Firefox installs with just the essentials: a built-in pop-up blocker, a slick file-download manager, and a customizable search box in the browser toolbar. Also included are easy-to-understand privacy controls, a tabbed browsing to keep multiple Web pages open, and the capability toolbar. Also included are easy-to-understand privacy controls, a tabbed browsing to keep multiple Web pages open, and the capability to block many HTML-based banner ads.