Depending on what you’re doing, the browser might use QUIC for streaming, WebTransport for low-latency data, or even WebRTC data channels for peer-to-peer assets (e.g., in a mesh CDN scenario).

If you are looking for the technical framework rather than the user-facing proxy:

None are true Scramjet browsers, but they reduce the "moving parts" delay.

Scramjet. An engine that breathes speed. Finally, a browser that didn’t wait for permission to fly.

: Designed to be high-speed and capable of acting as middleware for other open-source projects. Getting Started