remove "Your mouse is currently not captured by the game."
while streaming (with OBS or other such tool, not using stadia's built in streaming) it would be useful to suppress the "Your mouse is currently not captured by the game" overlay bubble, so that i can avoid transmitting it in my stream when i alt-tab away to other windows. i mucked around in the dev tools long enough to figure out it's in a div section and removing the section manually seems to do the trick (but it's randomly named and comes back next time i re-open stadia).
a similar option for suppressing the on-screen bubbles for notifications during gameplay would be nice as well... when playing destiny, if someone sends me a message, the notification bubble overlays my in-game radar... which is a great way to mess with your pals in pvp.