Examine source code of Chocolat

{
  "theme": {
    "images": {
      "theme_frame": "chocolat_04.jpg"
    },
    "colors": {
      "frame": "#3d1206",
      "tab_background_text": "#fcfff5"
    }
  },
  "version": "2.0",
  "name": "Chocolat",
  "manifest_version": 2,
  "description": "This persona made with sweet image of chocolate cake, cocoa drink, and melting chocolate icecream!\nI love chocolate :p\nTag：チョコ 茶 brown"
}