Examine source code of Magic Dark Mode

{
  "manifest_version": 2,
  "name": "Magic Dark Mode",
  "version": "1.1",
  "description": "Магическая темная тема для всех сайтов с умной защитой глаз.",
  "permissions": [
    "<all_urls>",
    "storage",
    "tabs"
  ],
  "commands": {
    "toggle-dark-mode": {
      "suggested_key": {
        "default": "Alt+Shift+D"
      },
      "description": "Переключить темную тему"
    }
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Quick Dark Mode Settings",
    "default_icon": "icon.svg"
  },
  "icons": {
    "128": "icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "quick-dark-mode@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}