Examine source code of Language Quiz

{
  "manifest_version": 2,
  "name": "Language Quiz",
  "version": "1.0",
  "description": "Generate vocabulary quizzes based on words on the page.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "Start Language Quiz",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{31f929e3-506a-4add-a723-fdc8bcae6f51}"
    }
  }
}