Push notifications are being added to the arsenal of PUPs, adware, and even a Trojan browser extension that spams Facebook groups. Malwarebytes flags extensions for misconduct but recognizes they offer some kind of functionality and are upfront about the fact that they will change your search settings. The extensions in this family are search hijackersthey redirect users to Yahoo! search results when searching from the address bar. The extension performs a check to see whether the user is connected to some Facebook groups if they are logged in.”]