--- a/gfx/wr/wrench/src/yaml_frame_reader.rs
+++ b/gfx/wr/wrench/src/yaml_frame_reader.rs
@@ -1727,16 +1727,23 @@ impl YamlFrameReader {
             }
             if let Some(is_scrollbar_container) = item["scrollbar-container"].as_bool() {
                 if is_scrollbar_container {
                     flags.insert(PrimitiveFlags::IS_SCROLLBAR_CONTAINER);
                 } else {
                     flags.remove(PrimitiveFlags::IS_SCROLLBAR_CONTAINER);
                 }
             }
+            if let Some(prefer_compositor_surface) = item["prefer-compositor-surface"].as_bool() {
+                if prefer_compositor_surface {
+                    flags.insert(PrimitiveFlags::PREFER_COMPOSITOR_SURFACE);
+                } else {
+                    flags.remove(PrimitiveFlags::PREFER_COMPOSITOR_SURFACE);
+                }
+            }
 
             let mut info = CommonItemProperties {
                 clip_rect,
                 clip_id: space_and_clip.clip_id,
                 spatial_id: space_and_clip.spatial_id,
                 hit_info: self.to_hit_testing_tag(&item["hit-testing-tag"]),
                 item_key: None,
                 flags,

--- a/gfx/wr/wrench/src/yaml_frame_writer.rs
+++ b/gfx/wr/wrench/src/yaml_frame_writer.rs
@@ -200,16 +200,17 @@ fn maybe_radius_yaml(radius: &BorderRadi
         Some(Yaml::Hash(table))
     }
 }
 
 fn common_node(v: &mut Table, clip_id_mapper: &mut ClipIdMapper, info: &CommonItemProperties) {
     rect_node(v, "clip-rect", &info.clip_rect);
     bool_node(v, "backface-visible", info.flags.contains(PrimitiveFlags::IS_BACKFACE_VISIBLE));
     bool_node(v, "scrollbar-container", info.flags.contains(PrimitiveFlags::IS_SCROLLBAR_CONTAINER));
+    bool_node(v, "prefer-compositor-surface", info.flags.contains(PrimitiveFlags::PREFER_COMPOSITOR_SURFACE));
     bool_node(v, "scrollbar-thumb", info.flags.contains(PrimitiveFlags::IS_SCROLLBAR_THUMB));
 
     clip_and_scroll_node(v, clip_id_mapper, info.clip_id, info.spatial_id);
 
     if let Some(tag) = info.hit_info {
         yaml_node(
             v,
             "hit-testing-tag",