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(You can check your version from Voice for Browser > Menu > About)
Two different notifications exist:
Notification inside the Voice for Browser
Desktop notification outside the browser window
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The above desktop notification requires Notifications permission for the browser. It is possible that the desktop notification is not displayed in all embedded scenarios.
Chrome and Edge browsers are preventing audio playback from a window, tab or iframe which the user hasn’t interacted with. This autoplay policy was developed by browser manufacturers to prevent unwanted audio from playing, such as audio or video advertisements.
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