Examine source code of PC To Phone

{
  "name": "PC To Phone",
  "description": "A browser extension that lets you scan (via a smartphone) a dynamically generated QR code for a webpage in your browser, and open the link directly on mobile, within seconds! No linking of devices or login required.",
  "version": "1.0.0",
  "manifest_version": 2,
  "icons": {
    "48": "./icon.svg"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "./icon.svg",
    "default_title": "Show QR Code to Scan",
    "default_popup": "popup.html"
  }
}