diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index a50de435b811..3646da9d5c0b 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -1494,6 +1494,8 @@ nsIDocument::nsIDocument()
     mDOMInteractiveSet(false),
     mDOMCompleteSet(false),
     mAutoFocusFired(false),
+    mScrolledToRefAlready(false),
+    mChangeScrollPosWhenScrollingToRef(false),
     mIsScopedStyleEnabled(eScopedStyle_Unknown),
     mPendingFullscreenRequests(0),
     mCompatMode(eCompatibility_FullStandards),
@@ -1557,8 +1559,6 @@ nsDocument::nsDocument(const char* aContentType)
   , mOnloadBlockCount(0)
   , mAsyncOnloadBlockCount(0)
   , mPreloadPictureDepth(0)
-  , mScrolledToRefAlready(0)
-  , mChangeScrollPosWhenScrollingToRef(0)
   , mValidWidth(false)
   , mValidHeight(false)
   , mAutoSize(false)
@@ -9434,7 +9434,7 @@ nsIDocument::TriggerAutoFocus()
 }
 
 void
-nsDocument::SetScrollToRef(nsIURI *aDocumentURI)
+nsIDocument::SetScrollToRef(nsIURI* aDocumentURI)
 {
   if (!aDocumentURI) {
     return;
@@ -9466,7 +9466,7 @@ nsDocument::SetScrollToRef(nsIURI *aDocumentURI)
 }
 
 void
-nsDocument::ScrollToRef()
+nsIDocument::ScrollToRef()
 {
   if (mScrolledToRefAlready) {
     nsCOMPtr<nsIPresShell> shell = GetShell();
@@ -9525,18 +9525,6 @@ nsDocument::ScrollToRef()
   }
 }
 
-void
-nsDocument::ResetScrolledToRefAlready()
-{
-  mScrolledToRefAlready = false;
-}
-
-void
-nsDocument::SetChangeScrollPosWhenScrollingToRef(bool aValue)
-{
-  mChangeScrollPosWhenScrollingToRef = aValue;
-}
-
 void
 nsIDocument::RegisterActivityObserver(nsISupports* aSupports)
 {
diff --git a/dom/base/nsDocument.h b/dom/base/nsDocument.h
index 97334d413f44..559a6efb1925 100644
--- a/dom/base/nsDocument.h
+++ b/dom/base/nsDocument.h
@@ -591,11 +591,6 @@ public:
   // Only BlockOnload should call this!
   void AsyncBlockOnload();
 
-  virtual void SetScrollToRef(nsIURI *aDocumentURI) override;
-  virtual void ScrollToRef() override;
-  virtual void ResetScrolledToRefAlready() override;
-  virtual void SetChangeScrollPosWhenScrollingToRef(bool aValue) override;
-
   // Returns the size of the mBlockedTrackingNodes array. (nsIDocument.h)
   //
   // This array contains nodes that have been blocked to prevent
@@ -792,10 +787,6 @@ private:
   // Set if we've found a URL for the current picture
   nsString mPreloadPictureFoundSource;
 
-  nsCString mScrollToRef;
-  uint8_t mScrolledToRefAlready : 1;
-  uint8_t mChangeScrollPosWhenScrollingToRef : 1;
-
   // These member variables cache information about the viewport so we don't have to
   // recalculate it each time.
   bool mValidWidth, mValidHeight;
diff --git a/dom/base/nsIDocument.h b/dom/base/nsIDocument.h
index 306f05224c38..afa5266d182e 100644
--- a/dom/base/nsIDocument.h
+++ b/dom/base/nsIDocument.h
@@ -2769,10 +2769,17 @@ public:
   void SetAutoFocusElement(Element* aAutoFocusElement);
   void TriggerAutoFocus();
 
-  virtual void SetScrollToRef(nsIURI *aDocumentURI) = 0;
-  virtual void ScrollToRef() = 0;
-  virtual void ResetScrolledToRefAlready() = 0;
-  virtual void SetChangeScrollPosWhenScrollingToRef(bool aValue) = 0;
+  void SetScrollToRef(nsIURI* aDocumentURI);
+  void ScrollToRef();
+  void ResetScrolledToRefAlready()
+  {
+    mScrolledToRefAlready = false;
+  }
+
+  void SetChangeScrollPosWhenScrollingToRef(bool aValue)
+  {
+    mChangeScrollPosWhenScrollingToRef = aValue;
+  }
 
   using mozilla::dom::DocumentOrShadowRoot::GetElementById;
   using mozilla::dom::DocumentOrShadowRoot::GetElementsByTagName;
@@ -3874,6 +3881,9 @@ protected:
   bool mDOMCompleteSet: 1;
   bool mAutoFocusFired: 1;
 
+  bool mScrolledToRefAlready : 1;
+  bool mChangeScrollPosWhenScrollingToRef : 1;
+
   // Whether <style scoped> support is enabled in this document.
   enum { eScopedStyle_Unknown, eScopedStyle_Disabled, eScopedStyle_Enabled };
   unsigned int mIsScopedStyleEnabled : 2;
@@ -4106,6 +4116,8 @@ protected:
 
   nsWeakPtr mAutoFocusElement;
 
+  nsCString mScrollToRef;
+
   // Weak reference to the scope object (aka the script global object)
   // that, unlike mScriptGlobalObject, is never unset once set. This
   // is a weak reference to avoid leaks due to circular references.