Examine source code of Vertigo Blue

{
  "name": "Vertigo-Blue",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "1.png"
    },
    "colors": {
      "frame": "rgba(23, 53, 92, 1)",
      "tab_background_text": "rgba(82, 165, 227, 1)",
      "toolbar": "rgb(0, 25, 36, 0)",
      "tab_selected": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "tab_text": "rgba(82, 165, 227, 1)",
      "toolbar_field": "#102550",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6659213-39dc-4e17-aef7-8242e66b0d91}"
    }
  }
}