diff --git a/dom/events/UIEvent.cpp b/dom/events/UIEvent.cpp
index cabab0ce38ab..eddebaf61673 100644
--- a/dom/events/UIEvent.cpp
+++ b/dom/events/UIEvent.cpp
@@ -144,13 +144,6 @@ UIEvent::GetView(mozIDOMWindowProxy** aView)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-UIEvent::GetDetail(int32_t* aDetail)
-{
-  *aDetail = mDetail;
-  return NS_OK;
-}
-
 void
 UIEvent::InitUIEvent(const nsAString& typeArg,
                      bool canBubbleArg,
@@ -369,9 +362,7 @@ UIEvent::Serialize(IPC::Message* aMsg, bool aSerializeInterfaceType)
 
   Event::Serialize(aMsg, false);
 
-  int32_t detail = 0;
-  GetDetail(&detail);
-  IPC::WriteParam(aMsg, detail);
+  IPC::WriteParam(aMsg, Detail());
 }
 
 NS_IMETHODIMP_(bool)
diff --git a/dom/interfaces/events/nsIDOMUIEvent.idl b/dom/interfaces/events/nsIDOMUIEvent.idl
index 3912765ea7dd..733c40df0c35 100644
--- a/dom/interfaces/events/nsIDOMUIEvent.idl
+++ b/dom/interfaces/events/nsIDOMUIEvent.idl
@@ -31,7 +31,6 @@ class Event;
 interface nsIDOMUIEvent : nsISupports
 {
   readonly attribute mozIDOMWindowProxy view;
-  readonly attribute long               detail;
   void                      initUIEvent(in DOMString typeArg,
                                         in boolean canBubbleArg,
                                         in boolean cancelableArg,
diff --git a/editor/libeditor/HTMLEditorEventListener.cpp b/editor/libeditor/HTMLEditorEventListener.cpp
index e3121118c2fc..86f05220b806 100644
--- a/editor/libeditor/HTMLEditorEventListener.cpp
+++ b/editor/libeditor/HTMLEditorEventListener.cpp
@@ -99,9 +99,7 @@ HTMLEditorEventListener::MouseDown(MouseEvent* aMouseEvent)
 
   bool isContextClick = buttonNumber == 2;
 
-  int32_t clickCount;
-  nsresult rv = aMouseEvent->GetDetail(&clickCount);
-  NS_ENSURE_SUCCESS(rv, rv);
+  int32_t clickCount = aMouseEvent->Detail();
 
   nsCOMPtr<nsIDOMEventTarget> target = aMouseEvent->GetExplicitOriginalTarget();
   NS_ENSURE_TRUE(target, NS_ERROR_NULL_POINTER);
@@ -148,7 +146,7 @@ HTMLEditorEventListener::MouseDown(MouseEvent* aMouseEvent)
         } else {
           // Get enclosing link if in text so we can select the link
           nsCOMPtr<nsIDOMElement> linkElement;
-          rv = htmlEditor->GetElementOrParentByTagName(
+          nsresult rv = htmlEditor->GetElementOrParentByTagName(
                              NS_LITERAL_STRING("href"), node,
                              getter_AddRefs(linkElement));
           NS_ENSURE_SUCCESS(rv, rv);