--- a/gfx/layers/wr/WebRenderCommandBuilder.cpp
+++ b/gfx/layers/wr/WebRenderCommandBuilder.cpp
@@ -915,31 +915,30 @@ Grouper::ConstructGroups(WebRenderComman
       RefPtr<WebRenderGroupData> groupData =
         aCommandBuilder->CreateOrRecycleWebRenderUserData<WebRenderGroupData>(item);
 
       // Initialize groupData->mFollowingGroup
       // TODO: compute the group bounds post-grouping, so that they can be
       // tighter for just the sublist that made it into this group.
       // We want to ensure the tight bounds are still clipped by area
       // that we're building the display list for.
-      if (groupData->mFollowingGroup.mKey) {
-        if (!groupData->mFollowingGroup.mGroupBounds.IsEqualEdges(currentGroup->mGroupBounds) ||
-            groupData->mFollowingGroup.mScale != currentGroup->mScale ||
-            groupData->mFollowingGroup.mAppUnitsPerDevPixel != currentGroup->mAppUnitsPerDevPixel) {
-          if (groupData->mFollowingGroup.mAppUnitsPerDevPixel != currentGroup->mAppUnitsPerDevPixel) {
-            printf("app unit change following: %d %d\n", groupData->mFollowingGroup.mAppUnitsPerDevPixel, currentGroup->mAppUnitsPerDevPixel);
-          }
-          // The group changed size
-          GP("Inner group size change\n");
+      if (!groupData->mFollowingGroup.mGroupBounds.IsEqualEdges(currentGroup->mGroupBounds) ||
+          groupData->mFollowingGroup.mScale != currentGroup->mScale ||
+          groupData->mFollowingGroup.mAppUnitsPerDevPixel != currentGroup->mAppUnitsPerDevPixel) {
+        if (groupData->mFollowingGroup.mAppUnitsPerDevPixel != currentGroup->mAppUnitsPerDevPixel) {
+          GP("app unit change following: %d %d\n", groupData->mFollowingGroup.mAppUnitsPerDevPixel, currentGroup->mAppUnitsPerDevPixel);
+        }
+        // The group changed size
+        GP("Inner group size change\n");
+        groupData->mFollowingGroup.ClearItems();
+        if (groupData->mFollowingGroup.mKey) {
+          IntSize size = currentGroup->mGroupBounds.Size().ScaleToNearestPixels(currentGroup->mScale.width, currentGroup->mScale.height, mAppUnitsPerDevPixel);
+          groupData->mFollowingGroup.mInvalidRect = IntRect(IntPoint(0, 0), size);
           aCommandBuilder->mManager->AddImageKeyForDiscard(groupData->mFollowingGroup.mKey.value());
           groupData->mFollowingGroup.mKey = Nothing();
-          groupData->mFollowingGroup.ClearItems();
-
-          IntSize size = currentGroup->mGroupBounds.Size().ScaleToNearestPixels(currentGroup->mScale.width, currentGroup->mScale.height, mAppUnitsPerDevPixel);
-          groupData->mFollowingGroup.mInvalidRect = IntRect(IntPoint(0, 0), size);
         }
       }
       groupData->mFollowingGroup.mGroupBounds = currentGroup->mGroupBounds;
       groupData->mFollowingGroup.mAppUnitsPerDevPixel = currentGroup->mAppUnitsPerDevPixel;
       groupData->mFollowingGroup.mGroupOffset = currentGroup->mGroupOffset;
       groupData->mFollowingGroup.mScale = currentGroup->mScale;
 
       currentGroup = &groupData->mFollowingGroup;