--- a/editor/libeditor/HTMLEditRules.cpp
+++ b/editor/libeditor/HTMLEditRules.cpp
@@ -5693,16 +5693,28 @@ HTMLEditRules::PromoteRange(nsRange& aRa
         startNode = block;
         endNode = block;
         startOffset = 0;
         endOffset = block->Length();
       }
     }
   }
 
+  if (aOperationType == EditAction::insertText ||
+      aOperationType == EditAction::insertIMEText ||
+      aOperationType == EditAction::insertBreak ||
+      aOperationType == EditAction::deleteText) {
+     if (!startNode->IsContent() ||
+         !endNode->IsContent()) {
+       // GetPromotedPoint cannot promote node when action type is text
+       // operation and selected node isn't content node.
+       return;
+     }
+  }
+
   // Make a new adjusted range to represent the appropriate block content.
   // This is tricky.  The basic idea is to push out the range endpoints to
   // truly enclose the blocks that we will affect.
 
   EditorDOMPoint opStart =
     GetPromotedPoint(kStart, *startNode, startOffset, aOperationType);
   EditorDOMPoint opEnd =
     GetPromotedPoint(kEnd, *endNode, endOffset, aOperationType);