Examine source code of Custom Motorcycle

{
  "name": "Custom Motorcycle",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "6.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(235, 235, 235, 1)",
      "toolbar": "rgba(28, 28, 28, 0)",
      "bookmark_text": "rgba(235, 235, 235, 1)",
      "toolbar_field": "rgba(77, 77, 77, 0.3)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(199, 199, 199, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{54924ed2-e4bf-4375-bcdc-0413c06520ef}"
    }
  }
}