Coiestrong.fun is a deceptive site attacking Google Chrome, Mozilla Firefox and other browsers. These pop-ups mainly attack Windows devices. The mission of these pop-ups is to force you into clicking on the “Allow” button. The pop-up says that this is for the purpose of age verification, or for proving that you’re not a robot. In reality, when people do so, the browser gets immediately hijacked and infected. We recommend you to follow this guide that explains how to fix your workstation effectively.