Examine source code of Halloween abstract

{
  "theme": {
    "images": {
      "theme_frame": "halloweenabstract.jpg"
    },
    "colors": {
      "frame": "#a80f0f",
      "tab_background_text": "#de761b"
    }
  },
  "version": "2.0",
  "name": "Halloween abstract",
  "manifest_version": 2,
  "description": "Black and orange abstract"
}