 Common compatibility problems are caused by websites not following standards or using methods for detecting the browser being used.To cope with outdated detection methods or poorly built websites, Opera enables users to change the information that is sent to websites to identify what kind of browser is being used—known as the user-agent.In previous years, Opera came preconfigured to partially "cloak" itself as Internet Explorer, but still included the word "Opera" in the user-agent information allowing the browser to be counted in web browser statistics.