In a rather smart move (to take advantage of the great news stream?), Mozilla has gone ahead and released Firefox 13 a day early. It features new tab and homescreen designs. The homescreen offers downloads, bookmarks, previous session, history, sync settings, and general app settings. Lastly, opening a new tab brings up a grid view of commonly-visited sites, just like Safari and Chrome have done for many, many years now. Download the new Firefox at the source links.