Examine source code of aQRate

{
  "manifest_version": 2,
  "name": "aQRate",
  "version": "1.0",
  "description": "Get the current URL as a QR code or HTML tag.",
  "homepage_url": "https://github.com/Joelmmm/aQRate.git",
  "icons": {
    "32": "icons/qr-32.png",
    "48": "icons/qr-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "./background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/qr-32.png",
    "default_title": "aQRate",
    "default_popup": "aQRate.html"
  }
}