Socket Web Extension by Socket is designed to enhance security while browsing by detecting suspicious packages and providing real-time threat detection. It protects against malicious packages and commands from any website, including GitHub, StackOverflow, blogs, and documentation sites. The extension displays security metrics and threat detection data, making it easier to navigate and understand potential security risks. It is configured to work with various ecosystems such as PyPI, Go, and Maven, and includes features to improve performance and user interface based on user feedback.