Examine source code of Yozakura Quartet

{
  "theme": {
    "images": {
      "theme_frame": "yozaq.jpg"
    },
    "colors": {
      "frame": "#ff6633",
      "tab_background_text": "#381616"
    }
  },
  "version": "2.0",
  "name": "Yozakura Quartet",
  "manifest_version": 2,
  "description": "Hime, Akina, Kotoha and Ao from the manga and anime Yozakura Quartet by Yasuda Suzuhito.\n\nIf you're wondering why the characters look familiar, it's because Yasuda Suzuhito has done illustrations/designs for other works such as Durarara."
}