Examine source code of Connective signing extension

{
  "manifest_version": 3,
  "default_locale": "en",
  "name": "Connective signing extension",
  "description": "This extension allows for document signing",
  "version": "1.0.13",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": "icon48.png",
    "default_title": "Connective Browser Extension",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f643bc8-78f5-49c6-8efd-78ee30289f0b}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "nativeMessaging"
  ],
  "host_permissions": [
    "*://signid-activationservice.sign.gonitro.com/*"
  ]
}