If, like myself, you like taking screenshots of GDQ but don't want to play it in an external app to support the stream: I wrote a quick userscript that adds a screenshot button
https://gist.github.com/eramdam/377b5be7de525fe8cfd23484e1696978
Oh also you can press F9 and it does the screenshot automatically as well. It might blank out the video for some reason if you do it too many times in a short time, don't know why 🤷