Examine source code of WhatsApp Group Manager

{
  "manifest_version": 2,
  "name": "WhatsApp Group Manager",
  "version": "1.0",
  "description": "A simple add-on to manage WhatsApp group names for quick access.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{58d12ae1-7efc-4151-b0cb-2a0951102922}"
    }
  }
}