PerfLens goes beyond a one-time Lighthouse score by keeping performance feedback inside the browser while you build and test. It gives developers live Core Web Vitals, resource diagnostics, root cause summaries, per-URL history, AI-ready fix prompts, and launch evidence packs with desktop/mobile audits, screenshots, videos, and JSON reports. The goal is simple: help developers move faster from “this is slow” to “here’s what to fix next.”