Examine source code of pretty halloween

{
  "theme": {
    "images": {
      "theme_frame": "2.jpg"
    },
    "colors": {
      "frame": "#e0c70b",
      "tab_background_text": "#9210e3"
    }
  },
  "version": "2.0",
  "name": "pretty halloween",
  "manifest_version": 2,
  "description": "pretty halloween"
}