Examine source code of NextLevelWallpapers

{
  "theme": {
    "images": {
      "theme_frame": "Tryout4.jpg"
    },
    "colors": {
      "frame": "#d1d1d1",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "NextLevelWallpapers",
  "manifest_version": 2,
  "description": "Visit NextLevelWallpapers.weebly.com for free, creative desktop backgrounds."
}