--- a/layout/base/nsPresContext.cpp
+++ b/layout/base/nsPresContext.cpp
@@ -1147,21 +1147,31 @@ nsPresContext::Observe(nsISupports* aSub
   return NS_ERROR_FAILURE;
 }
 
 nsPresContext*
 nsPresContext::GetParentPresContext()
 {
   nsIPresShell* shell = GetPresShell();
   if (shell) {
-    nsIFrame* rootFrame = shell->FrameManager()->GetRootFrame();
-    if (rootFrame) {
-      nsIFrame* f = nsLayoutUtils::GetCrossDocParentFrame(rootFrame);
-      if (f)
-        return f->PresContext();
+    nsViewManager* viewManager = shell->GetViewManager();
+    if (viewManager) {
+      nsView* view = viewManager->GetRootView();
+      if (view) {
+        view = view->GetParent(); // anonymous inner view
+        if (view) {
+          view = view->GetParent(); // subdocumentframe's view
+          if (view) {
+            nsIFrame* f = view->GetFrame();
+            if (f) {
+              return f->PresContext();
+            }
+          }
+        }
+      }
     }
   }
   return nullptr;
 }
 
 nsPresContext*
 nsPresContext::GetToplevelContentDocumentPresContext()
 {