--- a/layout/painting/nsDisplayList.h
+++ b/layout/painting/nsDisplayList.h
@@ -5941,31 +5941,32 @@ public:
   {
     return mContainerASR;
   }
 
 private:
   // This stores the ASR that this sticky container item would have assuming it
   // has no fixed descendants. This may be the same as the ASR returned by
   // GetActiveScrolledRoot(), or it may be a descendant of that.
-  const ActiveScrolledRoot* mContainerASR;
+  RefPtr<const ActiveScrolledRoot> mContainerASR;
 };
 
 class nsDisplayFixedPosition : public nsDisplayOwnLayer {
 public:
   nsDisplayFixedPosition(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
                          nsDisplayList* aList,
                          const ActiveScrolledRoot* aActiveScrolledRoot,
                          const ActiveScrolledRoot* aContainerASR);
   nsDisplayFixedPosition(nsDisplayListBuilder* aBuilder,
                          const nsDisplayFixedPosition& aOther)
     : nsDisplayOwnLayer(aBuilder, aOther)
     , mAnimatedGeometryRootForScrollMetadata(aOther.mAnimatedGeometryRootForScrollMetadata)
     , mIndex(aOther.mIndex)
     , mIsFixedBackground(aOther.mIsFixedBackground)
+    , mContainerASR(aOther.mContainerASR)
   {
     MOZ_COUNT_CTOR(nsDisplayFixedPosition);
   }
 
   static nsDisplayFixedPosition* CreateForFixedBackground(nsDisplayListBuilder* aBuilder,
                                                           nsIFrame* aFrame,
                                                           nsDisplayBackgroundImage* aImage,
                                                           uint32_t aIndex);
@@ -6025,17 +6026,17 @@ protected:
   nsDisplayFixedPosition(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
                          nsDisplayList* aList, uint32_t aIndex);
   void Init(nsDisplayListBuilder* aBuilder);
   ViewID GetScrollTargetId();
 
   RefPtr<AnimatedGeometryRoot> mAnimatedGeometryRootForScrollMetadata;
   uint32_t mIndex;
   bool mIsFixedBackground;
-  const ActiveScrolledRoot* mContainerASR;
+  RefPtr<const ActiveScrolledRoot> mContainerASR;
 };
 
 class nsDisplayTableFixedPosition : public nsDisplayFixedPosition
 {
 public:
   static nsDisplayTableFixedPosition* CreateForFixedBackground(nsDisplayListBuilder* aBuilder,
                                                                nsIFrame* aFrame,
                                                                nsDisplayBackgroundImage* aImage,