@@ -13,8 +13,6 @@ const ACCELERATED_CANVASES_GLOBAL = "__hfAcceleratedCanvases";
 /**
  * Remember canvases html-in-canvas cannot capture: WebGL, WebGPU, or handed to an OffscreenCanvas.
  * Self-contained: the engine and the preview run its source ahead of every author script.
- * A host page that walks a same-origin preview's DOM first gives its canvases the host's
- * prototype, so such a host (Studio) runs it too; each canvas lands in its own window's set.
  */
 export function installAcceleratedCanvasTracker(): void {
   const key = "__hfAcceleratedCanvases";
 
@@ -528,7 +528,7 @@ describe("composition loading overlay", () => {
 });
 
 describe("accelerated canvases", () => {
-  it("are tracked in the studio's own window as soon as the player loads", () => {
+  it("are tracked in Studio's window, whose prototype a preview canvas gets when Studio reaches it first", () => {
     expect("__hfAccelTracked" in HTMLCanvasElement.prototype.getContext).toBe(true);
     expect(Reflect.get(window, "__hfAcceleratedCanvases")).toBeInstanceOf(WeakSet);
   });
 
@@ -26,8 +26,6 @@ export function loadPlayerModule(): Promise<unknown> {
 
 if (typeof window !== "undefined") void loadPlayerModule().catch(() => {});
 
-// Studio's observers reach a preview's canvases before its runtime does, which gives them this
-// window's prototype. Tracking here too lets motion blur still see their WebGL and fall back.
 if (typeof window !== "undefined") installAcceleratedCanvasTracker();
 
 interface PlayerProps {