--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -5911,25 +5911,18 @@ nsGlobalWindow::RefreshCompartmentPrinci
 
   JS_SetCompartmentPrincipals(js::GetObjectCompartment(GetWrapperPreserveColor()),
                               nsJSPrincipals::get(mDoc->NodePrincipal()));
 }
 
 static already_AddRefed<nsIDocShellTreeItem>
 GetCallerDocShellTreeItem()
 {
-  JSContext *cx = nsContentUtils::GetCurrentJSContext();
-  nsCOMPtr<nsIDocShellTreeItem> callerItem;
-
-  if (cx) {
-    nsCOMPtr<nsIWebNavigation> callerWebNav =
-      do_GetInterface(nsJSUtils::GetDynamicScriptGlobal(cx));
-
-    callerItem = do_QueryInterface(callerWebNav);
-  }
+  nsCOMPtr<nsIWebNavigation> callerWebNav = do_GetInterface(GetEntryGlobal());
+  nsCOMPtr<nsIDocShellTreeItem> callerItem = do_QueryInterface(callerWebNav);
 
   return callerItem.forget();
 }
 
 bool
 nsGlobalWindow::WindowExists(const nsAString& aName,
                              bool aLookForCallerOnJSStack)
 {