Examine source code of QuickZap

{
  "manifest_version": 3,
  "name": "QuickZap",
  "version": "1.2",
  "permissions": [
    "contextMenus",
    "tabs",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "message.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "quickzap@quickzap.com"
    }
  },
  "description": "Add a context menu option for opening a chat on WhatsApp"
}