Audit complete
SEO results for https://www.mozilla.org/
60 SEO checks ran across on-page, technical, security, performance, mobile, and analytics.
A+
93
/100
Overall SEO Score
https://www.mozilla.org/
Excellent — your site is well-optimized.
52Passed
7To Improve
1Must Fix
⚠
Priority Issues
5 to fix firstThese have the highest impact on your score — fix these first for the biggest improvement.
CRITICAL
On-Page SEO
Text to HTML Ratio
Text/HTML ratio: 5.5%. Very low — page is mostly markup. Search engines prefer content-rich pages.
MEDIUM
On-Page SEO
Canonical URL
No tag. Helps prevent duplicate content issues.
Rewrite URLs with our tool →
MEDIUM
On-Page SEO
Readability Proxy
Average sentence length ~29 words. Break up long sentences for readability and mobile scanning.
MEDIUM
Technical SEO
XML Sitemap
No sitemap found at standard locations (/sitemap.xml, /sitemap_index.xml) or declared in robots.txt. Generate and submit one to Google Search Console.
Generate XML Sitemap →
MEDIUM
Performance
External Resources
12 external files. Consider bundling CSS/JS to reduce request count.
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Category Scores
📱 Mobile
2 checks · 100/100
📝 On-Page SEO
18 checks · 86/100
🔒 Security
9 checks · 100/100
📊 Analytics
3 checks · 83/100
🔧 Technical SEO
16 checks · 94/100
⚡ Performance
12 checks · 96/100
Brand & Visual
A live snapshot of how the site looks today.
www.mozilla.org
Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.
Domain Identity & Registration
Public RDAP record for mozilla.org
RDAP request failed: cURL error 28: Operation timed out after 5000 milliseconds with 0 bytes received (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://rdap.org/domain/mozilla.org
Try the dedicated Whois Checker →Network & Hosting
Where the site lives — IPs, hosting provider, geographic location, and full DNS records.
IPv4
35.190.14.201
IPv6
2600:1901::c197:0:0:0:0
Hosting Provider
Google Cloud
CDN / WAF
Fastly
Reverse DNS
201.14.190.35.bc.googleusercontent.com
Location
Kansas City, Missouri, United States
US
ISP
Google LLC
ASN
AS396982 Google LLCDNS Records
A
35.190.14.201
AAAA
2600:1901::c197:0:0:0:0
MX
1 · aspmx.l.google.com5 · alt1.aspmx.l.google.com5 · alt2.aspmx.l.google.com10 · aspmx3.googlemail.com
NS
ns1-240.akam.netns5-65.akam.netns4-64.akam.netns7-66.akam.net
TXT
rz8t7zvjv5frpfbjs3y5n6g5tkw7gt2qgoogle-site-verification=S3M17z96OKfZJ2dq7mYqQDfRWsEVjy3hdxaSyB72YPcanthropic-domain-verification-w5rph5=bZ2V4N0ps4oFSU6yrv4DfD6nAgoogle-site-verification=Brpe3hQpo9FlGIHMtK4ViKL60L0G8VM16nXopwVDoEUyandex-verificationgoogle-site-verification=mU3ta-ZJga-aCNg7IlaRaGYK9sDOMagHRNGVW1FSJGEgoogle-site-verification=Ep3NdzNxaf8Vl48dniNneaqm7JcWUiy3GjKS0wx5zQwgoogle-site-verification=E1vBHtOW-D9IlAj-pbRM-8PrOSiPDT48lrwRlW82yswMS=ms14343235openai-domain-verification=dv-J6NgbJamHFrHSyNqlhElIX5K_zojr3c56nq36tokzhnj9crit28tiqlybzbkzkxj2ws8gvtw6hpssfy7lv9kym88google-site-verification=z68pON7CWSaZu_sBqDQofmDL19OVp3krGEjaDl7cSaUZOOM_verify_lGxIzL49Id7PipUgDgTd9Kv=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.mozilla.com include:_spf.google.com include:spf.fundraiseup.com ~allgoogle-site-verification=Lo_B34AJAe70BQVNF1Fo1zGGJudPmw9bLTnP2C8lV-szoom-domain-verification=ZOOM_verify_671ea7b9c47d4b7b8cc9441f40817e3e
SOA
- Primary:
ns5-65.akam.net - Email:
hostmaster.mozilla.com - Serial:
2024020751
Running check…
Something went wrong.
SSL & Security
TLS certificate, HTTP security headers, and reputation checks.
Certificate Status
Valid
88 days left
Subject (CN)
mozilla.orgIssuer
WR3
Valid From → To
May 29, 2026
→
Aug 27, 2026
Wildcard
No
Self-signed
No
1 Subject Alternative Name
mozilla.org
Running check…
Something went wrong.
Running check…
Something went wrong.
Running check…
Something went wrong.
TLD Variants & Brand Protection
Same brand on other top-level domains. 1 of 8 still available — grab them before a typo-squatter does.
.com
Unknown
mozilla.com
.net
Unknown
mozilla.net
.org
Audited
mozilla.org
.co
Unknown
mozilla.co
.ai
Unknown
mozilla.ai
.app
Unknown
mozilla.app
.dev
Unknown
mozilla.dev
Running check…
Something went wrong.
Site History
When was this site first seen on the public web? One click to scan the Wayback Machine.
Running check…
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Deep Research Shelf
15 follow-up tools — every link stays on-site, pre-filled with this domain.
Detailed Breakdown
Key insights, stats, and content signals — organized by importance.
1Key InsightsHow your page looks & reads
🔍 Google SERP Preview
https://www.mozilla.org/
Internet for people, not profit — Mozilla Global
Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.
Keep titles under 60 chars · descriptions 140–160 chars for best display.
☀ Keyword Cloud
espa (5)
help (2)
menu (3)
site (2)
close (2)
norsk (2)
follow (2)
global (1)
people (1)
profit (2)
sloven (2)
tiktok (2)
bluesky (2)
content (2)
cookies (5)
english (3)
firefox (7)
improve (2)
mozilla (24)
portugu (2)
privacy (2)
addition (1)
internet (1)
products (4)
available (2)
instagram (2)
necessary (1)
additional (3)
experience (2)
foundation (2)
Top body terms sized by frequency. These are what search engines consider your core topic.
2At-a-Glance StatsPrivacy · Presence
✉ Email Privacy
Protected
✓ No plain-text emails found on the page.
📰 Social Profiles
0 linked
No social profile links found. Add them for brand-signal SEO.
📦 Page Weight
8 KB
Total HTML transferred. Aim under 1 MB for fast first paint.
⚡ Response Time
100 ms
Time to first byte from origin server.
3Content & Link SignalsWhat crawlers see on the page
📷 Alt Attribute Issues
0missing
✓ Every image on the page has descriptive alt text. Great for accessibility and image-search SEO.
https://www.mozilla.org/media/protocol/img/logos/firefox/browser/logo.eb1324e44442.svg
https://www.mozilla.org/media/protocol/img/logos/mozilla/vpn/logo.c648f487bfb8.svg
https://www.mozilla.org/media/protocol/img/logos/firefox/monitor/logo.d97e5516f9e6.svg
https://www.mozilla.org/media/protocol/img/logos/firefox/relay/logo.d42a8b52e44c.svg
https://www.mozilla.org/media/img/logos/mdn/mdn-plus-logo.c615b46ca4ce.svg
https://www.mozilla.org/media/img/logos/thunderbird/logo-thunderbird.121e9c0fed45.svg
🔗 In-Page Links
134total
Show link details →
| Anchor | Type | Follow |
|---|---|---|
| Cookie settings | internal | Dofollow |
| (no text) | internal | Dofollow |
| Products | internal | Dofollow |
| Firefox browsers | external | Dofollow |
| Mozilla VPN | internal | Dofollow |
| Mozilla Monitor | internal | Dofollow |
| Firefox Relay | external | Dofollow |
| MDN Plus | external | Dofollow |
| Thunderbird | external | Dofollow |
| Solo | external | Dofollow |
| 0DIN | external | Dofollow |
| Tabstack | external | Dofollow |
| All products | internal | Dofollow |
| About us | internal | Dofollow |
| About Mozilla | internal | Dofollow |
| The Mozilla Manifesto | internal | Dofollow |
| Get Involved | internal | Dofollow |
| Blog | external | Dofollow |
| Mozilla Foundation | external | Dofollow |
| Mozilla.ai | external | Dofollow |
| Mozilla Ventures | external | Dofollow |
| Mozilla Advertising | internal | Dofollow |
| Mozilla Builders | external | Dofollow |
| Mozilla New Products | external | Dofollow |
| Acholi | internal | Dofollow |
| عربي | internal | Dofollow |
| Asturianu | internal | Dofollow |
| Беларуская | internal | Dofollow |
| Български | internal | Dofollow |
| Brezhoneg | internal | Dofollow |
Showing first 30 of 80 links.
4Deep DiveClick to expand any row
📄 Heading Structure 1 H1 ✓ 25 H2 ▾
1
<H1>
25
<H2>
0
<H3>
0
<H4>
0
<H5>
0
<H6>
H1 text: Choose your language or locale to browse Mozilla.org
🌐 Language Declared: en ▾
Declared (html lang)en
All Metrics
- All (60)
- ⚠ Issues (8)
- Mobile
- On-Page SEO
- Security
- Analytics
- Technical SEO
- Performance
Text to HTML Ratio
fail
Text/HTML ratio: 5.5%. Very low — page is mostly markup. Search engines prefer content-rich pages.
Readability Proxy
warn
Average sentence length ~29 words. Break up long sentences for readability and mobile scanning.
XML Sitemap
warn
No sitemap found at standard locations (/sitemap.xml, /sitemap_index.xml) or declared in robots.txt. Generate and submit one to Google Search Console.
Generate XML Sitemap →
External Resources
warn
12 external files. Consider bundling CSS/JS to reduce request count.
Google Analytics
warn
No Google Analytics detected. Without analytics you can't measure traffic or conversions.
W3C HTML Validity
warn
2 W3C HTML error(s). Minor — fix for clean markup.
Structured Data Richness
warn
No schema types detected.
Title Tag
pass
Title present, 48 characters. Good: "Internet for people, not profit — Mozilla Global"
Meta Description
pass
Description present, 134 characters — within the sweet spot.
Meta Keywords
pass
No meta keywords tag present — this is modern best practice. Google ignores this tag since 2009.
H1 Heading
pass
Exactly one H1 on the page: "Choose your language or locale to browse Mozilla.org"
Heading Hierarchy
pass
Logical heading structure: H1:1 H2:25 H3:0 H4:0 H5:0 H6:0.
Image Alt Text
pass
All 12 images have alt text. Excellent for accessibility and SEO.
Internal vs External Links
pass
101 internal, 33 external. Internal link ratio is healthy (75%).
Follow / Nofollow
pass
134 dofollow, 0 nofollow. Link equity flows through dofollow links to linked pages.
Language Attribute
pass
Page declares lang="en".
Character Encoding
pass
UTF-8 charset declared — correct modern default.
DOCTYPE
pass
HTML5 DOCTYPE declared correctly.
Custom 404 Page
pass
Missing URLs return a full 404 response (9,196 bytes). Visitors get proper feedback.
Total Link Count
pass
134 links on page.
Author Meta
pass
No author meta tag. Optional — relevant for blogs and news sites.
Viewport Meta Tag
pass
Responsive viewport declared: width=device-width, initial-scale=1.
Robots Meta Tag
pass
No restrictive robots meta — default is index,follow (good).
robots.txt
pass
robots.txt is present at https://mozilla.org/robots.txt.
Structured Data (Schema)
pass
Structured data present — RDFa detected. Eligible for rich results.
Open Graph Tags
pass
All core Open Graph tags present (title, description, image, url, type).
Twitter Card
pass
Twitter Card configured: type "summary".
AMP
pass
Page is not AMP. This is fine — AMP is optional and declining in Google's ranking signals.
Favicon
pass
Favicon declared: https://www.mozilla.org/media/img/favicons/mozilla/apple-touch-icon.05aa000f6748.png.
Hreflang
pass
79 hreflang alternates declared.
ads.txt
pass
No ads.txt file. This is optional — add one only if you monetize via programmatic display ads.
Server IP / Location
pass
Resolved to 35.190.14.201.
Server Location / Host
pass
Hosting provider: Google Cloud (rDNS:
201.14.190.35.bc.googleusercontent.com).
www / non-www canonical
pass
Apex redirects to www. Single canonical hostname configured correctly.
Domain Age
pass
WHOIS lookup unavailable for this TLD — skipped. Older domains tend to rank slightly better; not an actionable issue.
HTTPS
pass
Page served over HTTPS. Good for SEO, privacy, and user trust.
HSTS
pass
Strict-Transport-Security header present. Forces HTTPS on future visits.
Content Security Policy
pass
Content-Security-Policy header present. Protects against XSS.
X-Frame-Options / CSP frame-ancestors
pass
Clickjacking protection is in place.
Mixed Content
pass
No mixed content — all resources loaded over HTTPS.
Server Header Disclosure
pass
Server header present but version hidden: "granian".
X-Powered-By Disclosure
pass
No X-Powered-By header — good.
security.txt
pass
security.txt file present — RFC 9116 standard for security contact info.
DNSBL / Spam Blocklist
pass
IP is clean on the 5 major DNSBL zones spot-checked (Spamhaus, SpamCop, Barracuda, SORBS, PSBL).
HTTP Status
pass
Server returned HTTP 200.
Response Time
pass
Fast TTFB: 100ms. Well under Google's 800ms target.
Page Size
pass
Page weight: 8 KB. Lightweight — good for mobile users on slow connections.
Compression
pass
Brotli compression active — modern and efficient.
Browser Caching
pass
Static asset https://www.mozilla.org/media/img/favicons/mozilla/apple-touch-icon.05aa000f6748.png caches well: max-age=315360000, public, immutable.
HTTP Version
pass
Serving over HTTP/2 — multiplexed and modern.
Inline <style> Tags
pass
No inline style blocks — clean separation of concerns.
Inline <script> Tags
pass
No inline scripts — excellent for CSP and caching.
Iframes
pass
No iframes — keeps load time predictable.
Image Count
pass
12 images.
Broken Link Check
pass
Crawled 1 internal links — all returned a 2xx/3xx response.
Run full broken-links scan →
Mobile Viewport
pass
Mobile viewport correctly configured.
Flash Content
pass
No Flash content — good, Flash has been discontinued since 2020.
Google Tag Manager
pass
GTM container detected — central management of tracking tags.
Facebook Pixel
pass
No Facebook Pixel detected. Optional — only worth adding if you run Meta ads and need retargeting.
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About the Website SEO Checker
One audit, every signal that matters: meta tags, headings, alt-text coverage, link balance, HTTPS, security headers, page weight, response time, mobile viewport, structured data, social tags, and more. Each finding includes a fix you can act on — and links to the right free tool when one of ours can repair the issue.
Frequently asked questions
How long does a scan take? #
Most sites complete in under 30 seconds. Sites behind a slow origin or large pages may take up to two minutes.
Why does some site fail to audit? #
Some sites use WAFs (Cloudflare, Akamai, Amazon, Sucuri) that block automated requests. We tell you which one when this happens.
Do you store the URLs I scan? #
Yes — scans are saved so you can come back to them. We do not crawl the URL beyond the single page you submit.