The Firefox 13 web browser was officially released yesterday, June 5th, bringing a revamped interface and lots of other nice features, such as Speed Dial in the new tab page, revamped home page allowing quick access to settings, history, bookmarks, sessions, add-on, downloads and sync, faster browsing, faster startup, smooth scrolling enabled by default, better Page Inspector, Scratchpad, Style Editor, Style Inspector, and HTML panel, column-fill CSS property support, support for Set objects and ECMAScript 6 Map, support for CSS3 background-position property extended syntax, support for :invalid pseudo-class, support for CSS turn unit.