Smart Popup Blocker

The extension modifies web pages by inserting new HTML content. If the code handling this insertion has a bug, it could theoretically allow malicious scripts to run on your computer.

Technical: Code analysis shows 'innerHTML' assignment patterns. While typically used for safe DOM updates in ad-blockers, improper sanitization of user-defined whitelist rules or dynamic element creation could lead to Stored XSS if an attacker can inject content into the extension's storage.

💡 Ad blockers must dynamically remove elements; innerHTML is a standard method for this, provided input is sanitized.

The extension uses complex code encoding techniques that make it harder to read. This can hide the true logic of the extension, making security audits difficult.

Technical: Analysis detected 'String.fromCharCode' and 'charCodeAt' usage patterns typical of string obfuscation. This is often used to bypass Content Security Policy (CSP) checks or hide malicious payloads, though it is also a common technique for legitimate extensions to minify code.

💡 Obfuscation is frequently used to reduce file size and protect intellectual property logic.

The extension loads scripts from outside its own package. This increases the risk that a compromised third-party library could steal your data or hijack the extension.

Technical: Service worker analysis indicates dynamic script loading. If these external scripts are not served over HTTPS or come from untrusted CDNs, they could be manipulated by attackers to execute arbitrary code in the context of any website you visit.

💡 Extensions often load libraries for specific features (e.g., regex matching, UI components).

The extension has permission to run on every website ('*://*/*'). This means it can see everything you do online, including sensitive sites like banks or email providers.

Technical: Manifest V3 <all_urls> combined with 'scripting' and 'webRequest' allows full context access. While intended for ad-blocking, a vulnerability in the extension could allow an attacker to read keystrokes (if implemented poorly) or exfiltrate session cookies from any site.

💡 Required for universal ad-blocking functionality.

The extension does not enforce strict security rules on its own code execution. This makes it more vulnerable to attacks if a malicious script manages to get inside the extension.

Technical: No CSP headers are set in the service worker or content scripts. Without a restrictive CSP, any injected script can access browser APIs and DOM elements freely, increasing the blast radius of a potential compromise.

💡 Some extensions omit CSP for simplicity, though this is considered a security best practice violation.

The analysis flagged potential keystroke capture capabilities. While likely intended for blocking password managers, this is a severe risk if misused.

Technical: Code patterns suggest monitoring of input events or clipboard access. If the extension code is compromised by an attacker controlling the server-side logic (if any) or via supply chain attack, they could log passwords and credit card numbers typed into forms.

💡 Ad blockers sometimes need to detect password managers to avoid blocking their pop-ups.