Chrome DevTools, Firefox DevTools, Safari Web Inspector, Edge DevTools, WebDriver BiDi (W3C, CDP 후속), Chrome AI Assistance (Gemini), Performance Insights, Recorder + Workflows, Workspace, Lighthouse 12, Lighthouse CI, PageSpeed Insights, Core Web Vitals overlay, Privacy Sandbox debugger, Animation Inspector, Memory + JS profiler, Coverage tab, Network throttling, Device emulation, CSS Overview, Source maps, Long task analyzer (INP), Puppeteer / Playwright / Cypress 그리고 한국·일본 프런트엔드 성능 엔지니어링까지 — 2026년 브라우저 DevTools 지형도를 한 번에 정리한다.