Examine source code of WhatsLogger

{
  "version": "1.2",
  "manifest_version": 2,
  "name": "Whatsapp Status Logger",
  "description": "made with love by Jan",
  "icons": {
    "64": "whatsapp.png"
  },
  "background": {
    "scripts": [
      "main.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.whatsapp.com/*"
      ],
      "js": [
        "jquery-3.4.1.min.js",
        "main.js"
      ],
      "all_frames": true
    }
  ]
}