Examine source code of wow sundown

{
  "theme": {
    "images": {
      "theme_frame": "wowsundown.jpg"
    },
    "colors": {
      "frame": "#2c74f2",
      "tab_background_text": "#f7c96c"
    }
  },
  "version": "2.0",
  "name": "wow sundown",
  "manifest_version": 2,
  "description": "a spectacular sunset"
}