diff --git a/editor/libeditor/nsHTMLEditRules.cpp b/editor/libeditor/nsHTMLEditRules.cpp
index d14a87190c65..0e5691d84eca 100644
--- a/editor/libeditor/nsHTMLEditRules.cpp
+++ b/editor/libeditor/nsHTMLEditRules.cpp
@@ -3019,7 +3019,7 @@ nsHTMLEditRules::WillMakeList(Selection* aSelection,
   for (auto& curNode : arrayOfNodes) {
     // if curNode is not a Break or empty inline, we're done
     if (!nsTextEditUtils::IsBreak(curNode) &&
-        !IsEmptyInline(GetAsDOMNode(curNode))) {
+        !IsEmptyInline(curNode)) {
       bOnlyBreaks = false;
       break;
     }
@@ -3087,7 +3087,7 @@ nsHTMLEditRules::WillMakeList(Selection* aSelection,
     // here's where we actually figure out what to do
     nsCOMPtr<nsIDOMNode> newBlock;
     NS_ENSURE_STATE(arrayOfNodes[i]->IsContent());
-    nsCOMPtr<nsIContent> curNode = arrayOfNodes[i]->AsContent();
+    OwningNonNull<nsIContent> curNode = *arrayOfNodes[i]->AsContent();
     int32_t offset;
     curParent = nsEditor::GetNodeLocation(curNode, &offset);
 
@@ -3104,7 +3104,7 @@ nsHTMLEditRules::WillMakeList(Selection* aSelection,
       NS_ENSURE_SUCCESS(res, res);
       prevListItem = 0;
       continue;
-    } else if (IsEmptyInline(GetAsDOMNode(curNode))) {
+    } else if (IsEmptyInline(curNode)) {
       // if curNode is an empty inline container, delete it
       NS_ENSURE_STATE(mHTMLEditor);
       res = mHTMLEditor->DeleteNode(curNode);
@@ -7776,20 +7776,19 @@ nsHTMLEditRules::SelectionEndpointInNode(nsINode* aNode, bool* aResult)
   return NS_OK;
 }
 
-///////////////////////////////////////////////////////////////////////////
-// IsEmptyInline:  return true if aNode is an empty inline container
-//
-//
+/**
+ * IsEmptyInline: Return true if aNode is an empty inline container
+ */
 bool
-nsHTMLEditRules::IsEmptyInline(nsIDOMNode *aNode)
+nsHTMLEditRules::IsEmptyInline(nsINode& aNode)
 {
-  if (aNode && IsInlineNode(aNode) && mHTMLEditor &&
-      mHTMLEditor->IsContainer(aNode))
-  {
-    bool bEmpty;
-    NS_ENSURE_TRUE(mHTMLEditor, false);
-    mHTMLEditor->IsEmptyNode(aNode, &bEmpty);
-    return bEmpty;
+  NS_ENSURE_TRUE(mHTMLEditor, false);
+  nsCOMPtr<nsIEditor> kungFuDeathGrip(mHTMLEditor);
+
+  if (IsInlineNode(aNode.AsDOMNode()) && mHTMLEditor->IsContainer(&aNode)) {
+    bool isEmpty = true;
+    mHTMLEditor->IsEmptyNode(&aNode, &isEmpty);
+    return isEmpty;
   }
   return false;
 }
@@ -7818,7 +7817,7 @@ nsHTMLEditRules::ListIsEmptyLine(nsTArray<OwningNonNull<nsINode>>& aArrayOfNodes
         return false;
       }
       brCount++;
-    } else if (IsEmptyInline(GetAsDOMNode(node))) {
+    } else if (IsEmptyInline(node)) {
       // Empty inline, keep looking
     } else {
       return false;
diff --git a/editor/libeditor/nsHTMLEditRules.h b/editor/libeditor/nsHTMLEditRules.h
index 2bd93d0a50cc..0aa162913024 100644
--- a/editor/libeditor/nsHTMLEditRules.h
+++ b/editor/libeditor/nsHTMLEditRules.h
@@ -339,7 +339,7 @@ protected:
   nsresult UpdateDocChangeRange(nsRange* aRange);
   nsresult ConfirmSelectionInBody();
   nsresult InsertMozBRIfNeeded(nsINode& aNode);
-  bool     IsEmptyInline(nsIDOMNode *aNode);
+  bool     IsEmptyInline(nsINode& aNode);
   bool     ListIsEmptyLine(nsTArray<mozilla::OwningNonNull<nsINode>>& arrayOfNodes);
   nsresult RemoveAlignment(nsIDOMNode * aNode, const nsAString & aAlignType, bool aChildrenOnly);
   nsresult MakeSureElemStartsOrEndsOnCR(nsIDOMNode *aNode, bool aStarts);