Examine source code of Saileach Arknights アークナイツ

{
  "name": "Saileach Arknights アークナイツ",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Saileach2.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.21)",
      "tab_line": "rgba(212, 85, 85, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cd3a1561-5718-453a-90e1-37a6dbbf88cd}"
    }
  }
}