Oproxy lets you inspect and modify network traffic directly from the browser

Saurav Rao's Oproxy is an open-source proxy tool that brings traffic inspection and modification into the browser itself, skipping the usual desktop-app setup that tools like Burp Suite require. For indie developers debugging APIs or testing request flows, having that workflow live in the browser lowers the friction considerably. It's an early-stage project worth watching if you spend time poking at HTTP traffic.