HTTP Headers Analysis for https://mozilla.org

Detected Technologies from Headers

See all in URL Inspect 9

AWS API Gateway

AWS Active incidents

Contentful

Google Analytics

Google Tag Manager

Sentry

Stripe

Varnish

YouTube

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=31536000

Content-Security-Policy

Basic

frame-src; frame-ancestors; upgrade-insecure-requests; +10 more Analyze

Content-Security-Policy-Report-Only

Basic

frame-src; frame-ancestors; upgrade-insecure-requests; +10 more Analyze

X-Frame-Options

Excellent

DENY

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin-when-cross-origin

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Improve CSP by adding more specific directives and removing 'unsafe-inline'
• Consider adding Permissions-Policy to control browser features

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

Vary

Performance

Accept-Language, Accept-Encoding

accept-ranges: bytes
connection: close
vary: Accept-Language, Accept-Encoding

Caching Headers

Age

Caching

0

Cache-Control

Caching

max-age=600

Etag

Caching

"5debb317515f4c56779815e4512c72d8"

Expires

Caching

Sat, 17 Oct 2026 14:56:07 GMT

age: 0
cache-control: max-age=600
etag: "5debb317515f4c56779815e4512c72d8"
expires: Sat, 17 Oct 2026 14:56:07 GMT

Content Headers

Content-Length

Content

47804

Content-Type

Content

text/html; charset=utf-8

content-length: 47804
content-type: text/html; charset=utf-8

Server Headers

Server

granian

server: granian

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sat, 17 Oct 2026 15:10:33 GMT

Via

Other

1.1 google, 1.1 varnish, 1.1 varnish

X-Backend-Server

Other

bedrock-6c4d9cb996-gm6hz.gcp-us-west1

X-Cache

Other

MISS, HIT

X-Cache-Hits

Other

0, 0

X-Clacks-Overhead

Other

GNU Terry Pratchett

X-Served-By

Other

cache-ewr-kewr1740096-EWR, cache-ewr-kewr1740096-EWR, cache-ewr-kewr1740093-EWR

X-Timer

Other

S1792249834.681063,VS0,VE161

date: Sat, 17 Oct 2026 15:10:33 GMT
via: 1.1 google, 1.1 varnish, 1.1 varnish
x-backend-server: bedrock-6c4d9cb996-gm6hz.gcp-us-west1
x-cache: MISS, HIT
x-cache-hits: 0, 0
x-clacks-overhead: GNU Terry Pratchett
x-served-by: cache-ewr-kewr1740096-EWR, cache-ewr-kewr1740096-EWR, cache-ewr-kewr1740093-EWR
x-timer: S1792249834.681063,VS0,VE161

Recommendations

Enable compression (gzip/brotli) to improve performance