# BeaverCheck Audit Report — https://www.mozilla.org

**Date:** April 7, 2026  
**URL:** https://www.mozilla.org  
**Overall Grade:** B (80/100)  
**Report:** https://beavercheck.com/results/fe612751-44e8-9d4e-b0a5-3a2dbf0b8e22

## Top Findings

1. **[CRITICAL]** 'unsafe-eval' found in script source — Security > Content Security Policy
2. **[CRITICAL]** 'unsafe-inline' found in script source — Security > Content Security Policy
3. **[CRITICAL]** 9 image-only link(s) without alt text — Accessibility > Link & Button Quality
4. **[WARNING]** Cross-Origin-Embedder-Policy header is missing — Security > Security Headers
5. **[WARNING]** External script from transcend-cdn.com lacks integrity attribute — Security > Subresource Integrity

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 73 |
| Accessibility | 100 |
| Best Practices | 96 |
| SEO | 100 |

---

## Security

### Security Headers (B — 80/100)

*7 of 10 headers properly configured*

- **[WARNING]** HSTS is missing includeSubDomains — Without includeSubDomains, subdomains can still be accessed over HTTP.
- **[PASS]** X-Content-Type-Options is properly configured
- **[PASS]** X-Frame-Options is properly configured
- **[PASS]** Referrer-Policy is properly configured
- **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
- **[PASS]** Content-Security-Policy is present
- **[PASS]** Cross-Origin-Opener-Policy is properly configured
- **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
- **[PASS]** X-Powered-By header is not present
- **[PASS]** Server header is present without version info

### Content Security Policy (C — 60/100)

*7 of 11 CSP checks passed*

- **[INFO]** Raw CSP policy
- **[PASS]** default-src directive is set
- **[CRITICAL]** 'unsafe-inline' found in script source — 'unsafe-inline' allows inline <script> tags, defeating CSP against XSS. Remove it and use nonces or hashes instead.
- **[CRITICAL]** 'unsafe-eval' found in script source — 'unsafe-eval' allows eval() and similar functions, enabling code injection. Remove it.
- **[PASS]** No wildcard in script source
- **[PASS]** object-src is set to 'none'
- **[PASS]** base-uri is properly restricted
- **[PASS]** frame-ancestors directive is set
- **[PASS]** form-action directive is set
- **[PASS]** upgrade-insecure-requests is enabled
- **[INFO]** Content-Security-Policy-Report-Only is also set — A report-only policy is active alongside the enforcing policy for monitoring.

### TLS & Certificates (A+ — 100/100)

*TLS 1.3, 7 checks passed*

- **[PASS]** TLS 1.3 is used
- **[PASS]** Strong cipher suite is used
- **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance.
- **[PASS]** Certificate is valid (expires in 46 days)
- **[PASS]** Certificate chain has 2 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 1 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A+ — 100/100)

*No cookies set — no cookie security risks*

- **[PASS]** No cookies set — no cookie security risks

---

## Advanced Security

### Subresource Integrity (F — 20/100)

*0 of 3 external resources have SRI*

- **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from transcend-cdn.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.

### JS Library Vulnerabilities (A+ — 100/100)

*No known vulnerabilities*

- **[PASS]** No known JavaScript library vulnerabilities detected

### Information Leakage (A+ — 100/100)

*No exposures*

- **[PASS]** security.txt is present — good practice
- **[PASS]** No sensitive files exposed

### Email Security (F — 30/100)

*No DMARC*

- **[WARNING]** No DMARC record found — Without DMARC, email receivers have no policy for handling authentication failures.

### Permissions-Policy (D — 40/100)

*No header set*

- **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

### CORS Configuration (B — 80/100)

*No CORS headers*

- **[PASS]** No CORS headers present — secure default

---

## Performance

### Page Weight Budget (A — 93/100)

*772 KB transferred, 52 requests*

- **[PASS]** Page weighs 2.0 MB (772 KB transferred)
- **[INFO]** 52 HTTP requests
- **[INFO]** Estimated 0.16 g CO2 per page load

### Third-Party Impact (B — 70/100)

*60% third-party, 0 ms blocking*

- **[WARNING]** Third-party code accounts for 60% of page weight (459.5 KiB of 771.9 KiB)
- **[PASS]** Third-party blocking time is low (0 ms)

### Text Compression (A+ — 100/100)

*All text resources are compressed*

- **[PASS]** All text resources are compressed

### Image Optimization (B — 75/100)

*22 images, 0 KB saveable*

- **[PASS]** All images are well-optimized

### JS Execution Cost (D — 40/100)

*2523ms total JS execution*

- **[WARNING]** Unattributable: 545ms CPU time
- **[WARNING]** https://www.googletagmanager.com/gtag/js?id=G-MQ77...: 495ms CPU time
- **[WARNING]** https://www.mozilla.org/en-US/: 373ms CPU time
- **[WARNING]** https://transcend-cdn.com/cm/d556c3a1-e57c-4bdf-a4...: 338ms CPU time
- **[WARNING]** https://www.mozilla.org/media/js/newsletter.988c40...: 274ms CPU time
- **[WARNING]** Third-party scripts: 1784ms (71% of total)

### Font Loading (A+ — 100/100)

*4 fonts (107 KB)*

- **[INFO]** 4 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (C — 60/100)

*15 scripts, 203 KB unused*

- **[WARNING]** https://www.googletagmanager.com/gtag/js?id=G-MQ77...: 70 KB unused (40%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.googletagmanager.com/gtm.js?id=GTM-MW3...: 60 KB unused (48%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://transcend-cdn.com/cm/d556c3a1-e57c-4bdf-a4...: 45 KB unused (46%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://transcend-cdn.com/cm/d556c3a1-e57c-4bdf-a4...: 28 KB unused (54%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 203 KB

### Resource Caching (A+ — 100/100)

*All resources properly cached*

- **[PASS]** No caching issues found

### Critical Rendering Path (A+ — 100/100)

*No render-blocking resources*

- **[PASS]** No render-blocking resources detected

### Resource Hints (A+ — 100/100)

*No optimization needed*

- **[PASS]** No resource hint issues

### Render-Blocking Resources (A+ — 100/100)

*No render-blocking resources detected*

- **[PASS]** No render-blocking resources detected in <head>

### Third-Party Resources (A+ — 100/100)

*No third-party resources detected*


---

## Content Quality

### Links (B — 85/100)

*200 links checked, 197 healthy, 3 broken*

- **[WARNING]** 197 of 200 links are healthy
- **[CRITICAL]** Broken link: https://newproducts.mozilla.org/?utm_source=www.mozilla.o... — Found in <a href>. Returns HTTP 401.
- **[CRITICAL]** Broken link: https://www.instagram.com/mozilla/ — Found in <a href>. Returns HTTP 429.
- **[CRITICAL]** Broken link: https://www.instagram.com/firefox/ — Found in <a href>. Returns HTTP 429.

### Mixed Content (A+ — 100/100)

*No mixed content detected — all resources use HTTPS.*

- **[PASS]** No mixed content detected — all resources use HTTPS

### Open Graph (A+ — 100/100)

*Open Graph tags are well configured for social sharing.*


### Structured Data (C — 40/100)

*No structured data (JSON-LD) found.*

- **[INFO]** No structured data (JSON-LD) found — Adding structured data helps search engines understand your content and can enable rich results.

---

## Infrastructure

### DNS Records (B — 80/100)

*4 A records, 16 ms lookup*

- **[PASS]** Resolves to 4 IPv4 address(es)
- **[PASS]** Has 4 IPv6 (AAAA) record(s)
- **[WARNING]** CNAME record at zone apex — A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
- **[INFO]** No NS records found
- **[INFO]** No MX records — email not configured via DNS
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[INFO]** No SPF record found in TXT records — SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
- **[PASS]** DNS resolution time: 16 ms

### Redirect Chain (A+ — 100/100)

*No redirects — direct access*

- **[PASS]** No redirects — direct access

### IPv6 Readiness (A+ — 100/100)

*IPv6 reachable (1 ms)*

- **[PASS]** IPv6 is configured and reachable at 2a04:4e42::787, 2a04:4e42:600::787, 2a04:4e42:200::787, 2a04:4e42:400::787

### Crawlability (B — 80/100)

*robots.txt present, no sitemap*

- **[PASS]** robots.txt is present
- **[INFO]** No sitemap.xml found — A sitemap helps search engines discover and index your pages more efficiently.
- **[INFO]** robots.txt does not reference a sitemap — Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

### URL Variants (A+ — 100/100)

*www/non-www, trailing slash, HTTP→HTTPS*

- **[PASS]** www/non-www redirect configured correctly (preferred: www)
- **[PASS]** HTTP correctly 301-redirects to HTTPS

### Domain Intelligence (A+ — 100/100)

*mozilla.org — via MarkMonitor Inc., 28 years, 7 months old*

- **[PASS]** Domain registered until Jan 23, 2027 (9 months remaining)
- **[INFO]** DNSSEC is not enabled — DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
- **[PASS]** Registrar: MarkMonitor Inc.

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (B — 80/100)

*No consent signals detected*

- **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required.
- **[INFO]** No terms of service link detected
- **[INFO]** No cookie consent banner detected
- **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance.

### Language & i18n (A — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (A+ — 100/100)

*Viewport properly configured*

- **[PASS]** Viewport meta tag is present
- **[PASS]** width=device-width is set
- **[PASS]** User zooming is allowed

### Third-Party Trackers (C — 55/100)

*2 trackers detected*

- **[INFO]** 2 third-party trackers detected — Found 1 analytics, 0 advertising, 0 marketing, 1 tag manager trackers.
- **[WARNING]** Trackers detected but no cookie policy found — This page loads 2 trackers but no cookie policy was detected. GDPR requires disclosure when using tracking cookies.
- **[WARNING]** Trackers detected but no privacy policy found — Most data protection regulations require a privacy policy when collecting user data via trackers.

---

## Legal

### Legal Page Ecosystem (D — 45/100)

*2 of 7 expected legal pages detected*

- **[WARNING]** Privacy Policy not detected — No link matching common Privacy Policy URL patterns or link text was found. Most websites are expected to have a Privacy Policy, especially those collecting user data.
- **[PASS]** Terms of Service detected — Found at /en-US/about/legal/, linked from footer.
- **[PASS]** Cookie Policy detected — Found at /en-US/privacy/websites/cookie-settings/, linked from footer.
- **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data.
- **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data.
- **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data.
- **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data.

### Copyright Notice (A+ — 100/100)

*©1998–2026 by individual mozilla*

- **[PASS]** Copyright notice is up to date — Copyright notice is up to date: ©1998–2026 by individual mozilla
- **[PASS]** Copyright holder: by individual mozilla

### Regulatory Indicators

*2 regulatory indicator(s) detected*

- **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments.
- **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.
- **[INFO]** HIPAA indicators detected (weak confidence) — Indicators suggesting HIPAA may be relevant: Text mentions: phi. Health Insurance Portability and Accountability Act — protects sensitive patient health information.

### Third-Party Data Sharing

*2 third-party service(s) detected*

- **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows.
- **[INFO]** 2 third-party services across 2 categories — 2 third-party services detected across 2 categories: Analytics (1), Tag Management (1). Each of these services receives some user data from your site visitors.
- **[INFO]** Google Analytics (Analytics) — Detected via script URL. Typically collects: Page views, User behavior, Demographics, Device info, IP address. Privacy policy: https://policies.google.com/privacy. Data Processing Agreement available.
- **[INFO]** Google Tag Manager (Tag Management) — Detected via script URL. Typically collects: Orchestrates other tracking scripts, Page views. Privacy policy: https://policies.google.com/privacy. Data Processing Agreement available.

### Compliance Badges (C — 55/100)

*0 compliance badge(s) detected*

- **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges.

---

## Availability

### CDN & Delivery (A+ — 100/100)

*Fastly (MISS, HIT)*

- **[PASS]** Site is served via Fastly CDN
- **[PASS]** CDN cache status: MISS, HIT

### HTTP Caching (A+ — 95/100)

*max-age=600 (10 minutes)*

- **[PASS]** Cache-Control header is set
- **[PASS]** Effective TTL: 10 minutes (max-age=600)
- **[PASS]** ETag present — enables conditional (304) responses

### Transport Security (A — 90/100)

*HTTP/3, HSTS, and TLS version analysis*

- **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
- **[PASS]** HSTS enabled (base policy)
- **[INFO]** HSTS missing includeSubDomains — Without includeSubDomains, HSTS only protects the exact domain.
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (A — 85/100)

*9 landmarks*

- **[PASS]** <main> landmark present
- **[PASS]** 1 <nav> landmark(s) found
- **[WARNING]** Skip navigation link is missing (WCAG 2.4.1) — Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

### Heading Hierarchy (A+ — 95/100)

*44 headings*

- **[PASS]** Single H1 present
- **[WARNING]** 1 empty heading(s) — Empty headings appear in the document outline but provide no information.

### Alt Text Quality (A+ — 100/100)

*All 23 images OK*

- **[PASS]** 18 decorative image(s) correctly marked
- **[PASS]** 5 image(s) with good alt text

### Form Accessibility (A+ — 100/100)

*All 6 controls labeled*

- **[PASS]** 6 control(s) properly labeled

### Link & Button Quality (C — 68/100)

*88 links, 7 buttons — all OK*

- **[CRITICAL]** 9 image-only link(s) without alt text
- **[WARNING]** 8 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.
- **[PASS]** 71 link(s) with descriptive text

---

## UX

### 404 Error Page (B — 70/100)

*HTTP 404, custom page*

- **[PASS]** Correct 404 status code returned
- **[PASS]** Custom styled 404 page
- **[PASS]** Navigation links present on 404 page

### Favicon & Branding (B — 70/100)

*4 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[PASS]** HTML icon links detected
- **[PASS]** Apple touch icon present
- **[PASS]** Multiple icon sizes detected

### Web Manifest (D — 40/100)

*Not found*

- **[INFO]** No web manifest found — No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

### Dark Mode Support (D — 40/100)

*No dark mode signals*

- **[INFO]** No dark mode signals detected — Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
- **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan.

### Print Stylesheet (D — 40/100)

*No print styles*

- **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

### Navigation UX (F — 15/100)

*No navigation patterns*

- **[PASS]** 1 navigation landmark(s) detected
- **[INFO]** No breadcrumbs, search, or skip link detected — These navigation aids help users orient themselves and find content efficiently, especially on large sites.

---

## SEO

### Canonical URL (A — 90/100)

*Minor issues*

- **[PASS]** Canonical tag present
- **[WARNING]** Canonical does not match final URL (https://www.mozilla.org)
- **[PASS]** Canonical target returns 200

### Meta Tags (A — 85/100)

*Title: 7 chars*

- **[PASS]** Page title is set
- **[WARNING]** Title is only 7 characters — consider expanding
- **[INFO]** Title and H1 have very different wording — Alignment helps users confirm they've reached the right page.

### Content Depth (A+ — 100/100)

*1569 words, Very Difficult*

- **[PASS]** Page has 1569 words — good depth for search engines
- **[INFO]** Reading level: Very Difficult (grade 18)

### Internal Links (A+ — 100/100)

*29 internal, 59 external*

- **[PASS]** 29 internal links (33%)
- **[PASS]** 100% of links use descriptive anchor text
- **[INFO]** 29 internal / 59 external links

### Image SEO (A+ — 100/100)

*23 images, 23 descriptive filenames*

- **[PASS]** All images have descriptive filenames

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (A+ — 100/100)

*0.18g CO2 per view*

- **[PASS]** 0.18g CO2 per page view — This page transfers 0.8 MB, producing an estimated 0.18g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.04g, end-user device 0.14g.
- **[INFO]** At 10,000 monthly views: 21.4 kg CO2/year — With 10,000 page views per month, this page would generate approximately 21.4 kg of CO2 annually — equivalent to charging 2676 smartphones.
- **[PASS]** Green hosting reduces data center emissions

### Green Hosting (A+ — 100/100)

*Green (both)*

- **[PASS]** Both hosting and CDN use renewable energy
- **[INFO]** Google Cloud: Carbon-neutral since 2007, 100% renewable energy matched since 2017
- **[INFO]** Fastly: 100% renewable energy for edge network
- **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.

### Repeat Visit Weight (A+ — 100/100)

*97% cached*

- **[PASS]** 97% reduction on repeat visits — Returning visitors download only 21 KB (vs 771 KB first visit). 51 of 52 resources are served from browser cache, saving 0.17g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.00g CO2 (first visit: 0.18g)

### Carbon Budget (A+ — 100/100)

*10th percentile*

- **[PASS]** 0.18g CO2 — below the sustainability target of 0.50g — Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
- **[INFO]** Estimated 10th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (C — 60/100)

*74% efficient*

- **[WARNING]** Transfer efficiency: 74% — An estimated 202 KB (26%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 202 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.

---

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/fe612751-44e8-9d4e-b0a5-3a2dbf0b8e22*