diff --git a/editor/libeditor/HTMLEditRules.cpp b/editor/libeditor/HTMLEditRules.cpp
index bc8505b65ee2..2baf5874805c 100644
--- a/editor/libeditor/HTMLEditRules.cpp
+++ b/editor/libeditor/HTMLEditRules.cpp
@@ -1968,7 +1968,9 @@ EditActionResult HTMLEditRules::WillInsertParagraphSeparator() {
        blockParent->IsAnyOfHTMLElements(nsGkAtoms::p, nsGkAtoms::div))) {
     AutoEditorDOMPointChildInvalidator lockOffset(atStartOfSelection);
     // Paragraphs: special rules to look for <br>s
-    EditActionResult result = ReturnInParagraph(*blockParent);
+    EditActionResult result =
+        MOZ_KnownLive(HTMLEditorRef())
+            .HandleInsertParagraphInParagraph(*blockParent);
     if (NS_WARN_IF(result.Failed())) {
       return result;
     }
@@ -1979,9 +1981,9 @@ EditActionResult HTMLEditRules::WillInsertParagraphSeparator() {
       lockOffset.Cancel();
       return result;
     }
-    // Fall through, if ReturnInParagraph() didn't handle it.
+    // Fall through, if HandleInsertParagraphInParagraph() didn't handle it.
     MOZ_ASSERT(!result.Canceled(),
-               "ReturnInParagraph canceled this edit action, "
+               "HandleInsertParagraphInParagraph canceled this edit action, "
                "WillInsertBreak() needs to handle such case");
   }
 
@@ -8100,8 +8102,9 @@ nsresult HTMLEditRules::ReturnInHeader(Element& aHeader, nsINode& aNode,
   return NS_OK;
 }
 
-EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
-  MOZ_ASSERT(IsEditorDataAvailable());
+EditActionResult HTMLEditor::HandleInsertParagraphInParagraph(
+    Element& aParentDivOrP) {
+  MOZ_ASSERT(IsEditActionDataAvailable());
 
   nsRange* firstRange = SelectionRefPtr()->GetRangeAt(0);
   if (NS_WARN_IF(!firstRange)) {
@@ -8180,9 +8183,7 @@ EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
     }
   }
 
-  bool doesCRCreateNewP =
-      HTMLEditorRef().GetReturnInParagraphCreatesNewParagraph();
-
+  bool doesCRCreateNewP = GetReturnInParagraphCreatesNewParagraph();
   bool splitAfterNewBR = false;
   nsCOMPtr<nsIContent> brContent;
 
@@ -8196,9 +8197,8 @@ EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
     // at beginning of text node?
     if (atStartOfSelection.IsStartOfContainer()) {
       // is there a BR prior to it?
-      brContent = HTMLEditorRef().GetPriorHTMLSibling(
-          atStartOfSelection.GetContainer());
-      if (!brContent || !HTMLEditorRef().IsVisibleBRElement(brContent) ||
+      brContent = GetPriorHTMLSibling(atStartOfSelection.GetContainer());
+      if (!brContent || !IsVisibleBRElement(brContent) ||
           EditorBase::IsPaddingBRElementForEmptyLastLine(*brContent)) {
         pointToInsertBR.Set(atStartOfSelection.GetContainer());
         brContent = nullptr;
@@ -8206,9 +8206,8 @@ EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
     } else if (atStartOfSelection.IsEndOfContainer()) {
       // we're at the end of text node...
       // is there a BR after to it?
-      brContent =
-          HTMLEditorRef().GetNextHTMLSibling(atStartOfSelection.GetContainer());
-      if (!brContent || !HTMLEditorRef().IsVisibleBRElement(brContent) ||
+      brContent = GetNextHTMLSibling(atStartOfSelection.GetContainer());
+      if (!brContent || !IsVisibleBRElement(brContent) ||
           EditorBase::IsPaddingBRElementForEmptyLastLine(*brContent)) {
         pointToInsertBR.Set(atStartOfSelection.GetContainer());
         DebugOnly<bool> advanced = pointToInsertBR.AdvanceOffset();
@@ -8221,9 +8220,8 @@ EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
       if (doesCRCreateNewP) {
         ErrorResult error;
         nsCOMPtr<nsIContent> newLeftDivOrP =
-            MOZ_KnownLive(HTMLEditorRef())
-                .SplitNodeWithTransaction(pointToSplitParentDivOrP, error);
-        if (NS_WARN_IF(!CanHandleEditAction())) {
+            SplitNodeWithTransaction(pointToSplitParentDivOrP, error);
+        if (NS_WARN_IF(Destroyed())) {
           error.SuppressException();
           return EditActionResult(NS_ERROR_EDITOR_DESTROYED);
         }
@@ -8244,13 +8242,13 @@ EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
   } else {
     // not in a text node.
     // is there a BR prior to it?
-    nsCOMPtr<nsIContent> nearNode;
-    nearNode = HTMLEditorRef().GetPreviousEditableHTMLNode(atStartOfSelection);
-    if (!nearNode || !HTMLEditorRef().IsVisibleBRElement(nearNode) ||
+    nsCOMPtr<nsIContent> nearNode =
+        GetPreviousEditableHTMLNode(atStartOfSelection);
+    if (!nearNode || !IsVisibleBRElement(nearNode) ||
         EditorBase::IsPaddingBRElementForEmptyLastLine(*nearNode)) {
       // is there a BR after it?
-      nearNode = HTMLEditorRef().GetNextEditableHTMLNode(atStartOfSelection);
-      if (!nearNode || !HTMLEditorRef().IsVisibleBRElement(nearNode) ||
+      nearNode = GetNextEditableHTMLNode(atStartOfSelection);
+      if (!nearNode || !IsVisibleBRElement(nearNode) ||
           EditorBase::IsPaddingBRElementForEmptyLastLine(*nearNode)) {
         pointToInsertBR = atStartOfSelection;
         splitAfterNewBR = true;
@@ -8266,9 +8264,8 @@ EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
       return EditActionResult(NS_OK);
     }
 
-    brContent = MOZ_KnownLive(HTMLEditorRef())
-                    .InsertBRElementWithTransaction(pointToInsertBR);
-    if (NS_WARN_IF(!CanHandleEditAction())) {
+    brContent = InsertBRElementWithTransaction(pointToInsertBR);
+    if (NS_WARN_IF(Destroyed())) {
       return EditActionResult(NS_ERROR_EDITOR_DESTROYED);
     }
     NS_WARNING_ASSERTION(brContent, "Failed to create a <br> element");
@@ -8281,8 +8278,7 @@ EditActionResult HTMLEditRules::ReturnInParagraph(Element& aParentDivOrP) {
     }
   }
   EditActionResult result(
-      MOZ_KnownLive(HTMLEditorRef())
-          .SplitParagraph(aParentDivOrP, pointToSplitParentDivOrP, brContent));
+      SplitParagraph(aParentDivOrP, pointToSplitParentDivOrP, brContent));
   result.MarkAsHandled();
   if (NS_WARN_IF(result.Failed())) {
     return result;
diff --git a/editor/libeditor/HTMLEditRules.h b/editor/libeditor/HTMLEditRules.h
index e8d6f38e86a7..bdf4aeab20f6 100644
--- a/editor/libeditor/HTMLEditRules.h
+++ b/editor/libeditor/HTMLEditRules.h
@@ -473,20 +473,6 @@ class HTMLEditRules : public TextEditRules {
   MOZ_MUST_USE nsresult ReturnInHeader(Element& aHeader, nsINode& aNode,
                                        int32_t aOffset);
 
-  /**
-   * ReturnInParagraph() does the right thing for Enter key press or
-   * 'insertParagraph' command in aParentDivOrP.  aParentDivOrP will be
-   * split at start of first selection range.
-   *
-   * @param aParentDivOrP   The parent block.  This must be <p> or <div>
-   *                        element.
-   * @return                Returns with NS_OK if this doesn't meat any
-   *                        unexpected situation.  If this method tries to
-   *                        split the paragraph, marked as handled.
-   */
-  MOZ_CAN_RUN_SCRIPT
-  MOZ_MUST_USE EditActionResult ReturnInParagraph(Element& aParentDivOrP);
-
   /**
    * ReturnInListItem() handles insertParagraph command (i.e., handling
    * Enter key press) in a list item element.
diff --git a/editor/libeditor/HTMLEditor.h b/editor/libeditor/HTMLEditor.h
index 458cfff71baa..b07d7abaf383 100644
--- a/editor/libeditor/HTMLEditor.h
+++ b/editor/libeditor/HTMLEditor.h
@@ -1798,6 +1798,20 @@ class HTMLEditor final : public TextEditor,
       Element& aParentDivOrP,
       const EditorDOMPointBase<PT, CT>& aStartOfRightNode, nsIContent* aBRNode);
 
+  /**
+   * HandleInsertParagraphInParagraph() does the right thing for Enter key
+   * press or 'insertParagraph' command in aParentDivOrP.  aParentDivOrP will
+   * be split at start of first selection range.
+   *
+   * @param aParentDivOrP   The parent block.  This must be <p> or <div>
+   *                        element.
+   * @return                Returns with NS_OK if this doesn't meat any
+   *                        unexpected situation.  If this method tries to
+   *                        split the paragraph, marked as handled.
+   */
+  MOZ_CAN_RUN_SCRIPT MOZ_MUST_USE EditActionResult
+  HandleInsertParagraphInParagraph(Element& aParentDivOrP);
+
  protected:  // Called by helper classes.
   virtual void OnStartToHandleTopLevelEditSubAction(
       EditSubAction aEditSubAction, nsIEditor::EDirection aDirection) override;