If you use Facebook and you also own crypto currencies, your user name and passwords on crypto exchanges may already be known to hackers. Trend Micro said in a blog post that the Chrome web browser’s extensions “were made over” to steal user credentials for Google, MyMonero, and Coinhive. The bottom line is that it promotes a scam that dupes users into sending ether to the attacker’s wallet and drains a computer’s processing power to power clandestine cryptocurrency mining.
This might not be confined to only ether. Check your crypto currency wallets’ balances carefully. While you are at it, change your passwords!
Details may be found in an article by Annaliese Milano in the CoinDesk web site at: http://bit.ly/2KwBWRQ.