--- a/dom/base/Selection.cpp
+++ b/dom/base/Selection.cpp
@@ -3874,42 +3874,32 @@ Selection::NotifySelectionListeners()
 
   short reason = frameSelection->PopReason();
   for (auto& listener : selectionListeners) {
     listener->NotifySelectionChanged(domdoc, this, reason);
   }
   return NS_OK;
 }
 
-NS_IMETHODIMP
+void
 Selection::StartBatchChanges()
 {
   if (mFrameSelection) {
     RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
     frameSelection->StartBatchChanges();
   }
-  return NS_OK;
 }
 
-
-
-NS_IMETHODIMP
-Selection::EndBatchChanges()
-{
-  return EndBatchChangesInternal();
-}
-
-nsresult
-Selection::EndBatchChangesInternal(int16_t aReason)
+void
+Selection::EndBatchChanges(int16_t aReason)
 {
   if (mFrameSelection) {
     RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
     frameSelection->EndBatchChanges(aReason);
   }
-  return NS_OK;
 }
 
 void
 Selection::AddSelectionChangeBlocker()
 {
   mSelectionChangeBlockerCount++;
 }
 

--- a/dom/base/Selection.h
+++ b/dom/base/Selection.h
@@ -67,17 +67,22 @@ public:
   Selection();
   explicit Selection(nsFrameSelection *aList);
 
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(Selection, nsISelectionPrivate)
   NS_DECL_NSISELECTION
   NS_DECL_NSISELECTIONPRIVATE
 
-  nsresult EndBatchChangesInternal(int16_t aReason = nsISelectionListener::NO_REASON);
+  // match this up with EndbatchChanges. will stop ui updates while multiple
+  // selection methods are called
+  void StartBatchChanges();
+
+  // match this up with StartBatchChanges
+  void EndBatchChanges(int16_t aReason = nsISelectionListener::NO_REASON);
 
   nsIDocument* GetParentObject() const;
 
   // utility methods for scrolling the selection into view
   nsPresContext* GetPresContext() const;
   nsIPresShell* GetPresShell() const;
   nsFrameSelection* GetFrameSelection() const { return mFrameSelection; }
   // Returns a rect containing the selection region, and frame that that
@@ -528,17 +533,17 @@ public:
     if (mSelection) {
       mSelection->StartBatchChanges();
     }
   }
 
   ~SelectionBatcher()
   {
     if (mSelection) {
-      mSelection->EndBatchChangesInternal();
+      mSelection->EndBatchChanges();
     }
   }
 };
 
 class MOZ_RAII AutoHideSelectionChanges final
 {
 private:
   RefPtr<Selection> mSelection;

--- a/dom/base/nsISelectionPrivate.idl
+++ b/dom/base/nsISelectionPrivate.idl
@@ -31,26 +31,16 @@ native ScrollAxis(nsIPresShell::ScrollAx
 interface nsISelectionPrivate : nsISelection
  {
     const short ENDOFPRECEDINGLINE=0;
     const short STARTOFNEXTLINE=1;
 
     attribute boolean interlinePosition;
     [noscript] attribute nsIContent ancestorLimiter;
 
-    /* startBatchChanges
-       match this up with endbatchChanges. will stop ui updates while multiple selection methods are called
-    */
-    [noscript] void startBatchChanges();
-
-    /* endBatchChanges
-       match this up with startBatchChanges
-    */
-    [noscript] void endBatchChanges();
-
     DOMString  toStringWithFormat(in string formatType, in unsigned long flags, in int32_t wrapColumn);
     void  addSelectionListener(in nsISelectionListener newListener);
     void  removeSelectionListener(in nsISelectionListener listenerToRemove);
 
     /* Table selection stuff
        We should probably move this and table-related
        items in nsFrameSelection  to a
        new nsITableSelection interface

--- a/dom/events/ContentEventHandler.cpp
+++ b/dom/events/ContentEventHandler.cpp
@@ -3247,17 +3247,17 @@ ContentEventHandler::OnSelectionEvent(Wi
       } else {
         rv = mSelection->Extend(endNode, endNodeOffset);
       }
     }
   }
 
   // Pass the eSetSelection events reason along with the BatchChange-end
   // selection change notifications.
-  mSelection->EndBatchChangesInternal(aEvent->mReason);
+  mSelection->EndBatchChanges(aEvent->mReason);
   NS_ENSURE_SUCCESS(rv, rv);
 
   mSelection->ScrollIntoViewInternal(
     nsISelectionController::SELECTION_FOCUS_REGION,
     false, nsIPresShell::ScrollAxis(), nsIPresShell::ScrollAxis());
   aEvent->mSucceeded = true;
   return NS_OK;
 }