Examine source code of URL Share with QR Code

{
  "manifest_version": 2,
  "name": "QR Code Generator",
  "version": "1.0",
  "description": "This extension generates a QR code for the active tab's URL.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "QR Code Generator",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3bec4ea0-c9fe-42fa-87ef-abf4d929ad79}"
    }
  }
}