Examine source code of Dawn has come.01

{
  "theme": {
    "images": {
      "theme_frame": "b-624-dawnhascome-b-067890.jpg"
    },
    "colors": {
      "frame": "#edf2f2",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Dawn has come.01",
  "manifest_version": 2,
  "description": "夜明けが訪れる。01"
}