Examine source code of Math Quick Quiz

{
  "manifest_version": 2,
  "name": "Math Quick Quiz",
  "version": "1.0",
  "description": "A fun mini game to practice quick math skills by solving random arithmetic questions.",
  "icons": {
    "48": "math_quiz_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Math Quick Quiz"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{716d0f19-a547-47c0-912b-6471ca25c96e}"
    }
  }
}