Does WebGL work for the Oculus Browser?

I tried two different WebVR demos, but they both give an error on Oculus Browser (Oculus Go, and some reported for Quest also).

The demos I tried:

https://de-panther.github.io/unity-webxr-export/Build/

https://mixedreality.mozilla.org/unity-webxr-export/Build/

The error I get:

Internal Unity error: gles::GetProcAddress("glFramebufferTextureMultiviewOVR") was called. gles::GetProcAddress() is not implemented on Unity WebGL. Please report a bug.

So anyway, my question is, does WebGL work for the browser on Oculus? Does anyone have a working demo please?

Thanks a lot!