Examine source code of School Kids Playing

{
  "theme": {
    "images": {
      "theme_frame": "firefoxpersonakidsonmonkeybars.png"
    },
    "colors": {
      "frame": "#0a0f40",
      "tab_background_text": "#0a0f40"
    }
  },
  "version": "2.0",
  "name": "School Kids Playing",
  "manifest_version": 2,
  "description": "School kids playing on monkey bars. There is a school building and a school bus in the background. Kids have fun."
}