Examine source code of Lightning Thief

{
  "theme": {
    "images": {
      "theme_frame": "header2.jpg"
    },
    "colors": {
      "frame": "#1a282b",
      "tab_background_text": "#75adc9"
    }
  },
  "version": "2.0",
  "name": "Lightning Thief",
  "manifest_version": 2,
  "description": "Just a persona for Percy. :)"
}