Examine source code of Premier Document Imaging

{
  "name": "Premier Document Imaging",
  "version": "1.7",
  "manifest_version": 2,
  "description": "Browser extension for use with Premier Document Imaging Solutions",
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pdi@twian.org",
      "strict_min_version": "50.0"
    }
  },
  "permissions": [
    "nativeMessaging",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_title": "Scan test",
    "default_popup": "scan.html"
  },
  "web_accessible_resources": [
    "scanAPI.js",
    "*.pdf",
    "*.jpg",
    "*.jpg",
    "*.txt",
    "icon.png"
  ],
  "homepage_url": "https://premierdis.com/imaging/"
}