Modify Header Value (HTTP Headers) VS mitmproxy

• Custom Header Management
  Allows users to add, modify, or remove HTTP headers, providing greater control over the information sent and received by the browser.
• Testing and Debugging
  Facilitates the testing and debugging of web applications by enabling the manipulation of headers, which can simulate different server responses or client requests.
• Security and Privacy
  Enhances security and privacy by allowing users to modify headers that might contain sensitive information or to block certain headers completely.
• User-Agent Customization
  Enables the customization of the User-Agent string, allowing users to access content that might be restricted to certain devices or browsers.

Possible disadvantages

• Complexity for Non-technical Users
  May be difficult for non-technical users to understand and use effectively, as it requires knowledge of HTTP headers and their functions.
• Potential for Misconfiguration
  Incorrectly modifying headers can lead to misconfiguration issues, which might break website functionality or cause security vulnerabilities.
• Compatibility Issues
  Some websites might not operate correctly if certain headers are altered, leading to potential compatibility issues.
• Performance Overhead
  Altering headers might introduce additional processing overhead, which can impact browser performance, especially if a large number of rules are defined.

• Open Source
  mitmproxy is free and open source, allowing users to modify and contribute to the project. This ensures transparency and encourages community-driven improvements.
• Interactive Interface
  It offers a powerful interactive console interface that lets users inspect and modify HTTP and HTTPS requests and responses in real-time.
• Scripting Support
  mitmproxy supports Python scripting, which enables users to automate and customize their workflows easily.
• Cross-Platform
  The tool is available for multiple operating systems, including Windows, macOS, and Linux, making it accessible to a wide range of users.
• Extensive Documentation
  mitmproxy provides comprehensive documentation, tutorials, and community resources, which helps users get started and find solutions to issues quickly.
• TLS Support
  It has built-in support for TLS/SSL, which allows for the interception and inspection of encrypted traffic.

Possible disadvantages

• Learning Curve
  The tool has a steep learning curve, especially for users who are not familiar with networking concepts or Python scripting.
• Resource Intensive
  Running mitmproxy can be resource-intensive, especially when dealing with high traffic volumes, which might affect system performance.
• Limited GUI Options
  While mitmproxy offers a powerful console interface, the graphical user interface (GUI) options are somewhat limited compared to other tools.
• Potential Legal and Ethical Issues
  Intercepting traffic with mitmproxy can raise legal and ethical concerns, especially if used without proper authorization or in violation of privacy laws.
• Compatibility Issues
  There can be compatibility issues with some applications that implement advanced security measures, leading to difficulties in intercepting and modifying traffic.

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  Yep that started recently. I found a solution with the add-on Modify Header Value (HTTP Headers) , you need to add two rules:. Source: about 3 years ago

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