Examine source code of Tab Title Quiz

{
  "manifest_version": 2,
  "name": "Tab Title Quiz",
  "version": "1.0.0",
  "description": "Show a quick quiz question in the tab title when opening a new tab. Click the tab to reveal the answer.",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tabtitlequiz@addon.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}