Examine source code of Fantasy Swan

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#13548c",
      "tab_background_text": "#78ffd0"
    }
  },
  "version": "2.0",
  "name": "Fantasy Swan",
  "manifest_version": 2,
  "description": "In the bird fantasy world, the Swan is the most graceful and colorful bird that swims the Galaxy..."
}