Examine source code of Moniteur eniKma

{
  "description": "Affiche le statut du VPN eniKma dans la barre d'outils.",
  "manifest_version": 2,
  "name": "Moniteur eniKma",
  "version": "1.7",
  "homepage_url": "https://enikma.fr/plugin",
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "20": "icons/favicon.png"
    },
    "default_title": "Etat VPN eniKma",
    "default_popup": "popup/enikma_popup.html"
  },
  "permissions": [
    "*://192.168.75.1/*",
    "webRequest",
    "storage",
    "alarms",
    "menus"
  ],
  "options_ui": {
    "page": "config/options.html"
  },
  "background": {
    "scripts": [
      "background/enikmavpn.js"
    ]
  }
}