Examine source code of Devons 3000gt

{
  "theme": {
    "images": {
      "theme_frame": "devons3000gt.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#06ba2d"
    }
  },
  "version": "2.0",
  "name": "Devons 3000gt",
  "manifest_version": 2,
  "description": "devons 3000gt, 3000gt, cars, sport car"
}