Mozilla.org - Developer.mozilla.org

cache-control: no-store
server: Google Frontend
x-cloud-trace-context: 9f10a8a343fe7442fd43d8b9e968a723
location: /en-US/
accept-ranges: bytes
via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish
content-type: text/plain; charset=utf-8
date: Fri, 06 Feb 2026 20:53:45 GMT
x-served-by: cache-par-lfpb1150030-PAR, cache-par-lfpb1150074-PAR, cache-fra-etou8220022-FRA
x-cache: MISS, MISS, MISS
x-cache-hits: 0, 0, 0
x-timer: S1770411225.312889,VS0,VE137
vary: Accept
content-length: 29

HTTP/2 200 
content-type: text/html
x-content-type-options: nosniff
content-security-policy: default-src 'self'; script-src 'report-sample' 'self' 'wasm-unsafe-eval' https://www.google-analytics.com/analytics.js https://*.googletagmanager.com assets.codepen.io production-assets.codepen.io https://js.stripe.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; script-src-elem 'report-sample' 'self' 'wasm-unsafe-eval' https://www.google-analytics.com/analytics.js https://*.googletagmanager.com assets.codepen.io production-assets.codepen.io https://js.stripe.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; style-src 'report-sample' 'self' 'unsafe-inline'; 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://*.google-analytics.com https://*.analytics.google.com https://*.googletagmanager.com https://incoming.telemetry.mozilla.org https://observatory-api.mdn.allizom.net https://observatory-api.mdn.mozilla.net https://api.github.com/search/issues stats.g.doubleclick.net 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 *.googleusercontent.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/ https://*.google-analytics.com https://*.googletagmanager.com www.gstatic.com; 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-goog-stored-content-encoding: identity
x-goog-storage-class: STANDARD
referrer-policy: strict-origin-when-cross-origin
x-goog-stored-content-length: 111469
x-goog-generation: 1770340033269557
x-goog-hash: crc32c=3lw89g==, md5=xbfAEU13jJE4ufvtQFpJeA==
expires: Fri, 06 Feb 2026 02:14:24 GMT
server: Google Frontend
x-guploader-uploadid: AJRbA5VCy7mM2Ea5yRIFXRtwDzhz2wucThPsBageqMZympZW5fpq42HEROZTVJxCaa6k_rcmwQcos6c
x-goog-metageneration: 1
last-modified: Fri, 06 Feb 2026 01:07:13 GMT
strict-transport-security: max-age=63072000
x-cloud-trace-context: 6970394f58435673e1346abeb3f7cdc8
origin-trial: AxVILwizhbMjxFeHOn1P3R8niO1RJY/smaK4B4d1rLzc1gTaxtXMSaTi+FoigYgCw40uFRDwFcEAeqDR+vVLOW4AAABfeyJvcmlnaW4iOiJodHRwczovL2RldmVsb3Blci5tb3ppbGxhLm9yZyIsImZlYXR1cmUiOiJQcml2YXRlQXR0cmlidXRpb25WMiIsImV4cGlyeSI6MTc0MjA3OTYwMH0=
via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish
etag: "c5b7c0114d778c9138b9fbed405a4978"
cache-control: public, max-age=3600
x-goog-meta-goog-reserved-file-mtime: 1770338848
x-frame-options: DENY
content-encoding: br
accept-ranges: bytes
date: Fri, 06 Feb 2026 20:53:45 GMT
age: 1758
x-served-by: cache-par-lfpb1150054-PAR, cache-par-lfpb1150054-PAR, cache-fra-etou8220022-FRA
x-cache: MISS, HIT, HIT
x-cache-hits: 0, 2, 1
x-timer: S1770411225.458851,VS0,VE2
vary: Accept-Encoding
content-length: 13438