Skip to main content
SGSiteGraph

addons.mozilla.org

Add-ons for Firefox (en-US)

Last scanned Jul 23, 2026, 12:53 PM

92

Overall score

Excellent

Summary

Download Firefox extensions and themes. This website uses Google Analytics hosted on Fastly behind Fastly CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance good (85/100). Top issue: Meta description longer than 160 characters.

Download Firefox extensions and themes. They’re like apps for your browser. They can block annoying ads, protect passwords, change browser appearance, and more.

United States
Hosted on Fastly

Top issues to fix

2 issues found

  • Meta description longer than 160 characters

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

85

SEO

2 issue(s) found

85

Performance

658 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

Download Firefox extensions and themes. They’re like apps for your browser. They can block annoying ads, protect passwords, change browser appearance, and more.

InstagramYouTubeYouTube

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
Add-ons for Firefox (en-US)
Description
Download Firefox extensions and themes. They’re like apps for your browser. They can block annoying ads, protect passwords, change browser appearance, and more.
Canonical
https://addons.mozilla.org/en-US/firefox/
Language
en-US
Charset
utf-8
Viewport
width=device-width, initial-scale=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Add-ons for Firefox (en-US)
og:description
Download Firefox extensions and themes. They’re like apps for your browser. They can block annoying ads, protect passwords, change browser appearance, and more.
og:type
website
og:url
https://addons.mozilla.org/en-US/firefox/

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Google Analytics

Hosting & CDN

Hosting provider
Fastly
CDN provider
Fastly
IP address
151.101.65.91
ASN
AS54113 (FASTLY - Fastly, Inc., US)

DNS records

TypeValue
A
  • 151.101.65.91
  • 151.101.193.91
  • 151.101.129.91
  • 151.101.1.91
AAAA
  • 2a04:4e42::347
  • 2a04:4e42:400::347
  • 2a04:4e42:600::347
  • 2a04:4e42:200::347
MX
  • mx.socketlabs.com
TXT—
NS
  • ns-967.awsdns-56.net
  • ns-144.awsdns-18.com
  • ns-1696.awsdns-20.co.uk
  • ns-1140.awsdns-14.org
CAA—
CNAME—
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
addons.mozilla.org
Valid from
May 29, 2026
Valid to
Aug 27, 2026
Days until expiry
35
SAN domains
addons.mozilla.org, services.addons.mozilla.org

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyEnabled
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 29 · H3 48

Links

51 internal · 29 external · 0 broken

Images

30 total · 0 missing alt

Scripts / Styles

5 scripts · 1 stylesheets

JS / CSS size

1.4 MB · 216 KB

Page size

261 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
260
sitemap.xml
Found
URLs in sitemap
-1

SEO issues

  • Meta description longer than 160 characters
  • No structured data (JSON-LD) found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://addons.mozilla.org
Final URL
https://addons.mozilla.org/en-US/firefox/
HTTP status
200
HTTP version
HTTP/2
Response time
653 ms
HTML size
261 KB
Redirect chain
https://addons.mozilla.org → https://addons.mozilla.org/en-US/firefox/

See something wrong on this report? Request a correction

Related websites

Same technology stack

quago.io

Home - Quago

100
wordpressnginxgoogle-analytics

exxonmobil.com

Exxon Mobil Corporation | ExxonMobil

100
google-analyticsmeta-pixelgoogle-ads
AKAMAI-AS - Akamai Technologies, Inc., US

pq.com

PQ Corp. – Global Silicates and Silicas Provider

100
wordpressgoogle-analyticsjquery
Cloudflare· Cloudflare

flippingbook.com

FlippingBook | Flipbook Maker for Digital Publishing

100
nginxgoogle-analyticsgoogle-ads
AWS

laaa.com

Los Angeles Multifamily Broker | LA Apartment Advisors

100
nextjsgoogle-analytics
AWS· Vercel

sunoco.com

Fuel & Save with Sunoco Gas, Credit Cards & Rewards | Sunoco

100
google-analyticsjquerybootstrap
F5 - F5 Networks SARL, FR

Same hosting provider

hallensteins.co.nz

Hallensteins | Menswear NZ

100
nginxjqueryphp
Fastly· Fastly

mafc.com

Your Agricultural Lending Company | Horizon Farm Credit

99
nginxdrupaljquery
Fastly· Fastly

adroll.com

Multichannel Advertising & Account-Based Marketing Platform | AdRoll

99
nginxmeta-pixel
Fastly· Fastly

firefox.com

Firefox: The fast, private browser that keeps you safe — Firefox.com

99
google-analytics
Fastly· Fastly

glassons.co.nz

Home | Glassons

98
nginxgoogle-analyticsphp
Fastly· Fastly

datarobot.com

DataRobot | Unified Agent Workforce Platform for Enterprise

98
wordpressnginxgoogle-analytics
Fastly· Fastly

Frequently asked questions

What technology does addons.mozilla.org use?
addons.mozilla.org is built with Google Analytics.
Is addons.mozilla.org secure (HTTPS)?
Yes. addons.mozilla.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 27, 2026.
Who hosts addons.mozilla.org?
addons.mozilla.org is hosted on Fastly, behind Fastly CDN.
What is addons.mozilla.org's SEO score?
addons.mozilla.org scored 85/100 for SEO in the latest analysis (great).
What is addons.mozilla.org's overall website score?
addons.mozilla.org has an overall SiteGraph score of 92/100, combining SEO, performance, security, and accessibility.