Examine source code of Shrek Firefox

{
  "theme": {
    "images": {
      "theme_frame": "header_shrek2011.jpg"
    },
    "colors": {
      "frame": "#a6bee0",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Shrek Firefox",
  "manifest_version": 2,
  "description": "Shrek The Musical, Shrek 2, Shrek The Third, Shrek Forever After.\nAn ogre, in order to regain his swamp, travels along with an annoying donkey in order to bring a princess to a scheming lord, wishing himself King."
}