.NET uses a special CDP-based debug proxy that handles messages from three different actors: a CDP-based debugger frontend, WASM Mono runtime, and the browser.
This viewer allows discovering additional non-documented pieces that are provided by debug proxy for debugger frontend for handling Mono or .NET-specific features.
Warning: There are no official specifications of such a protocol extension. It could be changed frequently and without notice, so please use carefully.
Useful links:
mono_wasm_protocol.json: unofficial protocol extension JSON specification- Mono WASM Proxy Sources
Based on the excellent Minimalistic DevTools Protocol Viewer by aslushnikov.