SquareX Browser Detection and Response (BDR) is a browser security solution that provides real-time monitoring, threat detection, and proactive response to browser-based attacks. The solution operates as a browser extension that continuously tracks browser activity and responds to emerging threats such as malicious scripts, phishing attempts, and browser-based malware. The BDR solution enables enterprises to provide contractors and remote workers with secure access to internal applications, secure private environments without VDI, and converts browsers on BYOD and unmanaged devices into trusted browsing sessions. The extension can be deployed and removed via GPO/MDM and supports a "Bring Your Own Browser" approach without requiring changes to user behavior. The solution operates with elevated privileges to monitor web pages, user actions, network traffic, and other extensions. It provides full control over web flows with enforcement capabilities while maintaining automatic compatibility with all platforms supported by the browser. The extension receives automatic updates without requiring browser or system restarts and benefits from automatic browser patching of zero-day vulnerabilities. SquareX BDR is developed by a team of offensive security researchers who have presented their work at security conferences and discovered vulnerabilities in Secure Web Gateways and email platforms.