Examine source code of Super Dark

{
  "name": "Super Dark",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled.png"
    },
    "colors": {
      "frame": "rgba(17, 17, 17, 1)",
      "tab_background_text": "rgba(204, 204, 204, 1)",
      "toolbar": "rgba(35, 35, 35, 1)",
      "bookmark_text": "rgba(239, 240, 241, 1)",
      "toolbar_field": "rgba(24, 24, 24, 1)",
      "toolbar_field_text": "rgba(0, 173, 255, 1)",
      "tab_line": "rgba(0, 173, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7fb57823-9049-42b5-88dc-75d4f38e5853}"
    }
  }
}