Examine source code of System Automater

{
  "manifest_version": 2,
  "name": "System Automater",
  "version": "1.0",
  "description": "Data manipulate between multiple Systems",
  "icons": {
    "48": "assets/img/icon_48.png"
  },
  "browser_action": {
    "default_icon": "assets/img/icon_48.png",
    "default_title": "System Automater",
    "default_popup": "popup.html"
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "assets/js/jquery-3.6.1.min.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "system@automater"
    }
  }
}