Examine source code of Sunset Play

{
  "name": "Sunset Play",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "SunsetPlayH2.jpg"
    },
    "colors": {
      "frame": "rgba(191, 135, 63, 1)",
      "tab_background_text": "rgba(255, 251, 189, 1)",
      "toolbar": "rgba(194, 140, 64, 0)",
      "bookmark_text": "rgba(255, 253, 196, 1)",
      "toolbar_field": "rgba(194, 140, 64, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 240, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{30c7cba5-4515-43d9-869a-0bdeb6e98f3d}"
    }
  }
}