diff --git a/extensions/browser/guest_view/mime_handler_view/mime_handler_view_embedder.cc b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_embedder.cc
index 22ef239cb00f71..c000d00b8a9cf4 100644
--- a/extensions/browser/guest_view/mime_handler_view/mime_handler_view_embedder.cc
+++ b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_embedder.cc
@@ -186,7 +186,8 @@ void MimeHandlerViewEmbedder::DidCreateMimeHandlerViewGuest(
   // Full page plugin refers to <iframe> or main frame navigations to a
   // MimeHandlerView resource. In such cases MHVG does not have a frame
   // container.
-  bool is_full_page = !guest_view->maybe_has_frame_container();
+  bool is_full_page = !guest_view->maybe_has_frame_container() &&
+                      !guest_view->GetEmbedderFrame()->GetParent();
   MimeHandlerViewAttachHelper::Get(embedder_frame_process_id)
       ->AttachToOuterWebContents(guest_view, embedder_frame_process_id,
                                  outer_contents_rfh, element_instance_id_,