Outlook.com mailto Firefox extension security report

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

Host permission — access limited to this URL pattern.

This extension requests access to sensitive domains: *://outlook.com/send/*

This extension uses Manifest Version 2

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