April 2026 monthly summary for AdguardTeam/tsurlfilter: Delivered two high-impact updates that improve privacy correctness and extension UX metrics. Implemented StealthHelper Referrer Normalization to align hidden referrer origin formatting with real browser behavior by appending a trailing slash to document.location.origin, reducing edge-case leakage in stealth operations. Fixed counting of blocked requests in frames (including cross-domain iframes) for the extension badge; added handling for prefetch requests and updated CosmeticFrameProcessor and WebRequestApi, with tests to prevent regressions. These changes were integrated with the release/browser-extension-v5.4 branch and accompanied by lint fixes and merge hygiene.

September 2025 monthly summary focused on delivering clear, business-value enhancements and improving maintainability across repositories. Key features delivered include documentation improvements for the AdGuard Browser Extension MV3 and a centralized Node.js version check during startup/build for the HostlistsRegistry. No user-facing defects were reported this month; the work included minor polish to documentation.