Examine source code of Ferran Feliu

{
  "theme": {
    "images": {
      "theme_frame": "firefox.jpg"
    },
    "colors": {
      "frame": "#8ad6ed",
      "tab_background_text": "#040445"
    }
  },
  "version": "2.0",
  "name": "Ferran Feliu",
  "manifest_version": 2,
  "description": "Hecho a partir de una de mis pinturas, espero que os gust"
}