Examine source code of IBOV Real-Time Tracker

{
  "manifest_version": 2,
  "name": "IBOV Real-Time Tracker",
  "version": "1.0.0",
  "description": "Real-time IBOVESPA index tracker with visual indicators",
  "browser_specific_settings": {
    "gecko": {
      "id": "ibov-tracker@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "alarms",
    "https://query1.finance.yahoo.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "IBOV Index",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png"
  }
}