Building a web browser from scratch is widely recognized as one of the most challenging endeavors in software development. In this context, it is noteworthy that Cursor has deployed hundreds of autonomous AI agents to tackle this complex task. After nearly a week of continuous operation, these agents successfully produced a functioning web browser complete with its own rendering engine. This development not only highlights the potential of AI in software engineering but also raises questions about the future of browser technology and the role of AI in such intricate projects. A balanced assessment of this achievement must consider both the opportunities it presents and the inherent risks associated with relying on autonomous systems for critical software development. As the landscape evolves, it will be essential to monitor regulatory responses and market dynamics that may influence the broader implications of this innovation.