NoCoinNo coin is a tiny browser extension aiming to block coin miners such as Coinhive.
I was looking at just doing a small GreaseMonkey/TamperMonkey script just to block them all, this is a bit better in that you can whitelist if you want.
The current blacklist it uses:
*://coin-hive.com/lib*
*://coin-hive.com/captcha*
wss://*.coin-hive.com/proxy*
*://jsecoin.com/server*
*://*.jsecoin.com/server*
*://static.reasedoper.pw/*
*://mataharirama.xyz/*
*://listat.biz/*
*://lmodr.biz/*
*://minecrunch.co/web/*