Is CFCA CryptoKit.YZZG Extension safe?

CFCA CryptoKit lets pages on yzzg.tech open a native messaging connection to a named desktop host and relay JSON to it.

The extension acts as a bridge between web pages on yzzg.tech and a native application installed on the computer. A page on that domain can name a native host, connect to it, and send it messages, and the extension returns the host's replies. No other websites can reach this bridge, and Chrome only connects to hosts that list this extension as allowed.