Examine source code of disco elysium

{
  "name": "disco elysium",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled.jpg"
    },
    "colors": {
      "frame": "rgba(61, 100, 191, 1)",
      "tab_background_text": "rgba(44, 52, 61, 1)",
      "toolbar": "rgba(158, 158, 217, 1)",
      "bookmark_text": "rgba(44, 52, 61, 1)",
      "toolbar_field": "rgba(232, 179, 151, 1)",
      "toolbar_field_text": "rgba(44, 52, 61, 1)",
      "tab_line": "rgba(44, 52, 61, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ec664701-9813-4b6a-9895-5ee8952fb022}"
    }
  }
}