Examine source code of RafagaPrix

{
  "theme": {
    "images": {
      "theme_frame": "luz1.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#f2eded"
    }
  },
  "version": "2.0",
  "name": "RafagaPrix",
  "manifest_version": 2,
  "description": "cyco solido a q w e r t y u i o p a s d f g h j k l ñ z x c v b n  - _"
}