Examine source code of Light sabre

{
  "theme": {
    "images": {
      "theme_frame": "abstractLight.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Light sabre",
  "manifest_version": 2,
  "description": "From a photo of a toy light sabre being swung around, on a slow exposure"
}