Loon

Loon is a powerful Chrome extension designed to give you full control over your network debugging and proxy workflows. It supports multiple protocols (ss, ssr, vmess, trojan, vless, HTTP/S, SOCKS5, hysteria2, Shadow-TLS, WireGuard) and can route all HTTP/HTTPS/TCP/UDP traffic through a proxy for deep inspection. It can log request and response headers and bodies, and even perform MITM over HTTP/2 for advanced debugging.

Its features include granular routing rules based on domain, URL, IP, protocol, port, and HTTP headers; robust ad-blocking with custom rules and scripting; DNS capabilities with IPv6, asynchronous DNS, and DNS over HTTPS/QUIC/HTTP3; traffic usage monitoring; and a JavaScript extension pathway to tailor proxy behavior. Perfect for developers and power users who need full visibility and control.