Examine source code of GTX

{
  "name": "GTX",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "pc-gaming-hd-wallpapers-33488-3369299.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(161, 161, 161, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(21, 140, 0, 1)",
      "toolbar_field_text": "rgba(5, 255, 38, 0.43)"
    }
  }
}