Examine source code of NightRider-Animated

{
  "theme": {
    "images": {
      "theme_frame": "NightRider.png"
    },
    "colors": {
      "frame": "#d4cccc",
      "tab_background_text": "#f5f0f0"
    }
  },
  "version": "2.0",
  "name": "NightRider-Animated",
  "manifest_version": 2,
  "description": "I drew this witch animations years ago. I think it looks great.  I hope you do.\nNightRider.   A witch riding a broom in the full moon light with gentle passing breezes dancing with her hand, broom and skirt."
}