Zoe
Push to talk in browser voice
Hold the microphone button to speak to Zoe and release to send, instead of leaving the microphone open the whole time. A separate button ends the call when you are done.
Hold with the mouse, or press and hold Space or Enter; the button pulses while you are talking. The call stays connected between turns, so you can hold again for your next question without reconnecting. Phone calls are unaffected and keep listening continuously, since there is no button to hold on a phone.