HTTP Headers Analysis for https://telemetry.mozilla.org

Detected Technologies from Headers

See all in URL Inspect 3

Fastly

GitHub

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Add Content-Security-Policy header to prevent XSS attacks
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Add X-Content-Type-Options: nosniff
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

Vary

Performance

Accept-Encoding

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

Caching Headers

Age

Caching

3916

Cache-Control

Caching

public,max-age=3600

Etag

Caching

"6a2991e7-33e7"

Last-Modified

Caching

Wed, 10 Jun 2026 16:33:43 GMT

age: 3916
cache-control: public,max-age=3600
etag: "6a2991e7-33e7"
last-modified: Wed, 10 Jun 2026 16:33:43 GMT

Content Headers

Content-Length

Content

13287

Content-Type

Content

text/html; charset=utf-8

content-length: 13287
content-type: text/html; charset=utf-8

Server Headers

Server

GitHub.com

server: GitHub.com

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

clear

Date

Other

Wed, 07 Oct 2026 20:27:41 GMT

Via

Other

1.1 varnish, 1.1 google

X-Cache

Other

MISS

X-Cache-Hits

Other

0

X-Fastly-Request-Id

Other

fdcc11e876234dc6610050fed0bbd62713519f8e

X-Github-Edge-Region

Other

iad

X-Github-Request-Id

Other

8A1C:92BEA:C409D:CF4CB:6ABC23A9

X-Proxy-Cache

Other

HIT

X-Served-By

Other

cache-iad-kcgs7200036-IAD

X-Timer

Other

S1791404862.733529,VS0,VE29

alt-svc: clear
date: Wed, 07 Oct 2026 20:27:41 GMT
via: 1.1 varnish, 1.1 google
x-cache: MISS
x-cache-hits: 0
x-fastly-request-id: fdcc11e876234dc6610050fed0bbd62713519f8e
x-github-edge-region: iad
x-github-request-id: 8A1C:92BEA:C409D:CF4CB:6ABC23A9
x-proxy-cache: HIT
x-served-by: cache-iad-kcgs7200036-IAD
x-timer: S1791404862.733529,VS0,VE29

Recommendations

Enable compression (gzip/brotli) to improve performance