AnnMax — Technical Articles Full-stack developer sharing 18 years of coding experience. Browser extensions, Web Crypto, image algorithms, PWA offline architecture, WebAssembly, WebGPU, and more. https://annmax1983.github.io/ AnnMax support@annmax1983.com 2026-10-08T00:00:00Z Full-Page Screenshots in Chrome Extensions: Stitching, Fixed Elements and Memory Limits https://annmax1983.github.io/blog/full-page-screenshot-stitching.html 2026-10-08T00:00:00Z captureVisibleTab quota pacing, scroll-and-stitch with devicePixelRatio, hiding fixed headers, canvas size limits, and the CDP captureBeyondViewport alternative. TOTP from Scratch: Building an Offline 2FA Authenticator with Web Crypto https://annmax1983.github.io/blog/totp-web-crypto-implementation.html 2026-10-07T00:00:00Z Implement RFC 6238 in the browser with zero dependencies: Base32, HMAC via Web Crypto, dynamic truncation, otpauth URIs, and RFC test vectors. Perceptual Hashing in the Browser: Near-Duplicate Image Detection https://annmax1983.github.io/blog/perceptual-hash-image-dedup.html 2026-10-05T00:00:00Z DCT-based pHash in pure JavaScript: grayscale downscale, bit packing, Hamming distance, and banded indexing for whole image libraries. Parsing HTML Tables with Merged Cells: A Grid Normalization Algorithm https://annmax1983.github.io/blog/html-table-merged-cells-parsing.html 2026-10-03T00:00:00Z A grid normalization algorithm for rowspan/colspan tables, multi-row header flattening, text extraction, and CSV export that opens safely. PWA Install and Offline Caching: What Actually Works in 2026 https://annmax1983.github.io/blog/pwa-install-offline-caching.html 2026-10-02T00:00:00Z Install criteria, the beforeinstallprompt dance, iOS Safari's separate rules, versioned service worker caches, and storage persistence. Falling Sand on Canvas: Cellular Automata at 60 FPS https://annmax1983.github.io/blog/falling-sand-canvas-simulation.html 2026-10-01T00:00:00Z Uint8Array grids, bottom-up iteration, ImageData rendering, and a fixed-timestep loop — the data layout that makes 60 FPS the default. Git Beyond Commit and Push: Reflog, Bisect, Worktree and Interactive Rebase https://annmax1983.github.io/blog/git-beyond-commit-and-push.html 2026-09-16T00:00:00Z Practical Git that saves hours: recover deleted work with reflog, find the commit that broke production with bisect, and work two branches at once with worktree. Modern CSS You Probably Missed: :has(), Container Queries, @layer and Native Nesting https://annmax1983.github.io/blog/modern-css-you-probably-missed.html 2026-09-16T00:00:00Z Seven CSS features that replace JavaScript and preprocessor workarounds - with real examples you can ship today. Debugging Like a Senior Engineer: A Systematic Method That Actually Works https://annmax1983.github.io/blog/debugging-like-a-senior-engineer.html 2026-09-16T00:00:00Z Reproduce deterministically, read the whole error, cut the search space in half, work outside in, change one thing at a time, lock it in with a test. SQLite in the Browser: Building a Local-First Database with OPFS https://annmax1983.github.io/blog/sqlite-opfs-local-first-database.html 2026-09-15T00:00:00Z Run a full SQLite database in the browser using WebAssembly and OPFS. Persistent, fast, and completely offline. No server required. WebGPU in 2026: Running AI Inference and Parallel Computing Directly in Your Browser https://annmax1983.github.io/blog/webgpu-browser-ai-inference.html 2026-09-10T00:00:00Z WebGPU brings GPU-accelerated computing to the browser. Run AI models, process images, and perform parallel computation entirely client-side with WebGPU and WGSL shaders. WebAssembly Image Processing in the Browser: From Pixels to Formats https://annmax1983.github.io/blog/webassembly-image-processing.html 2026-08-20T00:00:00Z How to use WebAssembly and Canvas API to build high-performance, zero-network image processing pipelines entirely in the browser. Covers PNG, JPEG, WebP, AVIF conversion with real code examples. Browser Fingerprinting Explained: 30 Ways You're Being Tracked Online https://annmax1983.github.io/blog/browser-fingerprinting-privacy.html 2026-08-15T00:00:00Z A deep dive into browser fingerprinting techniques — Canvas, WebGL, AudioContext, font enumeration, and more. Learn how websites track you without cookies and how to defend your privacy. Local-Only Image Processing Architecture via Offscreen Documents https://annmax1983.github.io/blog/offscreen-image-processing.html 2026-07-01T00:00:00Z Zero-network image conversion, batch processing with memory management, CDP screenshots, and clipboard operations — all without a single fetch() call. Least Privilege Implementation & Chrome Web Store Review Checklist https://annmax1983.github.io/blog/least-privilege-review.html 2026-06-01T00:00:00Z activeTab dynamic injection, permission minimization, top 12 rejection reasons with fixes, and multi-browser compatibility strategies. Service Worker Resilience & State Persistence Patterns for MV3 Extensions https://annmax1983.github.io/blog/service-worker-resilience.html 2026-05-01T00:00:00Z Production patterns for handling Service Worker termination, persistent task queues, alarm-based timers, and ACK-based messaging in Manifest V3 extensions.