Examine source code of Sugar Clouds

{
  "name": "Head in the clouds",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "sky.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(3, 43, 224, 0.52)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(181, 75, 126, 0.7)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(180, 72, 127, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2833873c-468b-4706-8882-f77b30e4dada}"
    }
  }
}