GNOME now offers shell extensions the mozilla way. You can download and install these extensions as you do with the Firefox Addons. Gnome has recently launched the shell extensions website, bracing itself to compete with Unity desktop.
Canonical has released Ubuntu In-Vehicle Infotainment (IVI) Remix Beta 2 on December 21. The Ubuntu IVI Remix is a specific version of Ubuntu operating system based on a core set of Ubuntu technologies that will deliver infotainment in your car.