Worked on enhancing Applink’s startup performance by introducing targeted profiling markers within the mozilla/gecko-dev repository. Focused on instrumenting the GeckoView initialization process, the developer added markers to track both the opening and readiness milestones, enabling precise measurement of startup latency. This approach leveraged C++ for implementation and emphasized performance profiling and debugging skills. The new instrumentation provides reliable diagnostics for startup events, supporting data-driven optimization efforts and laying the foundation for improved user experience. Collaboration with multiple review teams ensured robust code quality and integration. The work addressed a specific feature request, contributing to more efficient mobile application launches.