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diff --git a/frontend/src/components/examples/ExampleThumbnail.tsx b/frontend/src/components/examples/ExampleThumbnail.tsx
index 3c9a4840..81e3b74f 100644
--- a/frontend/src/components/examples/ExampleThumbnail.tsx
+++ b/frontend/src/components/examples/ExampleThumbnail.tsx
@@ -1,10 +1,14 @@
 /**
  * ExampleThumbnail — convention-based card thumbnail for an example.
  *
- *   1. Try /examples-thumbs/<id>.{webp,png} (real canvas screenshot,
- *      generated by velxio-prod's scripts/capture-example-thumbs.mjs).
- *   2. If that 404s — or if the example has no thumbnail file yet — fall
- *      back to the existing CircuitPreview component (the SVG/wire mock).
+ *   1. Try /examples-thumbs/<id>.webp (real canvas screenshot, generated by
+ *      velxio-prod's scripts/capture-example-thumbs.mjs).
+ *   2. If that 404s — or if the example has no thumbnail captured yet —
+ *      fall back to the existing CircuitPreview component (the SVG mock).
+ *
+ * WebP only (no PNG fallback): supported by ~97% of browsers in use; the
+ * remaining ~3% (very old Safari) gracefully fall back to CircuitPreview
+ * via the onError handler.
  *
  * The optional `example.thumbnail` field still wins if explicitly set.
  */
@@ -57,19 +61,13 @@ export const ExampleThumbnail = ({
   }
 
   return (
-    <picture>
-      <source
-        type="image/webp"
-        srcSet={`/examples-thumbs/${example.id}.webp`}
-      />
-      <img
-        src={`/examples-thumbs/${example.id}.png`}
-        alt={example.title}
-        className="example-preview-image"
-        style={style}
-        loading="lazy"
-        onError={() => setImgFailed(true)}
-      />
-    </picture>
+    <img
+      src={`/examples-thumbs/${example.id}.webp`}
+      alt={example.title}
+      className="example-preview-image"
+      style={style}
+      loading="lazy"
+      onError={() => setImgFailed(true)}
+    />
   );
 };