UnityWebRequestMultimedia.GetAudioClip dont't work in WebGL build (2019.3.15f1).

Hello everyone,

I tried to use the sample of code here to request an audio file in WebGL
build (in 2019.3.15f1).

But only Wav files work, and Mp3 or OGG fail to load.
I have read the limitation on my browser (Firefox) and normaly it support all this formats, but i alwais get

Streaming of ‘ogg’ on this platform is not supported.

Or mpeg.

How can I read compressed audio from SteamingAssets Folder ?
Thanks in advance.

Here the code i use:

    using System;
    using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    using UnityEngine.Networking;
    public class AudioRequest
        public AudioClip audioClip = null;
        public IEnumerator SendGetAudio(string url)
            using (UnityWebRequest www = UnityWebRequestMultimedia.GetAudioClip(url, AudioType.WAV))
                yield return www.SendWebRequest();
                if (www.isNetworkError || www.isHttpError)
                    throw new Exception(www.error + "

" + url);
audioClip = DownloadHandlerAudioClip.GetContent(www);

Doesn’t work in 2020.2a either.