Examine source code of WhatsLog

{
  "version": "1.6",
  "manifest_version": 2,
  "name": "WhatsLog",
  "description": "Whatsapp status logger by ThirtySix.",
  "browser_action": {
    "default_title": "WhatsLog",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "36.png"
    }
  },
  "icons": {
    "48": "36.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.whatsapp.com/*"
      ],
      "js": [
        "whatslog.js"
      ],
      "all_frames": true
    }
  ]
}