Información Técnica
| Código de estado HTTP | 200 |
| Versión HTTP | HTTP/1.1 |
| HTTPS | ✔ Disponible |
| Dirección IP | 151.101.121.91 |
| Software del servidor | Google Frontend |
| CDN | CDN (MISS, HIT) |
| Compresión | gzip |
Código de estado HTTP 200
Versión HTTP HTTP/1.1
HTTPS ✔ Disponible
Dirección IP 151.101.121.91
Software del servidor Google Frontend
CDN CDN (MISS, HIT)
Compresión gzip
Cadena de Redirecciones
| # | URL | Código de estado HTTP | Estado |
| 1 | https://developer.mozilla.org:443 | 302 | HTTP/2 302 |
| 2 | https://developer.mozilla.org/en-US/ | 200 | HTTP/2 200 |
#1 URL https://developer.mozilla.org:443
Código de estado HTTP 302
Estado HTTP/2 302
#2 URL https://developer.mozilla.org/en-US/
Código de estado HTTP 200
Estado HTTP/2 200
Rendimiento
| Resolución DNS | 6.2 ms |
| Conexión TCP | 7.3 ms |
| Negociación TLS | 4.5 ms |
| Tiempo hasta el primer byte (TTFB) | 15.7 ms |
| Descarga de contenido | 0.6 ms |
| Tiempo total de respuesta | 16.3 ms |
Resolución DNS 6.2 ms
Conexión TCP 7.3 ms
Negociación TLS 4.5 ms
Tiempo hasta el primer byte (TTFB) 15.7 ms
Descarga de contenido 0.6 ms
Tiempo total de respuesta 16.3 ms
Seguridad
| HTTPS | ✔ Activado |
| HSTS | ✔ max-age=63072000 |
| CSP | ✔ Configurado |
| X-Frame-Options | ✔ DENY |
| X-Content-Type-Options | ✔ nosniff |
| Política de Referrer | strict-origin-when-cross-origin |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Activado
HSTS ✔ max-age=63072000
CSP ✔ Configurado
X-Frame-Options ✔ DENY
X-Content-Type-Options ✔ nosniff
Política de Referrer strict-origin-when-cross-origin
HTTP/2 ⚠ HTTP/1.1
Comprobación SEO
| Título | MDN Web Docs |
| Meta descripción | The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps. |
| Canonical | https://developer.mozilla.org/en-US/ |
| Título Open Graph | MDN Web Docs |
| Descripción Open Graph | The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps. |
| Imagen Open Graph | https://developer.mozilla.org/mdn-social-image.46ac2375.png |
| Twitter Card | summary |
Título MDN Web Docs Meta descripción The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps. Canonical https://developer.mozilla.org/en-US/ Título Open Graph MDN Web Docs Descripción Open Graph The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps. Imagen Open Graph https://developer.mozilla.org/mdn-social-image.46ac2375.png Twitter Card summary Tecnologías Detectadas
| Tecnología | Google Analytics Node.js Stripe |
Tecnología Google Analytics Node.js Stripe
Cabeceras HTTP
| Etag
| "34b29c866c02c08f4298d4ab4cc2e18b" |
| 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
| 846ec1d84ae27abdb4200a491a46be66 |
| X-goog-hash
| crc32c=Aa8Tlw==, md5=NLKchmwCwI9CmNSrTMLhiw== |
| 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
| AJjja9YvOk3ZEqu1o9MHqKfTvhGRml4_joFkdoZZ22QbXCCpA8lwwki8zq8HNiFb8SbN-rlpd_DxaJk |
| X-frame-options
| DENY |
| X-goog-stored-content-length
| 118736 |
| X-content-type-options
| nosniff |
| X-goog-meta-goog-reserved-file-mtime
| 1787185877 |
| Strict-transport-security
| max-age=63072000 |
| Via
| 1.1 google, 1.1 varnish, 1.1 varnish |
| X-goog-generation
| 1787186781503790 |
| Expires
| Thu, 20 Aug 2026 02:11:03 GMT |
| Last-modified
| Thu, 20 Aug 2026 00:46:21 GMT |
| Cache-control
| public, max-age=3600 |
| Content-encoding
| gzip |
| Accept-ranges
| bytes |
| Age
| 449 |
| Date
| Thu, 20 Aug 2026 13:35:40 GMT |
| X-served-by
| cache-par-lfpb1150054-PAR, cache-par-lfpb1150054-PAR, cache-par-lfpb1150036-PAR |
| X-cache
| MISS, HIT |
| X-cache-hits
| 0, 0 |
| X-timer
| S1787232941.847404,VS0,VE2 |
| Vary
| Accept-Encoding |
| Content-length
| 16583 |
Meta Tags
| Viewport | width=device-width, initial-scale=1.0 |
| Description | The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps. |
| Position | 1 |
Etag "34b29c866c02c08f4298d4ab4cc2e18b"
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 846ec1d84ae27abdb4200a491a46be66
X-goog-hash crc32c=Aa8Tlw==, md5=NLKchmwCwI9CmNSrTMLhiw==
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 AJjja9YvOk3ZEqu1o9MHqKfTvhGRml4_joFkdoZZ22QbXCCpA8lwwki8zq8HNiFb8SbN-rlpd_DxaJk
X-frame-options DENY
X-goog-stored-content-length 118736
X-content-type-options nosniff
X-goog-meta-goog-reserved-file-mtime 1787185877
Strict-transport-security max-age=63072000
Via 1.1 google, 1.1 varnish, 1.1 varnish
X-goog-generation 1787186781503790
Expires Thu, 20 Aug 2026 02:11:03 GMT
Last-modified Thu, 20 Aug 2026 00:46:21 GMT
Cache-control public, max-age=3600
Content-encoding gzip
Accept-ranges bytes
Age 449
Date Thu, 20 Aug 2026 13:35:40 GMT
X-served-by cache-par-lfpb1150054-PAR, cache-par-lfpb1150054-PAR, cache-par-lfpb1150036-PAR
X-cache MISS, HIT
X-cache-hits 0, 0
X-timer S1787232941.847404,VS0,VE2
Vary Accept-Encoding
Content-length 16583
