Currently Edge (81.0.381.0) is behaving strange when using the Web Speech API for speech recognition. The interface exists, but does not work AND does not throw any error.
Here is a quick code example:
var rec = new window.webkitSpeechRecognition();
rec.onresult = console.log;
rec.onerror = console.error;
rec.start();
Are there any plans to either:
a) Fully implement the speech recognition part or ...
b) ... throw proper errors?
Since Microsoft is already using speech recognition in Windows, has the technology for offline and online ASR and has the cloud architecture it should be no big deal to fully support it right? 
It would be really great to finally get a 2nd browser that actually has a working implementation of the API (Google is doing it for 6 years now since Chrome 33).
"C:\Users\AppData\Local\Microsoft\Edge SxS\Application\msedge.exe" --enable-features=msSpeechRecognition
i try it and open "https://www.google.com/intl/en/chrome/demos/speech.html"
it's not work
Am I using the correct command?
Thanks for the info! With this command its actually kind of working now in the latest Canary build
The strange thing is that I'm getting an intermediate result but the final result triggers a "network" error again.
I've updated my own app for testing: S.E.P.I.A. Open Assistant (sepia-framework.github.io)
You can try it yourself by extending the login box and choosing "continue without login". The microphone button is the circle at the bottom ;) errors will be shown in the console and chat view.
I'll use the integrated Edge feedback feature to send a bug report as well.
I'm getting the same error. I think this page has some unrelated issues :\
You can try my own app I've linked above for a more up-to-date implementation :)