Examine source code of Choo Choo Train

{
  "theme": {
    "images": {
      "theme_frame": "H.jpg"
    },
    "colors": {
      "frame": "#0c73f0",
      "tab_background_text": "#0c73f0"
    }
  },
  "version": "2.0",
  "name": "Choo Choo Train",
  "manifest_version": 2,
  "description": "children, kids, toy, toys, Christmas, travel, fun, cute"
}