Examine source code of Yokey Live Notifier

{
  "manifest_version": 3,
  "name": "Yokey Live Notifier",
  "version": "1.4",
  "description": "Ne manque plus aucun de mes lives : notifications, accès rapide à tous mes réseaux et la programmation des streams.",
  "icons": {
    "16": "icons/live16.png",
    "48": "icons/live48.png",
    "128": "icons/live128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/offline16.png",
      "48": "icons/offline48.png",
      "128": "icons/offline128.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "https://yokey.fr/*"
  ],
  "externally_connectable": {
    "matches": [
      "https://yokey.fr/*"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "yokey-live-notifier@yokey.fr",
      "strict_min_version": "128.0"
    }
  }
}