Examine source code of PDF2Word PRO

{
  "manifest_version": 2,
  "name": "PDF2Word PRO",
  "version": "1.8",
  "description": "A powerful Firefox extension for PDF to Word, Word to PDF, merging, compressing, and editing PDFs.",
  "browser_action": {
    "default_title": "Open PDF2Word PRO"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab",
    "downloads",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://api.pdf.co/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shahzad14725@gmail.com",
      "strict_min_version": "109.0"
    }
  }
}