mitmproxy : mitmproxy is your swiss-army knife for debugging, testing, privacy measurements, and penetration testing. It can be used to intercept, inspect, modify...
tracing-framework : Rich tools for instrumenting, analyzing, and visualizing web apps.
Bliss.js : Want to use Vanilla JS but find native APIs a bit unwieldy? Bliss is for you
XSS Filter Evasion Cheat Sheet - OWASP : This article is focused on providing application security testing professionals with a guide to assist in Cross Site Scripting testing.
Svelte : Svelte is a radical new approach to building user interfaces. Whereas traditional frameworks like React and Vue do the bulk of their work in the brows...
A passive reconnaissance tool inside the DOM (experimental)