Examine source code of Witcher 4 Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Witcher 4 Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 255, 242, 0.23)",
      "toolbar_text": "rgb(0, 255, 242)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(2, 255, 242)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(0, 255, 242)",
      "tab_line": "rgb(0, 255, 242)",
      "popup": "rgb(1, 60, 56)",
      "popup_text": "rgb(0, 255, 242)",
      "button_background_hover": "rgba(0, 255, 242, 0.49)",
      "tab_loading": "rgb(0, 255, 242)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{733ce9fc-2de5-45e8-adab-90cad47951c9}"
    }
  }
}