Examine source code of Karasoy eID

{
  "manifest_version": 2,
  "name": "Karasoy eID",
  "description": "Nitelikli elektronik sertifika (e-imza) ile web uygulamalarına güvenli giriş yapmanızı sağlar. Akıllı kart ve USB token desteği.",
  "version": "0.1.1",
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "nativeMessaging",
    "https://*.callturk.com.tr/*"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs7kW2UV7Ni8uT/ao4SfjaADZEdRS+v/D0NvMqmR8ztrAHoqU9hI2jJxKW2xrqNUdmk1S7IFQQvP8/1rubu95nCpkWmG9qc2FPK9+e07hClINWU8KF1r2AHbkH4V+z2ci+0fdStlpxWeBFFNHeToD5/P8K5vfHJqDlSD/ZLOGt+DLsKmKC1ZjOvCkDCnme3/S1PbabXZ9DVUMhhQQx08tG/RDPjV3pXmmz9CvuRjN/TuXVADWU/hv29d36+eGw1eZHfa+cDRk0sPR/H+z1Al7mYM134mupS2TRARPBGDvs8mqhx8Wq8HfDiyz9R5I8+rwtFDILRqbImYQFM5tmVPgRwIDAQAB",
  "browser_specific_settings": {
    "gecko": {
      "id": "karasoy-eid@karasoy.com.tr",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.callturk.com.tr/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}