Built StopX after struggling with the limitations of traditional blocklist-based filters. Most existing solutions rely on static URL databases that are constantly outdated and easily bypassed. Our approach uses proprietary WebShield™ technology that combines: Real-time AI image recognition for visual content analysis Contextual URL pattern matching beyond simple domain blocking Cross-device synchronization with encrypted settings sync Military-grade bypass protection with stealth mode operation The interesting technical challenge was achieving 99.7% accuracy while maintaining sub-100ms response times. We solved this with a lightweight edge model that preprocesses content before it reaches the browser, combined with cloud-based deep analysis for edge cases. Currently supporting Chrome, Firefox, iOS, Android, Windows, and Mac with seamless cross-platform experience. The system has processed over 50M requests with 250K+ active users. Technical deep-dive and API documentation available. Happy to discuss the computer vision and real-time filtering challenges we solved. Try it free: https://stopx.today