Examine source code of Vote Notifier

{
  "manifest_version": 2,
  "name": "Vote Notifier",
  "short_name": "VoteNotif",
  "version": "1.2.0",
  "author": "indyteo",
  "homepage_url": "https://theoszanto.fr/",
  "developer": {
    "name": "indyteo",
    "url": "https://theoszanto.fr/"
  },
  "description": "Permet de notifier l'utilisateur lorsqu'un de ses votes sur les sites de référencement est disponible",
  "icons": {
    "48": "img/icon-48.png",
    "96": "img/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.serveurs-minecraft.org/vote.php?*id=*",
        "*://www.serveursminecraft.org/serveur/*",
        "*://www.liste-serveurs-minecraft.org/vote/?*idc=*",
        "*://serveur-prive.net/minecraft/*/vote",
        "*://serveurs-mc.net/serveur/*/voter"
      ],
      "js": [
        "scripts/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "scripts/back.js"
    ]
  },
  "web_accessible_resources": [
    "notif/light.mp3"
  ],
  "browser_action": {
    "default_icon": "img/icon-32.png",
    "default_title": "Vote Notifier",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "permissions": [
    "storage",
    "notifications",
    "https://www.serveurs-minecraft.org/",
    "https://www.serveursminecraft.org/",
    "https://api.liste-serveurs-minecraft.org/",
    "https://serveur-prive.net/",
    "https://serveurs-mc.net/"
  ],
  "applications": {
    "gecko": {
      "id": "VoteNotifier@indyteo.fr"
    }
  }
}