Examine source code of Cyberg tk

{
  "name": "Cyberg tk",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "firefox.png"
    },
    "colors": {
      "frame": "rgba(18, 53, 128, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(185, 7, 191, 0.18)",
      "bookmark_text": "rgba(204, 37, 182, 1)",
      "toolbar_field": "rgba(242, 234, 234, 1)"
    }
  }
}