Examine source code of Tab Color Quiz

{
  "manifest_version": 2,
  "name": "Tab Color Quiz",
  "version": "1.0",
  "description": "Quick memory quiz: tab flashes 3 colors, then asks which was last.",
  "browser_action": {
    "default_title": "Tab Color Quiz",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tabcolorquiz@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}