The Replay team has announced a new version of React DevTools, written from scratch by Brian Vaughn, which introduces enhancements such as time travel capabilities within the UI, allowing users to highlight changes in component props and state, and preview hooks' names and definitions. This update builds on the history of React DevTools at Replay, which has evolved from its initial Firefox release to a Chrome version that reduces recording overhead and offers new functionality, like source mapping component names in production. In addition to React DevTools, the team has made updates to Redux DevTools, enabling faster jumps to dispatch points and improving source search functionality. They also shared insights from debugging test flakes, exemplifying how Replay's tools help address challenges in software testing, such as reducing instability in tests due to minor timing differences. These advancements reflect Replay's ongoing commitment to enhancing developer workflows through innovative tools and features.