Comment by pjmlp

Can forget about it.

Developer tooling for debugging 3D Web APIs has been a continuous request since WebGL 1.0, from 2011.

Until now the only thing that ever came out of it was SpectorJS and it shows its age.

For a while Firefox did have a debugger, that they eventually removed from developer tools.

You are left with writing the application twice, so that can make use of modern native debugging tools for graphics programming.