Simon Wijckmans, founder of c/side -- a company that focuses on monitoring, securing, and optimizing third-party JavaScript -- joins SE Radio host Kanchan Shringi for a conversation about the security risks posed by third-party browser scripts. Through real-world examples and insights drawn from his work in web security, Simon highlights the dangers, including malicious attacks such as the recent Polyfill.io incident. He emphasizes the need for vigilant monitoring, as these third-party scripts remain essential for website functionalities like analytics, chatbots, and ads, despite their potential vulnerabilities. Simon explores the use of self-hosting solutions and content security policies (CSPs) to minimize risks, but he stresses that these measures alone are insufficient to fully safeguard websites.  As the discussion continues, they delve into the importance of layering security approaches. Simon advocates for combining techniques like CSPs, real-time monitoring, and AI-driven analysis, which his company c/side employs to detect and block malicious scripts. He also touches on the complexities of securing single-page applications (SPAs), which allow scripts to persist across pages without full reloads, increasing the attack surface for third-party vulnerabilities. Brought to you by IEEE Computer Society and IEEE Software magazine.