HTTP cookies remain an integral tool for session management, personalization, and user behavior analysis, despite the availability of modern alternatives like the Web Storage API. In the realm of synthetic monitoring, cookies play a crucial role in establishing a consistent performance baseline, especially when dealing with dynamic web experiences such as A/B testing scenarios. Dynatrace has introduced a new feature that allows users to set cookies to enforce specific application states, ensuring consistent monitoring conditions. This feature enables users to define cookie parameters such as name, value, domain, and path, which can be applied at the monitor level or for specific events within browser monitors and clickpaths. This capability is essential for generating meaningful baselines by simulating particular user states and behaviors, thus enhancing the precision of performance analyses. Additionally, a new option to block specific requests during monitor execution has been introduced, further refining the monitoring process.