Examine source code of QuickZapv

{
  "manifest_version": 2,
  "name": "QuickZap",
  "version": "1.0",
  "description": "Add a context menu option for opening a chat on WhatsApp with the selected number.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b4d121d1-3171-4309-92ca-36a5a6a15962}"
    }
  }
}