Examine source code of Adverb Explorer

{
  "manifest_version": 2,
  "name": "Adverb Explorer",
  "version": "1.0",
  "description": "A captivating browser extension to practice translating Vietnamese adverbs into English, designed to enhance bilingual vocabulary skills through interactive quizzes.",
  "icons": {
    "48": "explorer_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Adverb Explorer"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f9c3e5d2-8a9e-4f6b-b2d3-7e8f9c0a6b5c}"
    }
  }
}