During the month, this developer focused on enhancing memory safety across Android applications by enabling the Arm Memory Tagging Extension (MTE) in the thunderbird/thunderbird-android, nextcloud/notes-android, and nextcloud/android repositories. The work involved updating AndroidManifest.xml files to opt into MTE using the memtagMode setting, ensuring improved debugging and resilience with minimal impact on user-facing behavior. Emphasizing commit hygiene and cross-repository consistency, the developer laid the groundwork for safer production deployments and streamlined incident investigation. The technical approach demonstrated proficiency in Android development, debugging, and XML configuration, with all efforts directed toward proactive memory-safety improvements rather than reactive bug fixing.