Examine source code of Roblox Dark Mode Theme

{
  "name": "Roblox Dark Mode Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "wdadadad.png"
    },
    "colors": {
      "frame": "rgba(18, 18, 21, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(52, 55, 64, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(18, 18, 21, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(32, 34, 39, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca159cbc-2b62-4e3d-9f87-cd057383df61}"
    }
  }
}