Examine source code of TeleType Editor

{
  "manifest_version": 2,
  "name": "TeleType Editor",
  "version": "1.3",
  "description": "Продвинутый текстовый редактор с подсветкой синтаксиса и поддержкой медиа",
  "permissions": [
    "storage",
    "clipboardWrite",
    "downloads"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_action": {
    "default_title": "Открыть TeleType Editor",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "highlight/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "TeleTypeEditor_BlackJackBander@yandex.ru"
    }
  }
}