Examine source code of PotatoWarTimer

{
  "manifest_version": 3,
  "name": "PotatoWarTimer",
  "author": "AwesomePotato [2021133]",
  "description": "See hospital timers in the faction war page",
  "version": "2.0.1",
  "content_scripts": [
    {
      "matches": [
        "https://www.torn.com/factions.php*"
      ],
      "js": [
        "js/war-timer.js"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "64": "images/icon64.png",
      "128": "images/icon128.png"
    },
    "default_title": "PotatoWarTimer",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "henrikas.budrys@gmail.com"
    }
  }
}