extension-audit 1.1.0

A tool to audit browser extensions using mitmproxy

Project Overview

This is a package for reporting and analysing data sent to the servers of chrome extensions using the MITM Proxy.

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Prerequisites

• A compatible operating system (Windows, macOS, Linux)
• Google Chrome browser installed
• Access to a terminal/command prompt

Installation

1. Download Mitmproxy

   • Visit the official Mitmproxy website and follow the installation guidelines for your operating system.

2. Install Mitmproxy Certificate

   • Start Mitmproxy or Mitmweb by running the mitmweb command in the terminal.
   • Create a new Chrome profile:
     • Open Chrome.
     • At the top-right, click on the Profile icon (a circle with your account picture) and select Add.
     • In the pop-up window, choose Continue without an account.
     • Enter a name.
     • Click Done.
     • For more detailed instructions, refer to the official Chrome help page.
     • Open Chrome and navigate to chrome://version/.
     • Take note of the Executable Path and Profile Path. These paths may be useful for setting up the proxy.

3. Configure Chrome with Mitmproxy MacOS

   • Run the following command to start Chrome with the Mitmproxy proxy:

     open -a "Google Chrome" --args --proxy-server="http://localhost:8080"
     

   • If this doesn’t work, try:

     /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --proxy-server="http://localhost:8080"
     

   Windows

   • Open the terminal and navigate to the Chrome executable. For Windows 11, the typical path is:

     C:\Program Files\Google\Chrome\Application\chrome.exe
     

   • Run the following command to start Chrome with the Mitmproxy proxy server:

     .\chrome.exe --proxy-server="localhost:8080" --user-data-dir="C:\Users\<YourUsername>\AppData\Local\Google\Chrome\User Data\Profile<ProfileNumber>"
     

     Replace <YourUsername> and <ProfileNumber> with appropriate values.

4. Download and Install the Certificate

   • Visit mitm.it in the Chrome instance configured above.
   • Download the Mitmproxy certificate.
   • Install the certificate by:
     • Navigating to Chrome's settings: Settings → Privacy and Security → Security.
     • Selecting Manage Certificates and importing the downloaded certificate into the Trusted Root Certification Authorities.
   • Follow the prompts to complete the installation.

5. Verify Certificate Installation

   • Open Chrome and navigate to:

     Settings → Privacy and Security → Security → Manage Certificates.
     

   • Under Trusted Root Certification Authorities, confirm the Mitmproxy certificate is listed.

6. Install the extension_audit package

   • pip install the package

   pip install extension_audit
   

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Usage

• run the program by specifying the extension name to be used

  extension_audit <extention_name>
  

  For example:

  extension_audit maxai
  

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License

This project is licensed under the AGPL-3.0 License. See the LICENSE file for details.