The Joga's Firefox extension is up: http://www.mozilla.com/add-ons/jogacompanion/

From the website:

   * Stay up to date with the latest scores, see videos of the best goals, and talk about the 2006 World Cup with fellow fans.
   * Downloads in minutes, installs in seconds, and keeps all your existing bookmarks and settings
   * Get all the football action you can handle using Firefox's tabbed browsing and integrated search.
   * Show support for your favorite team by changing the browser's look and feel.