Simple Tab Groups 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.

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 provides full access to read and modify browser cookies. Rated High because it can steal session tokens, modify authentication cookies, and compromise accounts across websites.

This permission accesses recently closed tabs and windows. Rated High because it can monitor user activity, recover closed sensitive pages, and track browsing patterns.

This permission controls file downloads and accesses download history. Rated High because it can download malicious files, access sensitive downloaded documents, and track user download patterns.

Enables extensions to maintain long-term presence, manage data extensively, and potentially access sensitive browsing sessions and cookies.

The following context increases the overall risk:• 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 extension can inject scripts into any website.

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 (Firefox) hides tabs from the tab strip. Rated Medium because it can conceal activity the extension performs in a hidden tab.

This permission (Firefox) manages container tabs. Rated Medium because it can create, remove and inspect the identity containers that isolate a user's sessions from each other.

This permission manages other installed extensions. Rated Medium because it can enable/disable other extensions and modify their settings, with changes being visible to users.

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.

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 displays system notifications. Rated Low because it can only show user-visible notifications without accessing system data.

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