April 2026 (mdn/content) monthly summary: Delivered a comprehensive Threat Modeling Guide for Web Applications, including frameworks, example threat models, and explanations of trust boundaries and threat responses to help developers identify and mitigate security risks. Expanded the initiative with a threat model for the CycleTracker PWA and introduced targeted documentation improvements across the TM materials. The work advances secure-by-design thinking, aligns with security best practices, and strengthens the MDN content as a trusted reference for developers.

March 2026: Implemented Meta Quest XR WebXR compatibility improvements and plane detection enhancements in the MDN browser-compat-data repository. Updated Oculus data with new WebXR features, refined plane detection properties, and corrected release info and spec URLs to improve accuracy.

February 2026 monthly performance summary focused on delivering developer-facing capabilities and strengthening cross-browser compatibility data. Key outcomes include enabling digital credentials issuance workflows, expanding API coverage in browser compatibility data, and refreshing data accuracy across multiple web APIs and browser versions. These efforts improve platform readiness for upcoming browser releases and provide reliable data for developers and partners.

January 2026: MDN browser-compat-data Focus: governance hygiene, API-data accuracy, and expanding performance and compatibility coverage to strengthen developer trust and reduce maintenance overhead. Key features delivered: - Project Governance and API Documentation Cleanup: Reinstated Daniel Beck as BCD co-owner and removed deprecated Window.sizeToContent() to prevent confusion and outdated API references. Commits: 7063edcd4cd9998f8b5e023757eef7e51271ab8f; 5ebc383f4b8b2bb7e9b2b15cfb6644ceb7021358. - PerformanceResourceTiming API: service worker timing getters: Introduced new timing getters for service workers to improve accuracy of performance measurements. Commit: bf1c899bb1184502fe139b5ee6cd16e4809505d1. - DedicatedWorkerGlobalScope: rtctransform event support (Chromium 141): Added support for the rtctransform event to align with Chromium 141. Commit: 184e2ff309665b47da19691576fa0cc65b928516. - Web API compatibility data updates (browsers/versions): Updated data across Firefox, Safari, and Chromium to reflect current support, including new features, status changes, and deprecations. Commits include: ffb1a0799d39c4811053992e3e08c37061cc0916; 962f06678bb0080d303137d908e3594f1036f901; 2a77b3be6b82ea09290b0b9f1a36da51e649d72e; 4717df8bacf294513af89f63560a11cef0eddcbe; cd3201dad002c7db83ae04fdeeaa250fd3d0a416; ce8c1e6f0e4c4d397d79710b2f21eda650c7d75d. Major bugs fixed: - Cleanup of deprecated API: Elimination of Window.sizeToContent to reduce legacy maintenance burden and prevent confusion in API data. Overall impact and accomplishments: - Strengthened governance alignment and data cleanliness, ensuring reliable, up-to-date compatibility data for developers. - Expanded performance measurement capabilities (service worker timing) and kept pace with Chromium feature releases (rtctransform). - Delivered comprehensive compatibility updates across major engines, reducing risk of misinformed development decisions. Technologies and skills demonstrated: - Cross-browser API modeling and data maintenance, version-specific feature tracking, and proactive deprecation cleanup. - Git discipline, code review awareness, and collaboration across teams to coordinate ownership changes and data updates. - Performance instrumentation readiness and feature adoption planning for upcoming browser releases.

December 2025 monthly summary for mdn/browser-compat-data: Focused on WebAssembly enhancements and cross-browser data accuracy to accelerate feature adoption and reduce integration risk. Delivered Firefox 145 WebAssembly resizable array buffers with new APIs and refreshed compatibility data across major engines (Chrome, Firefox, Safari, Edge), aligned with latest releases and experimentation, and demonstrated strong collaboration and data governance.

Month 2025-11: Delivered comprehensive OTP Authentication Documentation in mdn/content, covering email, SMS, and TOTP implementations; detailed mechanisms, strengths/weaknesses, best practices, otpauth URI format, and WebOTP API. Editorial refinements were made to email/SMS sections and enhanced TOTP explanations. No major bugs fixed this period. The work involved cross-team collaboration and co-authorship, contributing to improved developer onboarding, security awareness, and consistency across MDN docs.

October 2025 MDN monthly summary: Delivered key browser-compat data updates and new educational content, reinforcing data accuracy, API coverage, and developer education. Key features include Chrome 142 Beta and Firefox 145 Beta data updates in mdn/browser-compat-data and Safari 18.4 Declarative Push API support, plus a new JavaScript prototype pollution attack guide in mdn/content. A bug fix cleaned up supply chain attacks content for clarity. These efforts enhance cross-browser reporting, broaden API support, and provide practical security guidance, demonstrating solid data curation, documentation, and cross-repo collaboration.

September 2025 performance summary: Delivered major browser-compatibility and documentation improvements across two MDN repos (mdn/browser-compat-data and mdn/content). Key features included comprehensive Browser Compatibility Data and CSS updates across Chrome, Firefox, and Edge, including new CSS values span-left/span-right and corner-shape subfeatures; FederatedCredential data model stabilization (iconURL/name adjustments via spec_urls); Safari test alignment for Notification.navigate; and extensive Federation API/security documentation enhancements. Major bugs fixed encompassed removing the Error API from CredentialsContainer.get to simplify flow and fix edge-case behavior, plus adjustments to FederatedCredential constructor options and API return expectations in related docs. Overall impact: higher data accuracy, standards-aligned surface areas, reduced risk, and clearer developer guidance, enabling faster integration of new web platform capabilities. Technologies/skills demonstrated: cross-browser data modeling, standards-driven API design, security documentation, test-driven QA, and collaborative commits across MDN repos for improved developer experience.

Month: 2025-08 — Delivered critical data quality improvements and API/data coverage enhancements across MDN repos, with a focus on business value for developers relying on browser compatibility data and documentation. Key outcomes include removal of obsolete CSS data, granular CSS feature coverage, updates to browser API compatibility entries, and expanded developer documentation and FedCM accounts support. Demonstrated strong data curation, cross-repo collaboration, and adherence to contribution guidelines.

Month 2025-07 performance summary: Focused on delivering developer-facing documentation and compatibility data updates across mdn/content and mdn/browser-compat-data. Key features delivered across web platform APIs include: VideoFrame API orientation controls via VideoDecoder.configure; Canvas colorType and cross-context sync; ImageData pixelFormat docs; XRSession.enabledFeatures; URLPattern.hasRegExpGroups; MediaSession.setScreenshareActive and togglescreenshare; HTML case-insensitive enumerated attributes. Browser-compat-data expanded coverage for new features and standards references (including Deno URLPattern.hasRegExpGroups and ignoreCase; Safari 18.4 inputs with alpha/colorspace; Safari anchor() and anchor-size; Firefox WebGPU support; Selection APIs in shadow DOM; Chrome 138 CSS sign(); MDN URLs and spec URLs; ECMAScript spec URL stability; CSS background-repeat-x/y). No major bugs fixed were recorded this month; emphasis was on documentation quality, usage guidance, and data coverage to improve developer experience and platform reliability. Overall, this work increases MDN's accuracy and usefulness as a reference, accelerates onboarding for new developers, and strengthens alignment with evolving web standards.

June 2025 monthly summary for the mdn/browser-compat-data repository focused on strengthening cross-browser compatibility data and stabilizing browser API coverage across Safari, Firefox, and Chrome. The work reduced risk in downstream tooling and documentation, and improved accuracy for developers relying on up-to-date support matrices.

May 2025 performance summary for the mdn/browser-compat-data repository. Key features delivered: - CSS Properties and Typography Compatibility Data Improvements: expanded coverage for font-synthesis oblique-only, text-combine-upright, font-kerning, empty-cells, table-layout, and related values (normal/auto) across multiple properties. Representative commits include Firefox 137 support for font-synthesis-style: oblique-only, addition of text-combine-upright, font-kerning variants, empty-cells variants, and table-layout variants, plus alignment/value specs (e.g., text-underline-position auto). - Browser Version Compatibility and API Support Updates: updated compatibility data for Firefox 140 beta, Chrome 138 beta, and Firefox 139 beta; added Temporal.PlainDateTime support for Firefox 139. - Developer Tooling: Linter Exceptions for WebAssembly/js-promise-integration: added a linter exception to ensure correct handling of related URLs during compatibility data updates. Major bugs fixed / data quality improvements: - Resolved data gaps and inconsistencies in CSS typography and layout property coverage; ensured Temporal.PlainDateTime and credential-related feature data reflect upcoming browser versions. - Reduced false positives in linting around WebAssembly/js-promise-integration by introducing targeted exceptions. Overall impact and accomplishments: - Significantly widened and stabilized compatibility data coverage, enabling downstream tooling and MDN pages to reflect current and upcoming browser capabilities more accurately. - Streamlined update cycles for major browser version bets (Firefox/Chrome) and API support, accelerating release readiness for developers relying on MDN data. Technologies / skills demonstrated: - Data modeling and curation for cross-browser compatibility data, commit-driven development across multiple features, and integration of lint tooling improvements to enforce data quality. - Collaboration across browser versions (Firefox/Chrome) and web standards with practical impact on developer tooling and documentation.

Concise monthly summary for MDN/browser-compat-data (April 2025). Focused on delivering accurate, versioned browser compatibility data and improving developer experience across major engines. Key data updates and targeted cleanups enhanced docs reliability and reduced ambiguity for feature flagging and testing.

Concise monthly summary for 2025-03: Focused on delivering data updates and cross-browser compatibility coverage in the mdn/browser-compat-data repository. Key outcomes include alignment with Firefox 137 beta and Chrome 135 beta releases, including Atomics.pause support, and expanded SVG Path coverage to improve cross-browser accuracy. These updates enhance data reliability for developers and MDN content, enabling safer feature adoption in upcoming releases.

February 2025 (2025-02): Delivered comprehensive browser compatibility data updates for Chrome 134, Firefox 136 beta, and Safari 18.4 beta, including keyword support and feature changes to support reliable developer reporting. Expanded coverage with Chrome 134 SharedStorageWorkletGlobalScope.interestGroups API and introduced new JavaScript built-ins (Explicit Resource Management) plus the Error.isError static method. Addressed data gaps and regression issues uncovered during beta testing to ensure up-to-date, cross-browser feature availability. The work strengthens MDN browser-compat-data quality, enabling better decision-making and faster feature adoption for developers.

January 2025 performance summary focusing on browser compatibility data updates, tooling improvements, and deprecation work across the MDN repos. Delivered substantive updates to browser-compat-data (BCD) and web tagging workflows, improved data quality controls, and completed deprecation work for portal docs, driving maintainability, accuracy, and developer confidence in API support signaling.

December 2024 monthly summary for mdn/browser-compat-data: delivered feature improvements, fixed critical browser compatibility bugs, and performed extensive data maintenance to keep the dataset aligned with evolving browser behavior. Focus areas included WebAssembly feature support, Chrome 115 fencing frame sandbox, and expanded offset-motion coordinate handling, complemented by Safari compatibility stabilization and data cleanup to ensure accuracy for developers and downstream tooling.

November 2024 monthly summary for mdn/browser-compat-data: Delivered cross-browser compatibility updates, privacy-standard integration, and data hygiene improvements. Highlights include WebGPU updates (Safari 18.2 beta) with tagging and rollback; broad Safari/Chrome/Edge data maintenance; Global Privacy Control (GPC) spec entry; CSS/HTML compatibility enhancements; and NavigateEvent rename cleanup with test-spec URL updates. Result: higher data accuracy, safer feature rollouts, and stronger privacy standards.

Concise monthly summary for 2024-10 focusing on contributions to mdn/browser-compat-data. Delivered three key features, implemented notable data updates, and refactored rendering architecture to improve maintainability and performance. Emphasizes business value through accurate compatibility data, expanded data management capabilities, and a modular codebase for easier future work.