Examine source code of Saku-Chihi

{
  "theme": {
    "images": {
      "theme_frame": "Image4.jpg"
    },
    "colors": {
      "frame": "#512061",
      "tab_background_text": "#6e17b5"
    }
  },
  "version": "2.0",
  "name": "Saku-Chihi",
  "manifest_version": 2,
  "description": "Manga"
}