Examine source code of Vocab Builder

{
  "manifest_version": 2,
  "name": "Vocab Builder",
  "version": "1.0",
  "description": "A fun and interactive quiz game to enhance your Vietnamese-to-English vocabulary skills through engaging word challenges.",
  "icons": {
    "48": "vocab_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Vocab Builder"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca417760-b2fe-482c-a67f-bf7469f92cfc}"
    }
  }
}