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Containers don’t offer a benefit over normal browsing for this, Firefox already blocks and isolates third party cookies.

• tgv 12d ago
  Caching is also a tracking signal.
  • mitxela 12d ago
    Caches are also isolated. One of the reasons you shouldn't use a JavaScript CDN any more.
    • oenton 12d ago
      I assume you mean a public CDN, like code.jquery.com. There’s still reasons to serve JavaScript from your own CDN, like code splitting and serving the bundles closer to the user.