diff --git a/editor/libeditor/HTMLEditUtils.cpp b/editor/libeditor/HTMLEditUtils.cpp
index bf46ac7e5086..516e62abad41 100644
--- a/editor/libeditor/HTMLEditUtils.cpp
+++ b/editor/libeditor/HTMLEditUtils.cpp
@@ -202,12 +202,6 @@ HTMLEditUtils::IsTableElementButNotTable(nsINode* aNode)
 /**
  * IsTable() returns true if aNode is an html table.
  */
-bool
-HTMLEditUtils::IsTable(nsIDOMNode* aNode)
-{
-  return EditorBase::NodeIsType(aNode, nsGkAtoms::table);
-}
-
 bool
 HTMLEditUtils::IsTable(nsINode* aNode)
 {
@@ -354,13 +348,6 @@ HTMLEditUtils::IsLink(nsINode* aNode)
   return !tmpText.IsEmpty();
 }
 
-bool
-HTMLEditUtils::IsNamedAnchor(nsIDOMNode *aNode)
-{
-  nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
-  return node && IsNamedAnchor(node);
-}
-
 bool
 HTMLEditUtils::IsNamedAnchor(nsINode* aNode)
 {
diff --git a/editor/libeditor/HTMLEditUtils.h b/editor/libeditor/HTMLEditUtils.h
index e4b770ccd583..a9538a9cad45 100644
--- a/editor/libeditor/HTMLEditUtils.h
+++ b/editor/libeditor/HTMLEditUtils.h
@@ -26,7 +26,6 @@ public:
   static bool IsParagraph(nsIDOMNode* aNode);
   static bool IsListItem(nsINode* aNode);
   static bool IsListItem(nsIDOMNode* aNode);
-  static bool IsTable(nsIDOMNode* aNode);
   static bool IsTable(nsINode* aNode);
   static bool IsTableRow(nsIDOMNode* aNode);
   static bool IsTableRow(nsINode* aNode);
@@ -49,7 +48,6 @@ public:
   static bool IsImage(nsIDOMNode* aNode);
   static bool IsLink(nsINode* aNode);
   static bool IsNamedAnchor(nsINode* aNode);
-  static bool IsNamedAnchor(nsIDOMNode* aNode);
   static bool IsDiv(nsIDOMNode* aNode);
   static bool IsMozDiv(nsINode* aNode);
   static bool IsMozDiv(nsIDOMNode* aNode);
diff --git a/editor/libeditor/HTMLEditor.cpp b/editor/libeditor/HTMLEditor.cpp
index 90286c037462..23bbb91815f5 100644
--- a/editor/libeditor/HTMLEditor.cpp
+++ b/editor/libeditor/HTMLEditor.cpp
@@ -1430,8 +1430,6 @@ HTMLEditor::InsertElementAtSelection(nsIDOMElement* aElement,
   nsCOMPtr<Element> element = do_QueryInterface(aElement);
   NS_ENSURE_TRUE(element, NS_ERROR_NULL_POINTER);
 
-  nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aElement);
-
   CommitComposition();
   AutoPlaceholderBatch beginBatching(this);
   AutoRules beginRulesSniffing(this, EditAction::insertElement,
@@ -1471,7 +1469,7 @@ HTMLEditor::InsertElementAtSelection(nsIDOMElement* aElement,
       // Named Anchor is a special case,
       // We collapse to insert element BEFORE the selection
       // For all other tags, we insert AFTER the selection
-      if (HTMLEditUtils::IsNamedAnchor(node)) {
+      if (HTMLEditUtils::IsNamedAnchor(element)) {
         selection->CollapseToStart();
       } else {
         selection->CollapseToEnd();
@@ -1501,7 +1499,7 @@ HTMLEditor::InsertElementAtSelection(nsIDOMElement* aElement,
       }
       // check for inserting a whole table at the end of a block. If so insert
       // a br after it.
-      if (HTMLEditUtils::IsTable(node) &&
+      if (HTMLEditUtils::IsTable(element) &&
           IsLastEditableChild(element)) {
         DebugOnly<bool> advanced = insertedPoint.AdvanceOffset();
         NS_WARNING_ASSERTION(advanced,