Makes Space into a Push-to-Talk button, makes Shift a PTT for the camera, and makes Enter a shortcut to the chat window.
These Local Storage parameters (stored under https://meet.google.com) configure the keys for each of the buttons above. Refer to the MDN article on Key Values to configure each. You can configure these parameters using the Local Storage editor in your browser's developer tools. An options panel is TODO.
GMPTT_microphoneKey: Button for microphone PTT, default: " " [space character]GMPTT_cameraKey: Button for camera PTT, default: ShiftGMPTT_chatKey: Button to open chat menu default: Enter