Examine source code of 33WIN

{
  "name": "artistic pattern of colorful clouds",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "f124828600b355f3610e0aad2b3aceac.jpg"
    },
    "colors": {
      "frame": "rgba(81, 101, 148, 1)",
      "tab_background_text": "rgba(145, 222, 212, 1)",
      "bookmark_text": "rgba(24, 102, 94, 1)",
      "toolbar_field_text": "rgba(145, 222, 212, 1)",
      "tab_line": "rgba(24, 102, 94, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c185e315-f6ac-4220-b473-d6374c1b0431}"
    }
  }
}