Examine source code of Storm Showers

{
  "name": "Storm Showers",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "proxy.duckduckgo.com.jpg"
    },
    "colors": {
      "frame": "rgba(167, 183, 219, 1)",
      "tab_background_text": "rgba(22, 92, 54, 1)",
      "toolbar": "rgba(7, 38, 122, 1)",
      "bookmark_text": "rgba(43, 179, 131, 1)",
      "toolbar_field": "rgba(193, 223, 235, 1)",
      "toolbar_field_text": "rgba(5, 5, 5, 1)"
    }
  }
}