Examine source code of The 12th planet

{
  "theme": {
    "images": {
      "theme_frame": "12thplanet.jpg"
    },
    "colors": {
      "frame": "#82e8f5",
      "tab_background_text": "#030000"
    }
  },
  "version": "2.0",
  "name": "The 12th planet",
  "manifest_version": 2,
  "description": "Marduk's return is near"
}