telemetry.mozilla.org
Mozilla Data Portal
Last scanned Jul 23, 2026, 12:52 PM
Overall score
Fair
Summary
This website uses Bootstrap hosted on Google Cloud behind Fastly CDN. SEO is fair (60/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.
- United States
- Hosted on Google Cloud
Top issues to fix
11 issues found · 4 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+5 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
7 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Meta tags
- Title
- Mozilla Data Portal
- Description
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Google Cloud
- CDN provider
- Fastly
- IP address
- 34.107.134.242
- ASN
- AS396982 (GOOGLE-CLOUD-PLATFORM - Google LLC, US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT |
|
| NS | — |
| CAA |
|
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- telemetry.mozilla.org
- Valid from
- May 31, 2026
- Valid to
- Aug 29, 2026
- Days until expiry
- 36
- SAN domains
- telemetry.mozilla.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 5 · H3 25
Links
3 internal · 27 external · 0 broken
Images
14 total · 14 missing alt
Scripts / Styles
0 scripts · 3 stylesheets
JS / CSS size
0 B · 58.8 KB
Page size
13.0 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
Scan details
- Requested URL
- https://telemetry.mozilla.org
- Final URL
- https://telemetry.mozilla.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 7 ms
- HTML size
- 13.0 KB
- Redirect chain
- https://telemetry.mozilla.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does telemetry.mozilla.org use?
- telemetry.mozilla.org is built with Bootstrap.
- Is telemetry.mozilla.org secure (HTTPS)?
- Yes. telemetry.mozilla.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 29, 2026.
- Who hosts telemetry.mozilla.org?
- telemetry.mozilla.org is hosted on Google Cloud, behind Fastly CDN.
- What is telemetry.mozilla.org's SEO score?
- telemetry.mozilla.org scored 60/100 for SEO in the latest analysis (fair).
- What is telemetry.mozilla.org's overall website score?
- telemetry.mozilla.org has an overall SiteGraph score of 73/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card