Examine source code of Asakura

{
  "theme": {
    "images": {
      "theme_frame": "garland.jpg"
    },
    "colors": {
      "frame": "#b6ccae",
      "tab_background_text": "#54593e"
    }
  },
  "version": "2.0",
  "name": "Asakura",
  "manifest_version": 2,
  "description": "もうすぐそこまで、春が来ていますよ！"
}