Examine source code of macOS Safari

{
  "name": "macOS Safari",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Zrzut ekranu 2022-09-7 o 18.24.48.png"
    },
    "colors": {
      "frame": "rgba(30, 30, 30, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(40, 40, 40, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{91dc83f8-b383-4ec5-a2ea-6c934eac45ec}"
    }
  }
}