<nsIScriptGlobalObject> global;
-    nsCOMPtr<nsIScriptContext> context;
-
-    if (NS_SUCCEEDED(webNav->GetDocument(getter_AddRefs(domDocument))) &&
-        (document = do_QueryInterface(domDocument)) &&
-        (global = do_QueryInterface(document->GetScriptGlobalObject())) &&
-        (context = do_QueryInterface(global->GetContext()))) {
-        return static_cast<JSContext*>(context->GetNativeContext());
-    }
-
-    return NULL;
-}
-
 PContextWrapperChild*
 TabChild::AllocPContextWrapper()
 {
-    return new ContextWrapperChild(GetJSContextFrom(mWebNav));
+    return new ContextWrapperChild(mCx);
 }
 
 bool
 TabChild::DeallocPContextWrapper(PContextWrapperChild* actor)
 {
     delete actor;
     return true;
 }
@@ -850,17 +830,22 @@ TabChild::InitTabChildGlobal()
   JSObject* global = nsnull;
   rv = mRootGlobal->GetJSObject(&global);
   NS_ENSURE_SUCCESS(rv, false);
 
   JS_SetGlobalObject(cx, global);
 
   mContextWrapper = new ContextWrapperChild(mCx);
   SendPContextWrapperConstructor(mContextWrapper);
-  
+
+  jsval cval;
+  if (JS_GetProperty(cx, global, "content", &cval) &&
+      JSVAL_IS_OBJECT(cval))
+      mContextWrapper->GetOrCreateWrapper(JSVAL_TO_OBJECT(cval),
+                                          true); // make global
   return true;
 }
 
 nsresult
 TabChild::GetObjectsForMessage(nsTArray<mozilla::jsipc::PObjectWrapperChild*>& aObjects)
 {
   nsAXPCNativeCallContext* ncc = nsnull;
   nsresult rv = nsContentUtils::XPConnect()->GetCurrentNativeCallContext(&ncc);

--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -432,38 +432,27 @@ TabParent::AllocPContextWrapper()
 
 bool
 TabParent::DeallocPContextWrapper(PContextWrapperParent* actor)
 {
     delete actor;
     return true;
 }
 
-bool
+JSBool
 TabParent::GetGlobalJSObject(JSContext* cx, JSObject** globalp)
 {
     // TODO Unify this code with TestShellParent::GetGlobalJSObject.
     nsTArray<PContextWrapperParent*> cwps(1);
     ManagedPContextWrapperParent(cwps);
     if (cwps.Length() < 1)
-        return false;
-
-    // This is temporary until we decide whether to return
-    // TabChildGlobal or top level page's global object.
-    // Currently this returns the page global object.
-    // Note, TabChildGlobal's context doesn't report its global object here!
-    NS_ASSERTION(cwps.Length() <= 2, "More than two PContextWrappers?");
+        return JS_FALSE;
+    NS_ASSERTION(cwps.Length() == 1, "More than one PContextWrapper?");
     ContextWrapperParent* cwp = static_cast<ContextWrapperParent*>(cwps[0]);
-    if (cwp->GetGlobalObjectWrapper()) {
-      return cwp->GetGlobalJSObject(cx, globalp);
-    } else if (cwps.Length() == 2) {
-      cwp = static_cast<ContextWrapperParent*>(cwps[1]);
-      return cwp->GetGlobalJSObject(cx, globalp);
-    }
-    return false;
+    return cwp->GetGlobalJSObject(cx, globalp);
 }
 
 void
 TabParent::SendMouseEvent(const nsAString& aType, float aX, float aY,
                           PRInt32 aButton, PRInt32 aClickCount,
                           PRInt32 aModifiers, PRBool aIgnoreRootScrollFrame)
 {
   SendsendMouseEvent(nsString(aType), aX, aY, aButton, aClickCount,

--- a/dom/ipc/TabParent.h
+++ b/dom/ipc/TabParent.h
@@ -38,16 +38,17 @@
 
 #ifndef mozilla_tabs_TabParent_h
 #define mozilla_tabs_TabParent_h
 
 #include "mozilla/dom/PIFrameEmbeddingParent.h"
 
 #include "mozilla/ipc/GeckoChildProcessHost.h"
 
+#include "jsapi.h"
 #include "nsCOMPtr.h"
 #include "nsIBrowserDOMWindow.h"
 #include "nsIWebProgress.h"
 #include "nsIWebProgressListener.h"
 #include "nsWeakReference.h"
 
 class nsIURI;
 class nsIDOMElement;
@@ -154,17 +155,17 @@ public:
             const PRInt32& bufw,
             const PRInt32& bufh,
             Shmem& buf);
     virtual bool DeallocPDocumentRendererShmem(PDocumentRendererShmemParent* actor);
 
     virtual PContextWrapperParent* AllocPContextWrapper();
     virtual bool DeallocPContextWrapper(PContextWrapperParent* actor);
 
-    bool GetGlobalJSObject(JSContext* cx, JSObject** globalp);
+    JSBool GetGlobalJSObject(JSContext* cx, JSObject** globalp);
 
     NS_DECL_ISUPPORTS
     NS_DECL_NSIWEBPROGRESS
 
 protected:
     bool ReceiveMessage(const nsString& aMessage,
                         PRBool aSync,
                         const nsString& aJSON,

--- a/ipc/testshell/TestShellParent.cpp
+++ b/ipc/testshell/TestShellParent.cpp
@@ -81,27 +81,27 @@ TestShellParent::AllocPContextWrapper()
 
 bool
 TestShellParent::DeallocPContextWrapper(PContextWrapperParent* actor)
 {
     delete actor;
     return true;
 }
 
-bool
+JSBool
 TestShellParent::GetGlobalJSObject(JSContext* cx, JSObject** globalp)
 {
     // TODO Unify this code with TabParent::GetGlobalJSObject.
     nsTArray<PContextWrapperParent*> cwps(1);
     ManagedPContextWrapperParent(cwps);
     if (cwps.Length() < 1)
-        return false;
+        return JS_FALSE;
     NS_ASSERTION(cwps.Length() == 1, "More than one PContextWrapper?");
     ContextWrapperParent* cwp = static_cast<ContextWrapperParent*>(cwps[0]);
-    return (cwp->GetGlobalJSObject(cx, globalp));
+    return cwp->GetGlobalJSObject(cx, globalp);
 }
 
 JSBool
 TestShellCommandParent::SetCallback(JSContext* aCx,
                                     jsval aCallback)
 {
   if (!mCallback.Hold(aCx)) {
     return JS_FALSE;

--- a/ipc/testshell/TestShellParent.h
+++ b/ipc/testshell/TestShellParent.h
@@ -70,17 +70,17 @@ public:
   DeallocPTestShellCommand(PTestShellCommandParent* aActor);
 
   bool
   CommandDone(TestShellCommandParent* aActor, const nsString& aResponse);
 
   PContextWrapperParent* AllocPContextWrapper();
   bool DeallocPContextWrapper(PContextWrapperParent* actor);
 
-  bool GetGlobalJSObject(JSContext* cx, JSObject** globalp);
+  JSBool GetGlobalJSObject(JSContext* cx, JSObject** globalp);
 };
 
 
 class TestShellCommandParent : public PTestShellCommandParent
 {
 public:
   TestShellCommandParent() : mCx(NULL) { }
 

--- a/js/src/ipc/ContextWrapperParent.h
+++ b/js/src/ipc/ContextWrapperParent.h
@@ -60,22 +60,22 @@ class ContextWrapperParent
 {
 public:
 
     ContextWrapperParent(ContentProcessParent* cpp)
         : mContentProcess(cpp)
         , mGlobal(NULL)
     {}
 
-    bool GetGlobalJSObject(JSContext* cx, JSObject** globalp) {
+    JSBool GetGlobalJSObject(JSContext* cx, JSObject** globalp) {
         if (!mGlobal)
-            return false;
+            return JS_FALSE;
         mGlobalHolder.Hold(cx);
         mGlobalHolder = *globalp = mGlobal->GetJSObject(cx);
-        return true;
+        return JS_TRUE;
     }
 
     ObjectWrapperParent* GetGlobalObjectWrapper() const {
         return mGlobal;
     }
 
     bool RequestRunToCompletion() {
         return mContentProcess->RequestRunToCompletion();