Examine source code of QR Code Generator Revival

{
  "manifest_version": 2,
  "name": "QR Code Generator Revival",
  "description": "Firefox search extension for generate QR codes.",
  "version": "1.0",
  "icons": {
    "16": "icon-16.png",
    "64": "icon-64.png"
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "QrCode Generator",
      "search_url": "https://api.qrserver.com/v1/create-qr-code?data={searchTerms}&margin=0&qzone=1",
      "encoding": "utf-8",
      "keyword": "qr",
      "favicon_url": "http://goqr.me/favicon.ico"
    }
  }
}