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How to Audit Browser Extensions for Malware Using AI

The Challenge: Browser Extension Privacy Risks

Many users rely on web browsers like Google Chrome, Vivaldi, and Midori for their daily tasks. To enhance functionality, we often install extensions such as DuckDuckGo Tracker Protection or uBlock Origin Lite.

However, a significant security problem exists: many extensions request extensive permissions, such as "read all data on all websites." This creates a potential risk for sensitive activities like online banking. How can a user verify if an extension is collecting or transmitting data maliciously?

The Solution: Static Code Analysis with Perplexity.AI

You can perform a personal security audit on any browser extension by combining open-source tools with Large Language Models (LLMs). This method allows non-programmers to review code for malicious behavior effectively.

Step-by-Step Guide to Checking Extension Safety

Here is the workflow I use to ensure my extensions are safe:

  1. Download the Source Code: Install the Chrome Extension Source Viewer extension (free). This tool allows you to download the raw source code of any extension from the Chrome Web Store without installing it effectively.

  2. Extract and Review: View the code files to verify they are legitimate code files (usually Javascript).

  3. AI Security Audit: Upload the code or copy segments into Perplexity.AI Pro.

  4. Prompt for Analysis: Ask the AI to "evaluate this code for malicious patterns, data exfiltration, or unnecessary permission requests."

Results and Conclusion

In my recent audit of my own browser tools, Perplexity.AI successfully reviewed the code and confirmed that none of my active extensions contained suspicious logic. This process provides peace of mind and acts as a free, powerful layer of personal cybersecurity. I am writing this blog entry to share lessons learned about things that solved a problem for me:

Note - your result may vary and you also can use other AI system.


Highly recommended. Source Viewer extension is free, btw.. Just do it, it is worth the piece of mind.

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