Tag: browser-internals

All the articles with the tag "browser-internals".

• HTTP cache partitioning: the same image, downloaded twice

  Published:25 Aug 2026

  A page with a cross-site iframe requests the same image from the iframe and from the parent. Chrome downloads it twice; Firefox and Safari, once. Why the cache key differs across the three engines, why sharing a partition does not guarantee a hit, and what Cross-Origin Storage proposes to fix it.