# GuardRail Browser Security

> A guardrail for your web browser - AI-powered protection against malicious sites

Canonical page: [https://chrome-stats.com/d/guardrail-browser-security](https://chrome-stats.com/d/guardrail-browser-security)

## Overview

- **ID:** `guardrail-browser-security`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** GuardRail
- **Category:** privacy-security
- **Daily users:** 16
- **Version:** 2.9.7
- **Last updated:** 2026-08-17
- **First published:** 2025-08-28
- **Size:** 106 KB
- **Data as of:** 2026-09-13
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/guardrail-browser-security/)
- **Website:** [https://myguardrail.io](https://myguardrail.io/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/guardrail-browser-security/privacy/](https://addons.mozilla.org/firefox/addon/guardrail-browser-security/privacy/)

## Description

GuardRail Browser Security provides enterprise-grade protection against malicious websites, phishing attempts, and online threats using advanced AI technology.

KEY FEATURES:
✓ Real-time threat detection using local AI models
✓ Privacy-focused - minimal data transmission
✓ Instant blocking of detected threats
✓ Customizable whitelist for trusted sites
✓ Monitor mode for testing without blocking
✓ Lightweight and fast - minimal performance impact
✓ Enterprise deployment ready

HOW IT WORKS:
GuardRail uses a two-layer protection system. Initial AI detection happens locally in your browser, with cloud verification only for unknown threats. Like a highway guardrail that keeps you from going off the road, GuardRail keeps you from visiting dangerous sites.

PERFECT FOR:
• Businesses requiring secure browsing
• MSPs protecting multiple clients
• Privacy-conscious users
• IT departments managing endpoints
• Anyone wanting protection from phishing and malware

PRIVACY FIRST:
GuardRail minimizes data transmission. Only URLs are sent for verification when needed - never page content, passwords, or personal data. All initial threat detection happens locally.

MONITOR MODE:
Test GuardRail's protection without blocking. Monitor mode logs potential threats without interrupting your browsing, perfect for evaluation periods.

## Rankings

- #27,737 — Overall
- #38 — security
- #96 — secure
- #154 — password-protected
- #206 — malware
- #230 — browser

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `notifications`
- `alarms`
- `webNavigation`
- `webRequest`
- `webRequestBlocking`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Moderate 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 was recently updated in the past month. New updates 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).

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Source: [Chrome-Stats](https://chrome-stats.com/d/guardrail-browser-security)