Examine source code of Map Hunt

{
  "manifest_version": 3,
  "name": "Map Hunt",
  "version": "0.0.3",
  "description": "Map Hunt - Ищи предметы на панорамах Google Maps.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "storage",
    "downloads",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "dev.dark.dao@gmail.com",
      "strict_min_version": "114.0"
    }
  }
}