Following a conversation I had and after countless cases I encountered, I decided to publish a post on how to protect yourself against this disgusting phenomenon.
There are two main reasons why I object to this:
- A site who mine Cryptocurrency on your account without your knowledge has lost its credibility.
- Usually, those sites that do not notify you, will also use your full CPU power.
My favorite first software is Avast you can download it for free
Example of identifying a connection with Coinhive mining:

Installing Chrome extensions is the easiest and quickest method to stop sites mining on your account, there are two extensions of Chrome that I suggest to install: NoCoin and MinerBlock

Two other ways I found, I haven't tried them for now. JavaScript blocker
for Chrome ScriptSafe and Firefox NoScript Security Suite

Hope this post will help you to protect more your computer, Have a great week.