This pull request introduces the handling of sensitive data across multiple files and functionalities. It ensures that sensitive information is securely managed by using placeholders instead of actual values. The most important changes include modifications to the Agent and MessageManager classes to support sensitive data, as well as updates to the documentation and examples to demonstrate the new feature.

Sensitive Data Handling:

• browser_use/agent/message_manager/service.py: Added a sensitive_data parameter to the __init__ method, and implemented methods to filter out sensitive data from messages. [1] [2] [3]
• browser_use/agent/service.py: Added a sensitive_data parameter to the __init__ method and passed it to the MessageManager. [1] [2]
• browser_use/controller/registry/service.py: Added a sensitive_data parameter to the execute_action method and implemented a method to replace sensitive data in parameters. [1] [2]
• browser_use/controller/service.py: Updated methods to accept and handle the sensitive_data parameter. [1] [2]

Documentation and Examples:

• docs/customize/sensitive_data.mdx: Added a new documentation page explaining how to handle sensitive data securely.
• docs/mint.json: Updated the navigation to include the new sensitive data documentation.
• examples/features/sensitive_data.py: Added an example script demonstrating the use of sensitive data with the Agent class.