--- a/dom/html/nsGenericHTMLElement.cpp
+++ b/dom/html/nsGenericHTMLElement.cpp
@@ -2429,21 +2429,18 @@ void nsGenericHTMLFormElement::UpdateDis
     disabledStates |= NS_EVENT_STATE_ENABLED;
   }
 
   EventStates oldDisabledStates = State() & DISABLED_STATES;
   EventStates changedStates = disabledStates ^ oldDisabledStates;
 
   if (!changedStates.IsEmpty()) {
     if (aNotify) {
-      nsFocusManager *fm = nsFocusManager::GetFocusManager();
-
-      if (fm && fm->IsFocused(this)) {
-        fm->ClearFocus(OwnerDoc()->GetWindow());
-      }
+      mozilla::ErrorResult errResult;
+      this->Blur(errResult);
     }
 
     ToggleStates(changedStates, aNotify);
   }
 }
 
 void
 nsGenericHTMLFormElement::UpdateRequiredState(bool aIsRequired, bool aNotify)