Examine source code of Angry Clouds

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#333333",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Angry Clouds",
  "manifest_version": 2,
  "description": "CWA: Clouds With Attitude. The theme is based on a photo I took while in the lower Kirby district of Houston on a very windy, rainy evening (before the thunderstorm). Created with GIMP."
}