Old Twitter Layout (2025) Firefox extension security report

This permission allows injection and execution of JavaScript on any webpage. Rated Critical because it can modify page content, steal sensitive data, and inject malicious code into any site the extension has access to.

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.

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

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

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 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.

Host permission — access limited to this URL pattern.

Host permission — access limited to this URL pattern.

Host permission — access limited to this URL pattern.

Host permission — access limited to this URL pattern.

Host permission — access limited to this URL pattern.

Host permission — access limited to this URL pattern.

Host permission — access limited to this URL pattern.

Host permission — access limited to this URL pattern.

This extension requests access to sensitive domains: *://*.twitter.com/*, *://twitter.com/*, https://raw.githubusercontent.com/*, https://twitter.com/*?*newtwitter=true*, https://x.com/*?*newtwitter=true*, https://twitter.com/*

This extension runs content scripts at document_start.

This extension uses Manifest Version 2