June 2025 Monthly Summary (Gecko Dev and NEQO): 1) Key features delivered - NSS Encryption Mechanism API Enhancement (gecko-dev): Added PK11SDR_EncryptWithMechanism to support mechanism-based encryption (e.g., AES_CBC, DES3_CBC); deprecated PK11SDR_Encrypt and updated sdrtest to exercise mechanism selection. Commit: a5d2c320fa94e275aa0897dc3876900998100669. - NSS Release Notes and Release Information Update (Version 3.113) (gecko-dev): Introduced release notes for NSS 3.113 and updated release information, including a new release notes file and moz.yaml revision. Commit: 4f09ab5b55526db5b1fd7b4b9eb192ccc1f17407. - TLS Certificate Compression Support (neqo): Added SetCertificateCompression with encoding/decoding traits and callbacks; integration into SecretAgent and Connection; included tests for success and failure scenarios to improve TLS performance and resilience. Commit: c516262089f4f3c866ef5abd4ac24d8ca8e17d51. 2) Major bugs fixed - NSS upgrade path landed: Bug 1968764 – NSS_3_113_BETA2 UPGRADE_NSS_RELEASE (gecko-dev). - NSS release RTM update: Bug 1968764 – NSS_3_113_RTM UPGRADE_NSS_RELEASE (gecko-dev). 3) Overall impact and accomplishments - Strengthened module security and lifecycle management by enabling mechanism-based encryption and formal NSS 3.113 release readiness with notes and tooling updates. - Improved TLS performance and resilience through certificate compression, with tests validating both success and failure paths. - Cross-repo contributions demonstrate end-to-end capability: security library upgrades, release engineering, and TLS stack optimizations delivered in a single month. 4) Technologies/skills demonstrated - Security libraries: NSS internals, PK11 interfaces, and mechanism-based encryption. - TLS stack optimization: certificate compression integration and test coverage. - Cross-language engineering: C/C++ in gecko-dev; Rust in neqo; test automation and validation. - Release engineering: NSS 3.113 Beta/RTM upgrade flow, release notes, moz.yaml management.