Examine source code of PDF Merge Files

{
  "manifest_version": 2,
  "name": "PDF Merge Files",
  "version": "1.0.1",
  "description": "Quickly merge, combine, and manage your PDF files with pdfmergefiles.com",
  "author": "PDF Merge Files",
  "homepage_url": "https://pdfmergefiles.com",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    },
    "default_title": "PDF Merge Files",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@pdfmergefiles.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}