long-tasks

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frontend-performance / lcp-hunter

Browser overlay (MV3 extension + bookmarklet) that highlights the LCP element, render-blocking resources, and long tasks on any page, with a fix tip and deep-link for each finding. Docs on frontend-performance.com.

performance web-performance frontend bookmarklet devtools browser-extension lcp inp core-web-vitals long-tasks

Updated Jul 18, 2026
TypeScript

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