Chrome extension that turns any web page's real load performance into a live, animated X-ray — surfaces slow JS, CSS, images, fonts and API calls the moment they happen, then tucks itself into a corner badge.
chrome-extension typescript web-performance devtools data-visualization developer-tools browser-extension performance-monitoring resource-timing shadow-dom wxt performanceobserver frontend-performance playwright core-web-vitals manifest-v3 vitest performance-api
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Updated
Aug 13, 2026 - TypeScript