Examine source code of Window Lantern

{
  "theme": {
    "images": {
      "theme_frame": "windowlanternheadersmaller2.jpg"
    },
    "colors": {
      "frame": "#896897",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Window Lantern",
  "manifest_version": 2,
  "description": "A girl holding a lantern out the window at night. Blue and purple colors."
}