Examine source code of minecraft

{
  "name": "minecraft",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "untitled-a5150.jpg"
    },
    "colors": {
      "frame": "rgba(29, 44, 79, 1)",
      "tab_background_text": "rgba(191, 55, 55, 1)",
      "toolbar": "rgba(135, 135, 135, 1)",
      "bookmark_text": "rgba(196, 39, 39, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}