Website reputation report

extensionworkshop.com

Last checked 3 hours ago · Point-in-time assessment

76/100Technical Safety ScoreIndependent technical assessment, not a visitor rating
Would you recommend this page? No community votes yet 0/0 Your vote is for this page in this report only—not the entire website. No account required · One vote per browser.
Captured homepage of extensionworkshop.com in the current scan
Website screenshot from the current report

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● Evidence is limited

What is this website?

Learn the fundamentals of the WebExtensions API. Explore the power of the browser extensions APIs for building robust and feature-rich Firefox add-ons.

No listed local patterns observedHomepage-only analysis is not a malware clearance. Read the scope and findings below.

76/100Safety Score
75%Evidence Confidence
Trust Radar evidence profile Eight evidence dimensions from zero to one hundred. Exact values surround the chart. Threat Intelligence55 Domain History86 Infrastructure80 Website Security95 Security Hygiene80 Transparency53 Reputation50 Operational Stability96
Trust RadarEight observed factors. Select one to inspect its evidence.

How to read this report

Safety Score evaluates observed signals. Evidence Confidence measures how complete, direct, fresh, and consistent those signals are.

No automated scan can guarantee that a website is safe.

Current report context

What changed since the last scan

  • No earlier report to compare
What this scan could verify · 6 observed, 0 unavailable
DNS observed
Registration lookup observed
Network observed
TLS observed
Website response observed
Website content observed

Unavailable and unperformed checks are not clean results. The detailed evidence below remains the source for each conclusion.

Report an inaccuracy in this report →

Independent evidence brief

What we observed about extensionworkshop.com

Updated Oct 12, 2026

The latest scan examined 10 public pages on extensionworkshop.com. Website descriptions below come from the site itself. Registration, connection and threat findings were checked separately.

Purpose and visible content

On its About page, the site says: Learn the fundamentals of the WebExtensions API. Explore the power of the browser extensions APIs for building robust and feature-rich Firefox add-ons.

Registrar and domain history

Registered on Dec 21, 2018. Registrar: MarkMonitor Inc..

Recorded expiry date: Dec 21, 2026. Registry data can change.

Connection and hosting evidence

The checked homepage returned HTTP 200.

A valid TLS certificate was observed, expiring Nov 20, 2026.

Threat checks and score context

External malware-provider coverage was unavailable. The report does not treat this missing check as a clean result.

Safety Score: 76/100. Evidence Confidence: 75%. These measure different things.

Community reviews of extensionworkshop.com

No approved reviews yet ☆☆☆☆☆

Visitor experiences are separate from the independent technical Safety Score.

Visitor opinions remain separate from the technical Safety Score.

Public content profile

Pages reviewed on extensionworkshop.com

10 of up to 10 pages

We sampled public pages from this website to understand its subject and contact paths. The titles and short descriptions below come from the website itself. They are not endorsements or independent safety findings.

Firefox Extension Workshop | Get help creating & publishing Firefox extensions.Get help creating & publishing Firefox extensions. About the WebExtensions API | Firefox Extension WorkshopLearn the fundamentals of the WebExtensions API. Explore the power of the browser extensions APIs for building robust and feature-rich Firefox add-ons. Build a secure extension | Firefox Extension WorkshopLearn best practices to build a secure Firefox extension. Protect your users and your add-on by implementing key security and privacy measures. Testing persistent and restart features | Firefox Extension WorkshopLearn to test persistent features in your Firefox extension, ensuring data integrity across browser restarts and session changes. Add-on Policies | Firefox Extension WorkshopThe complete guide to Firefox add-on policies. Ensure your extension complies with all the requirements for security, functionality, and user data. Browser compatibility | Firefox Extension WorkshopCheck browser compatibility for WebExtension APIs. Ensure your code works across Firefox and other browsers with these compatibility tables. Community | Firefox Extension WorkshopGet help creating & publishing Firefox extensions. Extension Basics | Firefox Extension WorkshopLearn the basics of Firefox extension development. Explore the anatomy of a browser add-on, WebExtensions API concepts, and the manifest.json file. Create extensions for Firefox and Firefox for Android | Firefox Extension WorkshopDeep dive into developing Firefox extensions. Get guides on Manifest V3, cross-browser porting, security best practices, and debugging tools for your add-ons. Unique Firefox Capabilities | Firefox Extension WorkshopUse unique Firefox WebExtension APIs and features not available elsewhere. Discover powerful tools to enhance your browser add-ons.

Public page evidence

Topics and keywords observed on extensionworkshop.com

12 phrases

These phrases were extracted locally from sampled public page metadata. They are observations, not search-volume or ranking estimates.

firefox extension workshopTitle10 sampled pages
add onTitle, H1, Meta description3 sampled pages
extensionsTitle, Meta description4 sampled pages
firefox extensionsTitle, Meta description3 sampled pages
webextensions apiTitle, H1, Meta description2 sampled pages
creating publishing firefoxTitle, Meta description2 sampled pages
securityH1, Meta description3 sampled pages
featuresTitle, H1, Meta description2 sampled pages
add onsMeta description3 sampled pages
help creatingTitle, Meta description2 sampled pages
extension to lifeH12 sampled pages
apisMeta description3 sampled pages

At a glance

Key findings

✓

Report is current

The displayed evidence comes from the published immutable scan.

i

Confidence is separate

Unavailable evidence is shown as missing and never counted as clean.

!

Verify before sensitive actions

Check the exact URL and context before payments, credentials, or downloads.

Fully explainable

Why this score?

Versioned weights
Threat IntelligenceWeight 25%
55/100

Threat providers were unavailable. The neutral uncertainty baseline is not a clean verdict.

Domain HistoryWeight 10%
86/100

Domain registration age and expiry were checked.

InfrastructureWeight 10%
80/100

Observed DNS records and network address were checked.

Website SecurityWeight 15%
95/100

Observed certificate validity and TLS protocol were checked.

Security HygieneWeight 15%
80/100

Observed security header values were checked for basic protective settings. Empty values, disabled HSTS and unrecognized values receive no credit. This is not a complete browser-policy validation.

TransparencyWeight 5%
53/100

Observed site metadata and About page were checked. Publisher-supplied details are not independently verified.

ReputationWeight 5%
50/100

Popularity is weak context, not proof of safety. Unranked sites use a neutral baseline.

Operational StabilityWeight 15%
96/100

Observed HTTP status and final connection scheme were checked.

Server-side analysis

Automated security checks

Local antivirus and phishing checks

ClamAV · homepage HTMLNo signature match in the sampled HTML
Engine version1.5.4
Signature database date (UTC)2026-10-12T06:24:02+00:00
HTML bytes submitted120,017
Phishing.Database · exact hostnameNot listed in this snapshot
Feed downloaded (UTC)2026-10-12T18:00:14+00:00
Hosts in local snapshot386,082

Sampled scripts and pages

Resource analysis incomplete

4 resources checked · 2 script links observed on the homepage. Partial resource coverage.

ClamAV inspects the fetched homepage HTML on our server. New scans also sample up to four linked scripts and two collected internal pages, with size and time limits. Scripts are not executed. Other downloads, private server files and logged-in pages remain outside this check. A signature match needs investigation and can be a false positive. No match is not a whole-site safety guarantee.

Exact hostname lookup uses a downloaded Phishing.Database snapshot. It does not send this domain to an external lookup API or mark sibling subdomains as harmful. Not listed does not mean safe. Snapshot age is download age, not proof that every entry was recently revalidated.

Homepage HTML only · Eight local rule families · local-security-v2

Checks use the fetched page and redirect chain. Scripts are not executed, forms are not submitted, and linked files are not downloaded. This is not a malware clearance.

Page resource inventory

Linked scripts2
Inline scripts1
Embedded frames0
External script hosts0

Counts describe the sampled HTML, not every resource loaded by the browser. External resources are common and are not automatically harmful.

No listed local patterns observed. The limited rule set cannot detect every threat or behavior.

External threat intelligence

Provider coverageNot checked

Local checks do not query external reputation databases. An unavailable check is never a clean result.

Registration

Domain information

Public RDAP observation
Canonical domainextensionworkshop.com
RegistrarMarkMonitor Inc.
RegisteredDec 21, 2018
Domain age7 years
ExpiresDec 21, 2026
Registry statusesclient delete prohibited · client transfer prohibited · client update prohibited
Report statePublished

Infrastructure

Network & hosting

Observed endpoint, not legal location
IP address35.190.48.53
Autonomous systemUnavailable
Network organizationUnavailable
Observed countryUnavailable
CDNNot detected
Web application firewallNot detected

At a glance

Infrastructure summary

Observed during this scan

A compact view of the connection, DNS and security surface. These observations describe what the scanner could verify at scan time and do not prove ownership or ongoing availability.

HTTP response200 · https://extensionworkshop.com/
Endpoint35.190.48.53
NetworkUnavailable
CDN and WAFNot detected · Not detected
DNS surface5 records · 4 nameservers · 0 mail exchangers
Protection signals5 security headers · 2 technologies · DNSSEC unknown

Page telemetry

Observed page statistics

Safe metadata only

These counters describe the fetched response and sampled HTML. Script counts describe references in the markup, not a complete browser network log. Cookie counts cover observed response headers.

Response size120,017 bytes
HTTP check duration0 ms
Cookies observedUnavailable
Script resources2 · 0 external hosts
Frames and sampled checks0 frames · 4 resources checked

Encrypted transport

TLS certificate

Valid when observed
StatusValid when observed
ProtocolTLSv1.3
IssuercountryName=US, organizationName=Google Trust Services, commonName=WR3
Valid fromAug 22, 2026
Valid untilNov 20, 2026
Certificate namesextensionworkshop.com

Resolution

DNS footprint

DNSKEY status unknown

DNSKEY presence does not verify the DNSSEC signature chain. Missing records can mean no record was returned or the lookup was unavailable.

A35.190.48.53TTL —
NSns-1386.awsdns-45.orgTTL —
NSns-1957.awsdns-52.co.ukTTL —
NSns-420.awsdns-52.comTTL —
NSns-704.awsdns-24.netTTL —

DNS observations · no external lookup API

Domain email protection

Exact-host SPF and DMARC observations help the owner investigate email impersonation risks. They are separate from website malware checks and do not change the Safety Score.

SPFNo matching record returned for this exact hostname
DMARCNo matching record returned for this exact hostname

What to do next

Review the records with your mail administrator. Inventory legitimate senders and test SPF and DKIM alignment before enforcing a stricter DMARC policy. Fix duplicate records and investigate overly permissive SPF rules.

This bounded check does not send email, probe SMTP, evaluate recursive SPF includes, verify DKIM signatures or apply organizational-domain DMARC inheritance. A missing subdomain record does not prove that no inherited protection exists. A DNS timeout is unknown, not an absent record. A policy record is not proof that messages authenticate successfully.

Responsible disclosure

security.txt

RFC 9116 observation

No readable security.txt file was observed at the standard locations. This is informational and is not evidence of malware.

Browser protections

Security headers

5 observed
content-security-policypresent default-src 'none'; img-src 'self' data:; form-action 'self' https://www.mozilla.org/en-US/newsletter/; media-src 'self' blob:; script-src 'self' https://www.youtube.com/iframe_api https://www.youtube.com/s/player/ 'sha256-vqFvYKh0rwFP9fSa0PuzUff2ElHQ+rkjGfycqUNqufQ=' https://www.googletagmanager.com/gtag/js ; font-src 'self'; frame-ancestors 'none'; frame-src https://www.youtube.com/embed/ https://calendar.google.com/calendar/appointments/; base-uri 'none'; style-src 'self' 'unsafe-inline'; connect-src 'self' https://blog.mozilla.org/addons/feed/ https://www.mozilla.org/en-US/newsletter/ https://*.google-analytics.com;
referrer-policypresent no-referrer-when-downgrade
strict-transport-securitypresent max-age=31536000
x-content-type-optionspresent nosniff
x-frame-optionspresent SAMEORIGIN

Response headers

Cookie protections

Passive observation

No Set-Cookie header was observed on the sampled homepage response. Other pages may set cookies separately.

Detected stack

Technologies

Google Analytics 94% Tailwind CSS 72%

Versions are shown only when publicly exposed by the page or response headers. An observed version is not, by itself, proof of a vulnerability.

JavaScript library advisories

2 sampled JavaScript files checked locally with Retire.js. Database snapshot: 2026-10-12T02:40:13.167Z.

jquery 3.7.1 No known advisories matched this version in the database snapshot.
DOMPurify 3.4.12 2 known advisories. CVE-2026-75838

A version match is not proof that the website is infected or that an issue is exploitable here. Owners should review the advisory, check whether their code is affected and test an update. Up to four external script files are sampled, not every dependency, inline script or dynamically loaded resource.

About this website

What the site says about itself

Learn the fundamentals of the WebExtensions API. Explore the power of the browser extensions APIs for building robust and feature-rich Firefox add-ons.

View the site's About page ↗

This is publisher supplied information. The independent safety findings are shown separately.

Structured facts

Website identity & response

Public page metadata
Page titleFirefox Extension Workshop | Get help creating & publishing Firefox extensions.
First headingExtend the Web
DescriptionGet help creating & publishing Firefox extensions.
Canonical URLhttps://extensionworkshop.com/
Final URLhttps://extensionworkshop.com/
HTTP response200 · text/html · duration unavailable
Languageen
Structured typesWebSite
Page page detectedhttps://extensionworkshop.com/documentation/develop/testing-persistent-and-restart-features/About page detectedhttps://extensionworkshop.com/documentation/develop/about-the-webextensions-api/
missing100% evidence confidence
1100% evidence confidence
en100% evidence confidence
1100% evidence confidence
Local headers.permissions policy present100% evidence confidence
5100% evidence confidence
4100% evidence confidence
Dns consistency.mail route count100% evidence confidence
unavailable100% evidence confidence
Dns consistency.cname present100% evidence confidence
1100% evidence confidence
1100% evidence confidence
Local headers.hsts preload100% evidence confidence
31536000100% evidence confidence
Local headers.hsts include subdomains100% evidence confidence
Local headers.csp wildcard sources100% evidence confidence
1100% evidence confidence
Local headers.csp unsafe eval100% evidence confidence
1100% evidence confidence
Local headers.csp has object src100% evidence confidence
1100% evidence confidence
1100% evidence confidence
1100% evidence confidence
Local headers.cors credentials with wildcard100% evidence confidence

Connection path

Redirect chain

0 recorded hops

No redirect hop was recorded for the sampled homepage.

Premium monitoring

Catch downtime and security changes automatically

Regular checks, availability history, and alert emails are reserved for Premium websites. Free reports remain point-in-time scans and do not create recurring server work.

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Compared with the previous scan

What changed

A comparison will appear after the next completed scan.

Explainable matching

Digital fingerprint

fingerprint-v1
calm-signal-field-208

Comparable components help find technically related websites. A match does not prove common ownership.

DnsHashed private comparison value
TechnologiesHashed private comparison value

Material changes only

Change history

Show change history

No meaningful changes recorded yet.

Website icon for extensionworkshop.com

Visual evidence

Website screenshot

Screenshot of extensionworkshop.com
Captured once in an isolated browser during this scan. Visual tint is an interface overlay. The original evidence is not duplicated.

For site owners

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Use the current report link so visitors can verify the evidence. A badge is a transparency signal, not a paid ranking boost.

Questions about extensionworkshop.com

FAQ

Still have questions? Contact us →
Is extensionworkshop.com safe to visit?

The latest Safety Score is 76/100 with 75% Evidence Confidence. This is a point-in-time assessment of observed technical signals, not a guarantee. Check the exact address and avoid entering payment details if anything looks unusual.

Did the scan detect malware on extensionworkshop.com?

ClamAV found no signature match in the sampled homepage HTML. External scripts, downloads and private server files were not checked. This is not a whole-site malware clearance.

When was extensionworkshop.com registered?

The public registry record shows Dec 21, 2018. Registration details may be privacy-protected or updated later.

Did extensionworkshop.com have a valid TLS certificate?

The scanner observed a valid TLS certificate using TLSv1.3. A valid certificate alone does not establish that the site is safe.

How does extensionworkshop.com describe itself?

The website's About page describes its purpose in the report above. This is publisher-supplied information and is separate from independent security findings.

Can a paid listing change this website's score?

No. Premium placement and owner-supplied pages are labelled separately. Technical evidence, the Safety Score and moderation decisions remain independent.

Share your experience with extensionworkshop.com

Community reviews are moderated and remain separate from the technical Safety Score.

Write review →