Worked on the mozilla/gecko-dev repository to enhance Android testing stability and infrastructure. Addressed test instability by disabling the Home Screen Jump-Back feature, resolving a recurring issue and improving reliability for automated UI tests. Expanded test coverage by enabling WebReporter UI tests to run across all build types, not just release builds, ensuring broader validation. Streamlined the continuous integration pipeline by removing obsolete x86 flank configurations and upgrading the Android SDK to version 34 for ARM builds. Utilized Java, Kotlin, and YAML to implement these changes, which reduced maintenance overhead and enabled faster, more robust feedback cycles for Android development.