Examine source code of gomorra

{
  "name": "gomorra",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "abstrakt154.png"
    },
    "colors": {
      "frame": "rgba(61, 66, 22, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(92, 82, 20, 0.38)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(3, 3, 3, 0.67)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(0, 255, 9, 0.29)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3fe1079b-907d-452b-9398-98ad3e081040}"
    }
  }
}