Web browsers are strictly sandboxed environments. An extension running inside Chrome cannot access the local file system or trigger external system commands for security reasons.
To allow a browser extension to trigger high-speed multi-threaded downloads, we must establish a bridge known as a Native Messaging Host.
Standard I/O JSON Streams
Native messaging utilizes stdin and stdout pipes to pass serialized JSON payloads between the browser and a registered native application. The browser encapsulates message headers inside a 4-byte prefix representing length.
Our Rust messaging host decodes these binary payloads in microsecond timeframes, launching socket pools instantly without introducing network delay.
Strict Security Validation
To prevent unauthorized command execution, the host strictly validates the origin extension ID, ensuring only verified queries are allowed to trigger the engine.