Examine source code of VKEncrypt

{
  "manifest_version": 3,
  "name": "VKEncrypt",
  "version": "0.5.3",
  "author": "Nick",
  "description": "Расширение для шифрования личных сообщений социальной сети ВКонтакте",
  "web_accessible_resources": [
    {
      "resources": [
        "icons/key.png",
        "icons/lock.png",
        "icons/unlock.png",
        "icons/newkey.png"
      ],
      "matches": [
        "https://*.vk.com/*",
        "https://*.vk.ru/*"
      ]
    }
  ],
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png",
    "176": "icons/icon176.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.vk.com/*",
        "https://*.vk.ru/*"
      ],
      "js": [
        "jquery-3.3.1.slim.min.js",
        "sha/sha256.js",
        "aes-js/index.js",
        "base64/base64js.min.js",
        "encoding/encoding.js",
        "scrypt/scrypt.js",
        "scrypt/thirdparty/unorm.js",
        "scrypt/thirdparty/buffer.js",
        "scrypt/thirdparty/setImmediate.js",
        "keyexchange/jsbn.js",
        "keyexchange/jsbn2.js",
        "keyexchange/prng4.js",
        "keyexchange/rng.js",
        "keyexchange/ec.js",
        "keyexchange/sec.js",
        "configuration.js",
        "vkencrypt.js",
        "header-module.js",
        "text-module.js",
        "pre-module.js",
        "presend-module.js",
        "storage.js",
        "encrypt-module.js",
        "time-module.js",
        "navigation-module.js",
        "keyexchange-module.js",
        "error-module.js"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon20.png",
      "19": "icons/icon19.png",
      "20": "icons/icon20.png",
      "24": "icons/icon38.png",
      "32": "icons/icon38.png",
      "38": "icons/icon38.png",
      "40": "icons/icon40.png",
      "48": "icons/icon48.png"
    },
    "default_title": "Справка",
    "default_popup": "help.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{121b704a-43d5-4bf5-8ed1-69196d8141c3}"
    }
  }
}