--- a/gfx/layers/wr/WebRenderLayerManager.cpp
+++ b/gfx/layers/wr/WebRenderLayerManager.cpp
@@ -274,16 +274,19 @@ WebRenderLayerManager::EndTransactionWit
                                                   contentSize,
                                                   aFilters);
 
   DiscardCompositorAnimations();
 
   mWidget->AddWindowOverlayWebRenderCommands(WrBridge(), builder, resourceUpdates);
   mWindowOverlayChanged = false;
 
+#if DUMP_LISTS
+  if (XRE_IsContentProcess()) mScrollData.Dump();
+#endif
   if (AsyncPanZoomEnabled()) {
     mScrollData.SetFocusTarget(mFocusTarget);
     mFocusTarget = FocusTarget();
 
     if (mIsFirstPaint) {
       mScrollData.SetIsFirstPaint();
       mIsFirstPaint = false;
     }