Examine source code of Brooklyn Sky

{
  "name": "Brooklyn Sky",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "brooklyn background.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(37, 34, 145, 1)",
      "toolbar": "rgba(0, 116, 199, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(200, 0, 26, 1)",
      "tab_line": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{088480c4-2c7e-42de-a394-63d4f3c1cdad}"
    }
  }
}