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I've been working with the voice/speech synthesis on Chrome and then I realized Firefox doesn't allow it by default and special permissions must be granted.
By reading this article I could make the test work:
https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API/Using_the_Web_Speech_API
Firefox desktop and mobile support it in Gecko 44+, without prefixes, and it can be turned on by flipping the media.webspeech.recognition.enable flag to true in about:config. The permissions settings/UI haven't yet been sorted out however, so permission can't be granted to use it by the user, so it can't be used. This will be fixed soon.
The test is in this link:
http://mdn.github.io/web-speech-api/speak-easy-synthesis/
But I wonder how I could allow it on my client's browser when they go to my app? How do we ask for different permissions and allow, for example, media.webspeech.synth.enabled?
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Chrome, Edge, Safari and Opera support a form of this API currently for Speech-to-text, which means sites that rely on it work in those browsers, but not in Firefox.
Support for Web Speech API speech recognition is currently limited to Chrome for Desktop and Android — Chrome has supported it since around version 33 but with prefixed interfaces, so you need to include prefixed versions of them, e.g. webkitSpeechRecognition .
The browser add-on is available for Internet Explorer, Chrome, and Firefox. Once the add-on is installed in your browser, you can dictate into standard HTML edit controls and use Full Text Control to select, modify, and correct your dictated text.
As an update, Speech Synthesis is enabled in Firefox 49+ (2016-09).
Work on exposing Speech Recognition to the web is ongoing as of 2019 (see bug 1248897). Update: As of 2021 the bug is closed, but the feature is still not enabled by default.
https://caniuse.com/#search=speech
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