Lichess now has the feature built-in! Enable it at the bottom of https://lichess.org/account/preferences/game-behavior.
### UPDATE - THIS IS NOW DEPRECATED ###
Lichess now has the feature built-in! Enable it at the bottom of https://lichess.org/account/preferences/game-behavior
And remove this userscript! Thanks all for doing the right thing and saying "Good game, well played".
