DeepL 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 permission allows the extension to define rules to block, redirect, or modify network requests. Rated Critical because it can control all network traffic, potentially blocking security updates or redirecting to malicious sites.

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

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

Enables sophisticated data theft through script injection and traffic monitoring

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

This permission accesses Chrome identity service and user information. Rated High because it can obtain OAuth tokens, access connected accounts, and impersonate the user in authenticated service.

The following context increases the overall risk:• 25% increase: Unsafe code evaluation capabilities increase attack surface

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

This extension can inject scripts into any website.

This extension's CSP allows "wasm-unsafe-eval".

This permission grants temporary access to the current tab. Rated Medium because it can access current page content when invoked, though limited to user-initiated actions.

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

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