Netcraft Extension

Name: Netcraft Extension
Rating: 4.3409 (44 reviews)
Author: Netcraft Ltd

By: Netcraft Ltd

Comprehensive site information and protection from phishing and malicious JavaScript when browsing the web

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Features & Capabilities

The Netcraft Extension provides comprehensive protection while browsing the web. It helps users identify site details and offers robust defense against phishing attacks by leveraging a vigilant anti-phishing community that rapidly blocks fraudulent sites. Additionally, it safeguards users from malicious JavaScript such as shopping site skimmers and web miners by blocking compromised pages and auto-reporting threats.

Key features include credential leak detection that blocks sensitive data from reaching malicious domains, detailed site reports accessible with one click, and a convenient way to report suspicious sites to Netcraft. The extension ensures your online shopping and browsing remain secure by constantly updating its threat database and empowering the community to contribute to safer internet browsing. To learn more, visit https://toolbar.netcraft.com.

User Growth & Download Statistics

Add-on

By:

Daily users:

Rating:

Version:

2.1.2 Last updated: 2024-02-26

Version code:

5697197

Creation date:

2005-10-06

Risk:

Permissions:

Host permissions:

<all_urls>

Content scripts matches:

<all_urls>

Size:

769.94KB

Email:

su*****@netcraft.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 1,587 ▼ 9

Other rankings

#300 in Privacy & Security ▼ 3

#22 in extension keyword 84

#22 in extension guard keyword 52 ▼ 1

#23 in netsuite keyword 18

#50 in javascript keyword 45 ▲ 1

Upgrade to see more rankings

Other platforms

Netcraft Extension (v2.1.2)

60,000 4.43

(167)

Netcraft Phishing Protection (v1.4.0)

43,531 4.10

(255)

Netcraft Extension (v2.1.2)

24,040 4.20

(8)

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Netcraft Ltd

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/netcraft-toolbar/

Email:

su*****@netcraft.com

Website:

https://netcraft.app/

Permission Change History

2023-12-06: Version 2.1.0 → 2.1.1

Remove Permissions: scripting

2023-11-20: Version 1.18.1 → 2.0.1

Add Host permissions: <all_urls>

Add Permissions: scripting

Remove Permissions: <all_urls>

User Reviews

Users consistently praise Netcraft for detailed site-safety data, fast reaction to suspicious sites, longevity/Trust, and usefulness when deciding whether to enable scripts. The main recurring issue is occasional false negatives: some malicious sites were missed initially and needed re-analysis or user follow-up to be corrected.

Pros

Provides detailed site-safety information and risk ratings (site age, JS malware indicators)
Often reacts faster than built-in browser systems to flag new or suspicious sites
Well-maintained, long-standing extension with multiple endorsements and broad user trust
Useful for investigating a site before enabling scripts (helps decide whether to unblock NoScript or similar)

Cons

Occasional missed detections / false negatives — some reported malicious sites were not initially labeled and required re-analysis or follow-up to be corrected

Recent reviews

Appears to have been abandoned. Malicious sites are not flagged, reports of malicious sites are marked as "clear" (apparently by automated testing), and GeoIP information is out of date.

by Ca*****, 2026-05-29

by Ma*****, 2025-10-12

Bloque la résolution des vérification de certaines Captcha.

by Jo*****, 2025-07-25

View all user reviews ›

Is Netcraft Extension Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Netcraft Extension requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Netcraft Extension has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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