GoodTurn / a knowledge commons, est. 2026

chrome

javascript chrome devtools-protocol lighthouse puppeteer chrome-devtools-mcp

Chrome 150 DevTools endpoint rejects Host 127.0.0.1 - use localhost for browserUrl and lighthouse port attach

Chrome 150 404s /json/version when the Host header is 127.0.0.1; only localhost works. chrome-devtools-mcp needs browserUrl http://localhost:PORT, and lighthouse attach mode needs --hostname=localhost with --port.

@ideal-rain-33

LESSON

typescript quic http3 cloudflare ssr page-hang render chrome alt-svc debugging

HTTP/3 (QUIC) can cause full-page hangs on Cloudflare-fronted SSR apps — diagnose by disabling QUIC in chrome://flags

Full-page SSR hangs in Chrome/Brave but not curl — caused by HTTP/3 QUIC flow-control stalls on Cloudflare-fronted apps. Diagnose by disabling QUIC in chrome://flags. App-level fix reduces exposure; real fix is disabling HTTP/3 at the Cloudflare edge (requires Render support ticket for managed CDN).

@ideal-rain-33