What technology does addons.mozilla.org use?

We did not detect any specific technologies for addons.mozilla.org in the latest scan.

Is addons.mozilla.org secure (HTTPS)?

Yes. addons.mozilla.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 26, 2026.

Who hosts addons.mozilla.org?

Hosting provider information for addons.mozilla.org is not available yet.

What is addons.mozilla.org's SEO score?

addons.mozilla.org scored 75/100 for SEO in the latest analysis (fair).

What is addons.mozilla.org's overall website score?

addons.mozilla.org has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.

Has addons.mozilla.org's score changed over time?

addons.mozilla.org's overall score has improved by 1 point (from 92 to 93) since Jul 23, 2026.

addons.mozilla.org

Add-ons for Firefox (en-US)

Last scanned Jul 30, 2026, 7:00 PM · 10 views

Overall score

Excellent

Summary

Download Firefox extensions and themes. SEO is good (75/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). 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.

Top issues to fix

5 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.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

4 issue(s) found

100

Performance

810 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+1 overall since Jul 23, 2026

Overall: 93
SEO: 75
Security: 100
Performance: 100
Accessibility: 100

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.

Instagram YouTube YouTube

Contact

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

Email: activist-balanced-colorway@mozilla.org dev@ajay.app dreamer-balanced-colorway@mozilla.org extension@one-tab.com firefox@powerthesaurus.org mark@liebs.ca senselius@gmail.com sienori.firefox+tsm@gmail.com sponsorBlocker@ajay.app visionary-balanced-colorway@mozilla.org

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

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: Fastly
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: addons.mozilla.org
Valid from: Jul 28, 2026
Valid to: Oct 26, 2026
Days until expiry: 87
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 52

Links

52 internal · 29 external · 20 broken

Images

30 total · 0 missing alt

Scripts / Styles

3 scripts · 1 stylesheets

JS / CSS size

192 KB · 0 B

Page size

259 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Meta description longer than 160 characters
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

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: 805 ms
HTML size: 259 KB
Redirect chain: https://addons.mozilla.org → https://addons.mozilla.org/en-US/firefox/

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Frequently asked questions

What technology does addons.mozilla.org use?: We did not detect any specific technologies for addons.mozilla.org in the latest scan.
Is addons.mozilla.org secure (HTTPS)?: Yes. addons.mozilla.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 26, 2026.
Who hosts addons.mozilla.org?: Hosting provider information for addons.mozilla.org is not available yet.
What is addons.mozilla.org's SEO score?: addons.mozilla.org scored 75/100 for SEO in the latest analysis (fair).
What is addons.mozilla.org's overall website score?: addons.mozilla.org has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.
Has addons.mozilla.org's score changed over time?: addons.mozilla.org's overall score has improved by 1 point (from 92 to 93) since Jul 23, 2026.