Examine source code of Lightning Strikes Twice

{
  "theme": {
    "images": {
      "theme_frame": "Lightninghead.jpg"
    },
    "colors": {
      "frame": "#f2eaea",
      "tab_background_text": "#29f2bc"
    }
  },
  "version": "2.0",
  "name": "Lightning Strikes Twice",
  "manifest_version": 2,
  "description": "Gorgeous landscape with pale green text.\nEnjoy."
}