--- a/editor/libeditor/EditorBase.cpp
+++ b/editor/libeditor/EditorBase.cpp
@@ -2267,16 +2267,25 @@ EditorBase::ScrollSelectionIntoView(bool
     selCon->ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
       region, nsISelectionController::SCROLL_OVERFLOW_HIDDEN);
   }
 
   return NS_OK;
 }
 
 void
+EditorBase::FindBetterInsertionPoint(nsCOMPtr<nsIDOMNode>& aNode,
+                                     int32_t& aOffset)
+{
+  nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
+  FindBetterInsertionPoint(node, aOffset);
+  aNode = do_QueryInterface(node);
+}
+
+void
 EditorBase::FindBetterInsertionPoint(nsCOMPtr<nsINode>& aNode,
                                      int32_t& aOffset)
 {
   if (aNode->IsNodeOfType(nsINode::eTEXT)) {
     // There is no "better" insertion point.
     return;
   }
 

--- a/editor/libeditor/EditorBase.h
+++ b/editor/libeditor/EditorBase.h
@@ -917,16 +917,18 @@ public:
    * the aTextNode.  If there is no IME selection, returns -1.
    */
   int32_t GetIMESelectionStartOffsetIn(nsINode* aTextNode);
 
   /**
    * FindBetterInsertionPoint() tries to look for better insertion point which
    * is typically the nearest text node and offset in it.
    */
+  void FindBetterInsertionPoint(nsCOMPtr<nsIDOMNode>& aNode,
+                                int32_t& aOffset);
   void FindBetterInsertionPoint(nsCOMPtr<nsINode>& aNode,
                                 int32_t& aOffset);
 
   /**
    * HideCaret() hides caret with nsCaret::AddForceHide() or may show carent
    * with nsCaret::RemoveForceHide().  This does NOT set visibility of
    * nsCaret.  Therefore, this is stateless.
    */

--- a/editor/libeditor/TextEditor.cpp
+++ b/editor/libeditor/TextEditor.cpp
@@ -611,16 +611,19 @@ TextEditor::ExtendSelectionForDelete(Sel
         // to make sure that pressing backspace will only delete the last
         // typed character.
         nsCOMPtr<nsIDOMNode> node;
         int32_t offset;
         result = GetStartNodeAndOffset(aSelection, getter_AddRefs(node), &offset);
         NS_ENSURE_SUCCESS(result, result);
         NS_ENSURE_TRUE(node, NS_ERROR_FAILURE);
 
+        // node might be anonymous DIV, so we find better text node
+        FindBetterInsertionPoint(node, offset);
+
         if (IsTextNode(node)) {
           nsCOMPtr<nsIDOMCharacterData> charData = do_QueryInterface(node);
           if (charData) {
             nsAutoString data;
             result = charData->GetData(data);
             NS_ENSURE_SUCCESS(result, result);
 
             if ((offset > 1 &&