Examine source code of DARK FOX 3.0

{
  "name": "DARK FOX 3.0",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "58718-Mozilla_Firefox-logo-open_source-Browser-dark-fox.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(48, 52, 77, 1)",
      "bookmark_text": "rgba(27, 30, 48, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(27, 27, 36, 1)"
    }
  }
}