cBlock Origin Firefox extension security report

This permission allows modification of Chrome's privacy settings. Rated Critical because it can disable security features, modify network configurations, and compromise browser security settings.

This permission enables the extension to monitor and analyze all web requests made by the browser. Rated Critical because it can observe all network traffic including sensitive data, track browsing behavior, and gather authentication tokens.

This permission allows the extension to intercept, modify, or block any web request in real-time before it reaches its destination. Rated Critical because it can modify sensitive data (like passwords, credit cards) before encryption, redirect traffic to malicious sites, or block security updates.

Broad host access — the extension can read/modify content on every website.

This extension can intercept, modify, and block web requests in real-time.

This permission resolves DNS records and modifies DNS settings. Rated High because it can monitor domain lookups, potentially redirect traffic, and gather browsing patterns.

This permission enables monitoring of all browser navigation events and transitions. Rated High because it can track every page visit, navigation method, and browsing pattern, potentially exposing sensitive browsing behavior and user activities.

The following context increases the overall risk:• 20% increase: Access to sensitive domains increases potential impact• 10% increase: Early script execution enables pre-emptive content manipulation• 15% increase: Older manifest version lacks modern security controls• 10% increase: About:blank access enables potential sandbox escape vectors

This extension has broad host permissions allowing it to access many or all websites.

This permission allows storing data locally in the browser. Rated Medium because it can persist sensitive user data, track user activities over time, and potentially store malicious payloads.

This permission enables tab management and monitoring. Rated Medium because it can track open tabs, access tab metadata, and monitor user browsing patterns.

This permission removes storage quota restrictions. Rated Medium because it can store large amounts of user data without limits, potentially impacting browser performance and storing extensive tracking data.

This extension requests access to sensitive domains: https://github.com/*, https://*.github.io/*, https://github.com/uBlockOrigin/*, https://ublockorigin.github.io/*

This extension runs content scripts at document_start.

This extension can run content scripts in about:blank pages.

This extension uses Manifest Version 2

This permission schedules periodic tasks. Rated Low because it can only trigger events at specified times without access to sensitive data.

This permission (Firefox) adds items to browser context menus. Rated Low because it only modifies right-click menus without access to page content.