Examine source code of Wizztodon

{
  "manifest_version": 2,
  "name": "Wizztodon",
  "version": "1.7.1",
  "description": "Le Wizz de MSN Messenger sur Mastodon ! 💥",
  "icons": {
    "96": "icons/wizztodon-96.png"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "wizz.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "96": "icons/wizztodon-96.png"
    }
  },
  "web_accessible_resources": [
    "sounds/wizz.mp3"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{483d6301-ebf9-4a77-8675-ddcaac9bdeb3}"
    }
  }
}