What technology helps protect users from new malicious JavaScript on websites?

Browser Isolation is the correct choice for protecting users from new malicious JavaScript on websites because it operates by creating a virtualized environment where web content is executed. This technology essentially isolates the untrusted web content from the user's local machine or network. When a user visits a website that might contain malicious JavaScript, the browser isolation technology ensures that the execution of that JavaScript occurs in a separate environment. This prevents any potential harm or data leakage from affecting the user's device or network, effectively mitigating risks associated with web-based threats.

Other options do have security roles, but they don't specifically focus on handling the execution of JavaScript in real-time as effectively as browser isolation. VPN technology primarily focuses on securing internet connections, but it does not inherently protect against malicious web content. A Content Delivery Network (CDN) is designed to enhance website performance and availability, rather than securing against threats such as malicious scripts. A Web Application Firewall (WAF) can provide protection against specific types of attacks targeting web applications, but it does not isolate or execute potentially harmful content away from the user's system. Thus, browser isolation stands out as the most effective means to mitigate risks from malicious JavaScript on websites.