Overlay with a small blue button to toggle&check mute status in BigBlueButton conferences
Make sure the BigBluebutton conference is running in a separate browser window or is the currently focused tab. If then, for example, the containing window has "BigBlueBlutton" in the title, simply start the overlay with
./smallbluebutton.py "BigBlueButton"
Afterwards, you can toggle your mute status by clicking the button. For more options, use the flag -h or --help.