HTTP/2 200 etag: "af33bac480c7ec81fef4e534421fdfd2" content-type: text/html server: Google Frontend x-goog-stored-content-encoding: identity referrer-policy: strict-origin-when-cross-origin x-goog-metageneration: 1 x-goog-storage-class: STANDARD x-cloud-trace-context: cea11f9ee7a2e2fa56e4a33a49b39dc5 x-goog-hash: crc32c=JOswUw==, md5=rzO6xIDH7IH+9OU0Qh/f0g== content-security-policy: default-src 'self'; script-src 'report-sample' 'self' 'wasm-unsafe-eval' assets.codepen.io production-assets.codepen.io https://js.stripe.com transcend-cdn.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; script-src-elem 'report-sample' 'self' 'wasm-unsafe-eval' assets.codepen.io production-assets.codepen.io https://js.stripe.com transcend-cdn.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; style-src 'report-sample' 'self' 'unsafe-inline' transcend-cdn.com; object-src 'none'; base-uri 'self'; connect-src 'self' developer.allizom.org bcd.developer.allizom.org bcd.developer.mozilla.org updates.developer.allizom.org updates.developer.mozilla.org https://incoming.telemetry.mozilla.org https://observatory-api.mdn.allizom.net https://observatory-api.mdn.mozilla.net telemetry.transcend.io telemetry.us.transcend.io transcend-cdn.com https://api.github.com/search/issues https://api.stripe.com; font-src 'self'; frame-src 'self' mdn.github.io *.mdnplay.dev *.mdnyalp.dev *.play.test.mdn.allizom.net https://v2.scrimba.com https://scrimba.com jsfiddle.net www.youtube-nocookie.com codepen.io survey.alchemer.com https://js.stripe.com; img-src 'self' data: *.githubusercontent.com *.gravatar.com mozillausercontent.com firefoxusercontent.com profile.stage.mozaws.net profile.accounts.firefox.com developer.mozilla.org mdn.dev wikipedia.org upload.wikimedia.org https://mdn.github.io/shared-assets/ https://mdn.dev/; manifest-src 'self'; media-src 'self' archive.org videos.cdn.mozilla.net https://mdn.github.io/shared-assets/; child-src 'self'; worker-src 'self'; x-guploader-uploadid: AKhXX7KvavFovyaSLx30XnqpK26UCy7c9WuXub97L0TCI7Q1aQoe_C8064g6J5T2eC8O3snR x-frame-options: DENY x-goog-stored-content-length: 163364 x-content-type-options: nosniff x-goog-meta-goog-reserved-file-mtime: 1784422608 strict-transport-security: max-age=63072000 via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish x-goog-generation: 1784423472435165 expires: Sun, 19 Jul 2026 09:55:48 GMT last-modified: Sun, 19 Jul 2026 01:11:12 GMT cache-control: public, max-age=3600 content-encoding: br accept-ranges: bytes date: Sun, 19 Jul 2026 08:58:18 GMT age: 149 x-served-by: cache-bfi-krnt7300092-BFI, cache-bfi-krnt7300092-BFI, cache-bfi-krnt7300092-BFI, cache-ewr-kewr1740033-EWR x-cache: MISS, MISS, HIT x-cache-hits: 0, 0, 1 x-timer: S1784451498.136370,VS0,VE1 vary: Accept-Encoding content-length: 18804