Fake add-on/extension scam is here to stay: Whitney Houston and Whitney Houston are latest victims of fake add-ons. Scam is a classic example of a fake extension scam. As you supposedly don`t have the latest YouTube Player version installed, you need to get it before you proceed. Instead of an update, you end up with an unverified add on: Quiz Maze Unlimited. If you don’t have latest version of YouTube Player, you get your own version of the scam: You end up in a fake version: You need to remove it from your browser: Firefox and Chrome.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/scavengers-assault-social-networksagain/