Examine source code of WhatsApp Chart Starter

{
  "manifest_version": 2,
  "name": "WhatsApp Chart Starter",
  "version": "1.0",
  "description": "Quickly open a WhatsApp Web conversation by entering a phone number.",
  "icons": {
    "48": "icons/whatsapp-48.png",
    "96": "icons/whatsapp-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "whatsapp@volkker.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "ppiExempt": true
      }
    }
  },
  "browser_action": {
    "default_icon": "icons/whatsapp-48.png",
    "default_title": "WhatsApp Opener",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs"
  ]
}