Examine source code of Alien Theme (Ultrawide)

{
  "name": "Alien Theme (Ultrawide)",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "Aliens Theme.jpg"
    },
    "colors": {
      "frame": "rgba(5, 13, 66, 0.88)",
      "tab_background_text": "rgba(189, 185, 185, 0.95)",
      "toolbar": "rgba(35, 12, 99, 0.27)",
      "bookmark_text": "rgba(214, 212, 211, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.25)",
      "toolbar_field_text": "rgba(214, 211, 210, 0.6)",
      "tab_line": "rgba(82, 169, 235, 0.66)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{564a820a-c280-4677-bfc7-6372dcb24c42}"
    }
  }
}