Tab Stash Firefox extension security report

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 (Firefox) allows the extension to read and modify global browser settings, including proxy-adjacent networking, DNS-over-HTTPS and homepage configuration. Rated High because it can weaken browser security posture globally.

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.

The following context increases the overall risk:• 15% increase: Older manifest version lacks modern security controls

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 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 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 extension uses Manifest Version 2

This permission manages browser bookmarks and folders. Rated Low because it can only modify bookmark data, which is not sensitive and changes are visible to users.

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