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mozilla-japan.org

https://mozilla-japan.org· First analyzed 10 May 2026· Updated 10 May 2026
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mozilla-japan.org
Desktop screenshot of mozilla-japan.org
Mobile screenshot of mozilla-japan.org
Mobile

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Hosting Provider

Google Cloud Platform
cloud.google.com

IP Address

35.190.14.201

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Kansas City, United States

ASN

AS396982

Organization

Google Cloud

Server

granian

CDN

Fastly

Nameservers

ns1-240.akam.net.ns4-64.akam.net.ns7-66.akam.net.ns5-65.akam.net.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
848 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
327 KB
44 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Google Cloud Platform
CDN
Fastly

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

SEO Analysis

B71/100
21
6
1
Meta Tags8/15
Content11/12
Headings8/8
Technical17/25
E-E-A-T3/7
Images3/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
M
mozilla-japan.orgmozilla-japan.org

Mozilla — 利益ではなく、ユーザーのためのインターネット

Mozilla は、インターネットを利用者の手に戻すために活動しています。

Title Length32 chars

Recommended: 50-60 chars (~194px / 580px)

Description Length37 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (18/23) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

3 rules

Allows all crawlers

Local SEO

Local Search Readiness

14/100
Poor
4 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

D42/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
11/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User
data-nosnippet

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:7%
Words:806
Token eff.:Optimal
Sections/1K:53.3
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary12w
Descriptive Headingsavg 1.7w
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
Upgrade to view recommendations

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
80/100
13
Passed
3
Critical
1
Warnings
Images & Alt Text
18/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
12/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
84/100
A+
33 mg
CO₂e / view
327.2 KB
Page Weight
90%
Cleaner Than
New Visitor
38 mg
vs
Returning (cached)
19 mg
Annual (10K/mo)
4.0 kg
Emission Segments
Data Center
2 mg
Network
10 mg
Device
22 mg
Resource Breakdown
JavaScript
44.6 KB
Images
127.2 KB
CSS
134.5 KB
HTML
20.9 KB
Green Hosting Verified
Google Cloud
GWF Verified
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

84%Very Good
Interactive

HTTPS

No WAF

73d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

24.04.2026

Valid Until

23.07.2026

Subject Alternative Names (1)

www.mozilla.org

SHA-256 Fingerprint

54:01:75:7A:74:CB:98:06:0A:FE:E8:78:36:70:45:7B:A6:D8:75:08...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
age
0
cache-control
🟡 600s(max-age=600)
content-encoding
⚡ Brotli(br)
content-language
ja
content-length
21062
Good Warning Issue

Email Infrastructure

Google Workspace

Score

95

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt3.aspmx.l.google.com
alt1.aspmx.l.google.com
alt4.aspmx.l.google.com
alt2.aspmx.l.google.com

+1 more

Domain Information

mozilla-japan.org

Domain Age
22y 1m

Created

30.03.2004

Expires

30.03.2028

Last Updated

03.03.2026

Registrar

MarkMonitor Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
B
71/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Mozilla Headline + Mozilla Text

WCAG Partial
68/100
Readability
/30
16/30

16px · LH 1.25

Hierarchy
/20
20/20

8x ratio · ✓ H1→H6

WCAG
/25
14/25

1:1 min contrast

Performance
/25
18/25

2 fonts · 4 req

Heading Font

Mozilla Headline

Sans128px

Body Font

Mozilla Text

Sans16px

Contrast Ratio

1:1

11 issues

Reading Comfort

~42 CPL

Narrow lines
128px
h1
80px
h2
48px
h3
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Tight line spacing (1.25). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 8.0x larger than body text.

Buy on MyFontsFlesch 0

Color Palette

6 unique colors
18.1:1 AAA Dark
#161616
Text· 57.1%
#ffffff
Background· 34.599999999999994%
#69c57d
Primary· 2.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

17 Resources

11
Scripts
6
Styles
0
Async
0
Defer

Top Script Sources

mozilla.org(11)

Website Identity

mozilla-japan.org

22 years old
Location detected: 🇺🇸 United Statesvia ip
MarkMonitor Inc.📧 Google Workspaceja

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Last analyzed: 10 May 2026 at 09:07

Historical Analysis & Change Tracking