Examine source code of QSS eID

{
  "manifest_version": 2,
  "name": "QSS eID",
  "version": "2.4.2",
  "description": "Use your electronic identification card for secure authentication and digital signing.",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{9d584587-e984-4713-a239-4398e1bb30a1}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "128": "icons/qss-eid-icon-128.png"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_icon": "icons/qss-eid-icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "*://*/*",
    "nativeMessaging"
  ]
}