Examine source code of Hctuan Live Alert

{
  "manifest_version": 3,
  "name": "Hctuan Live Alert",
  "description": "Rejoins moi en live à tout moment !",
  "version": "2.0",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "64": "/img/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "FirefoxWebExtension@hctuan.fr"
    }
  },
  "permissions": [
    "alarms",
    "notifications"
  ]
}