Examine source code of BOOTH Automatic Dark Mode

{
  "manifest_version": 3,
  "name": "BOOTH Automatic Dark Mode",
  "version": "1.0.1",
  "description": "Forces dark mode on BOOTH.pm automatically.",
  "content_scripts": [
    {
      "matches": [
        "*://booth.pm/*",
        "*://accounts.booth.pm/*"
      ],
      "css": [
        "styles/basic-dark-mode.css"
      ],
      "js": [
        "scripts/auto-dark.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "browseraddons.opposing200@passmail.net",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}