Examine source code of Cloudy at night

{
  "name": "Cloudy at night",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "temp9.png"
    },
    "colors": {
      "frame": "rgba(32, 48, 61, 0)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(39, 1, 71, 0.52)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(49, 3, 102, 0.42)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(184, 181, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2feaa8c2-9667-4587-934b-00d07387bc56}"
    }
  }
}