# Netcraft Extension

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

Canonical page: [https://chrome-stats.com/d/netcraft-toolbar](https://chrome-stats.com/d/netcraft-toolbar)

## Overview

- **ID:** `netcraft-toolbar`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Netcraft Ltd
- **Category:** privacy-security
- **Daily users:** 3,050
- **Weekly downloads:** 111
- **Rating:** 4.34 / 5 (44 ratings)
- **Version:** 2.1.2
- **Last updated:** 2024-02-26
- **First published:** 2005-10-06
- **Size:** 770 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/netcraft-toolbar/)
- **Website:** [https://netcraft.app/](https://netcraft.app/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/netcraft-toolbar/privacy/](https://addons.mozilla.org/firefox/addon/netcraft-toolbar/privacy/)

## Description

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.

## Rankings

- #1,648 — Overall
- #314 — Privacy & Security
- #23 — extension guard
- #23 — netsuite
- #25 — extension
- #56 — javascript

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `webNavigation`
- `webRequest`
- `webRequestBlocking`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

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

## Similar extensions and apps

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Source: [Chrome-Stats](https://chrome-stats.com/d/netcraft-toolbar)