NoMiner - Block Coin Miners is an addon for browsers. 

If you don't want your computer resources to be used for mining cryptocurrencies, just install NoMiner - Block Coin Miners on your browser. You will find the list of blocked domains on the options page.

Features:

Blocked websites

Easily block crypto-coin mining websites. 

Add or remove websites from the list. 

Check whether the addon is on or not. 

Set it to ON|OFF. 

Change the icon color.