On Amazon S3,
<link rel="prefetch"> is not work without crossorigin attribute.
Perhaps Amazon S3 only add CORS headers (Access-Control-Allow-Origin, Access-Control-Allow-Methods ...) when request headers has
When the document has no crossorigin prefetch tag, access to prefetch URL without origin header on Chrome.
This response is cached Chrome, and reuse next access by
This cache has no CORS headers. 😢
<!-- important --> crossorigin prefetch test (maybe success) Click to load script crossorigin test