Examine source code of Ball bearings

{
  "theme": {
    "images": {
      "theme_frame": "ballbearings.jpg"
    },
    "colors": {
      "frame": "#19bafa",
      "tab_background_text": "#1ff2bd"
    }
  },
  "version": "2.0",
  "name": "Ball bearings",
  "manifest_version": 2,
  "description": "Blue background with shiny metal balls in the foreground"
}