@leocg it is supported but the thing is it doesn't fire. Webkit browsers have an alternative to speechRecognition which is webkit.speechRecognition and as you know, Opera is webkit based so it Should work but it doesn't
Latest posts made by SuyashDl12
RE: SpeechRecognition API doesn't fireOpera for Windows
SpeechRecognition API doesn't fireOpera for Windows
caniuse.com also says that Opera does have support for SpeechRecognition but it doesn't fire.