Monthly summary for 2026-05 (thunderbird/tbpro-add-on). Implemented upload reliability enhancements to prevent hangs and improve retries, including XHR timeout, HTTP-level retry, and presigned URL handling with S3Client configuration. Key commit: d78e36dac910b181d0f6fa2dce57983c795ce4aa.

April 2026: Pontoon authentication enhancements and robustness improvements. 1) Key features delivered: - Extended Personal Access Token (PAT) authentication support to all /api/v2 endpoints, enabling coexistence with session authentication. - Updated REST framework settings to include both PAT and session authentication as default authentication methods. - PretranslationView preserved explicit token-only authentication where applicable. 2) Major bugs fixed: - Fixed edge-case where PAT authentication raised AuthenticationFailed when no Bearer token was present; now returns None to allow fallback to session auth, aligning with DRF conventions. 3) Overall impact and accomplishments: - Improved API accessibility and security by supporting PATs alongside sessions, reducing integration friction for clients using PATs and improving robustness of auth flow across endpoints. - Centralized and simplified authentication configuration, reducing risk of misconfiguration and future maintenance costs. 4) Technologies/skills demonstrated: - Python, Django REST Framework authentication flow, REST_FRAMEWORK configuration, security-conscious design, clear commit messaging and release readiness.