The recent release of the Execution Cache marks a significant improvement in the speed and efficiency of time-travel debugging in Firefox, reducing the time to load execution indices from 45 seconds to just 7 seconds by storing and restoring them instead of rebuilding each time. This advancement, achieved by moving replaying to the cloud and instrumenting JavaScript execution, allows for faster replays and more efficient computing, as execution indices, though initially large, compress well. Additionally, the transition to simpler React components from CodeMirror has enhanced the user interface, eliminating previous glitches and improving responsiveness. The collaboration with Midnite has been instrumental, doubling their engineering team and enhancing support capabilities, while ongoing user feedback continues to shape the evolution of Replay's debugging experience. As Thanksgiving approaches, the team expresses gratitude for user support and engagement, underscoring the shared journey in developing a reliable debugging tool.