AdBlock Ultimate for Chrome is a free browser extension for Google Chrome, which automatically blocks adverts. It is simple to install, works automatically and blocks video ads, banner ads and even adverts on social media sites like Facebook. Unlike many other extensions and applications of this type, it does not come with a built-in list of 'acceptable' or 'white-listed' ads, providing more comprehensive ad blocking as a result. However, a small number of ads may avoid detection and the extension does very occasionally produce a pop-up of its own, asking for feedback, although even this is relatively unobtrusive.