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SECURITY SCORE
Certificate Information
Subject
CN=firefox.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
November 13, 2025
Valid Until
February 11, 2026
84 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
9C:CB:C2:51:2C:60:9F:0A:75:7E:E7:1F:1E:A4:A8:04:E2:76:C8:8E:B3:AF:7C:7D:A3:57:0A:A9:4E:9D:8E:51
Alternative Names
Security Configuration
TLS Protocols
TLS 1.0
TLS 1.1
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
Warnings
- • TLS 1.1 is deprecated and should be disabled
- • TLS 1.0 is deprecated and should be disabled
HTTP Security Headers
Status
Strict-Transport-Security
Present
max-age=31536000
Content-Security-Policy
Basic
script-src; connect-src; upgrade-insecure-requests; +10 more
script-src 'self' 'unsafe-eval' 'unsafe-inline' s.ytimg.com tagmanager.google.com www.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube.com; connect-src 'self' basket.mozilla.org https://accounts.firefox.com/ https://basket.mozilla.org o1069899.ingest.sentry.io o1069899.ingest.us.sentry.io o1069899.sentry.io region1.google-analytics.com www.firefox.com www.google-analytics.com www.googletagmanager.com; upgrade-insecure-requests; base-uri 'none'; object-src 'none'; font-src 'self' www.firefox.com; form-action 'self' https://accounts.firefox.com/ https://basket.mozilla.org; img-src 'self' data: www.firefox.com www.google-analytics.com www.googletagmanager.com www.mozilla.org; frame-ancestors 'none'; style-src 'self' www.firefox.com; frame-src 'self' accounts.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube.com; default-src 'self' www.firefox.com; media-src 'self' assets.mozilla.net videos.cdn.mozilla.net www.firefox.com www.mozilla.org
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
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Authorized
(Matches CAA policy)
Authorized CAs
Incident Reporting
mailto:[email protected]
Recommendations
- • You have authorized 6 CAs - consider limiting to only the CAs you actively use
- • Consider adding 'issuewild' records to control wildcard certificate issuance