Examine source code of Doomscroll Reminder

{
  "manifest_version": 2,
  "name": "Doomscroll Reminder",
  "version": "1.0",
  "description": "Nhắc nhở khi cuộn quá nhiều để hạn chế doomscrolling.",
  "permissions": [
    "notifications"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "doomscroll-reminder@example.com"
    }
  }
}