mozilla.org
Measuring…
mozilla.org
Scanned:
94/ 100
Score by axis
- Security100
- Performance100
- SEO69
- Reputation100
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Changes since your last scan
Previous scan:
We checked different things this time, so we can't compare the scores.
Fix what matters first
- 1Image alt text+3
Most images lack alt text — add descriptive alt attributes.
- 2Canonical URL+1
Add <link rel="canonical"> to avoid duplicate-content issues.
- 3XML sitemap+1
Publish a sitemap.xml and reference it from robots.txt.
- 4Structured data (JSON-LD)+1
Add schema.org to enable rich results.
Recommendations are ranked by their impact on your score.
All checks
Security
100/ 100- Pass
HTTPS & HTTP→HTTPS redirect
HTTPS available; HTTP redirects to HTTPS
- Pass
TLS certificate validity
Valid; expires in 74 days
expires 2026-09-21 · YR1 - Pass
HSTS (Strict-Transport-Security)
Present
max-age=31536000 - Pass
Content-Security-Policy
Present
object-src 'none'; style-src 'self' 'unsafe-inline' cdn.transcend.io transcend-c… - Pass
Core security headers
All present
- Pass
Mixed content (HTTP on HTTPS)
No insecure (http://) subresources
- Pass
SPF email anti-spoofing
record present
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.mozilla.com include:_spf.google.com include:spf.fundraiseup.com ~all - Pass
DMARC email anti-spoofing
record present
v=DMARC1; p=reject; pct=100; adkim=r; aspf=r; rua=mailto:dmarc_agg@vali.email,mailto:dmarc@mozilla.com - N/A
Vulnerable front-end libraries
No recognizable front-end library versions detected
Performance
100/ 100- Pass
Time to First Byte
3 ms
- Pass
Text compression
Enabled (br)
- Pass
HTTP/2 or HTTP/3
HTTP/2.0
- Pass
Cache-Control
max-age=600
- Pass
Core Web Vitals (PageSpeed)
perf 93/100, 2070ms, 0.00 (field)
SEO
69/ 100- Pass
Page title
Internet for people, not profit — Mozilla Global
- Pass
Meta description
134 characters
Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online. - Warn
Canonical URL
No canonical link
Add <link rel="canonical"> to avoid duplicate-content issues.
- Pass
- Warn
XML sitemap
No sitemap found
Publish a sitemap.xml and reference it from robots.txt.
- Pass
Single H1
1 H1 tag(s)
Choose your language or locale to browse Mozilla.org - Fail
Image alt text
2/12 images have alt (17%)
Most images lack alt text — add descriptive alt attributes.
- Warn
Structured data (JSON-LD)
No structured data
Add schema.org to enable rich results.
Infrastructure
100/ 100- N/A
CMS detection
No CMS fingerprint detected
- N/A
CMS known vulnerabilities
No CMS detected
- Pass
Web server
granian
- Pass
CDN detection
Fastly
- Pass
TLS version
TLS 1.3
- Pass
IPv6 (AAAA record)
AAAA record present
2a04:4e42:200::787
Reputation
100/ 100- Pass
Domain blacklist status
Not on major blocklists
checked: Spamhaus DBL, SURBL - Pass
Domain age
Registered 1998-01-24 (~346 months)
- Pass
Domain expiry
Expires in 198 days
2027-01-23
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