diff --git a/mozilla/dom/src/base/nsGlobalWindow.cpp b/mozilla/dom/src/base/nsGlobalWindow.cpp
index 9bd4c0333ac..ddd08e2ca2f 100644
--- a/mozilla/dom/src/base/nsGlobalWindow.cpp
+++ b/mozilla/dom/src/base/nsGlobalWindow.cpp
@@ -2063,13 +2063,6 @@ GlobalWindowImpl::Focus()
   nsCOMPtr<nsIBaseWindow> treeOwnerAsWin;
   GetTreeOwner(getter_AddRefs(treeOwnerAsWin));
   if (treeOwnerAsWin) {
-    PRBool isEnabled = PR_TRUE;
-    treeOwnerAsWin->GetEnabled(&isEnabled);
-    if (!isEnabled) {
-      NS_WARNING( "Should not try to set the focus on a disabled window" );
-      return NS_ERROR_FAILURE;
-    }
-
     treeOwnerAsWin->SetVisibility(PR_TRUE);
     nsCOMPtr<nsIEmbeddingSiteWindow> embeddingWin(do_GetInterface(treeOwnerAsWin));
     if (embeddingWin)
@@ -3420,16 +3413,8 @@ GlobalWindowImpl::Activate()
  */
   nsCOMPtr<nsIBaseWindow> treeOwnerAsWin;
   GetTreeOwner(getter_AddRefs(treeOwnerAsWin));
-  if (treeOwnerAsWin) {
-    PRBool isEnabled = PR_TRUE;
-    treeOwnerAsWin->GetEnabled(&isEnabled);
-    if (!isEnabled) {
-      NS_WARNING( "Should not try to activate a disabled window" );
-      return NS_ERROR_FAILURE;
-    }
-
+  if (treeOwnerAsWin)
     treeOwnerAsWin->SetVisibility(PR_TRUE);
-  }
 
   nsCOMPtr<nsIPresShell> presShell;
   mDocShell->GetPresShell(getter_AddRefs(presShell));