Examine source code of Tiny QRCode Builder

{
  "manifest_version": 2,
  "name": "Tiny QRCode Builder",
  "version": "1.1.6resigned1",
  "description": "Covert url to QR code.",
  "homepage_url": "https://github.com/webpatch/Tiny-QRCode-Builder",
  "icons": {
    "48": "icons/qr-code@1.5x.png",
    "96": "icons/qr-code@3x.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/qr-code.png",
    "default_title": "Tiny QRCode Builder",
    "default_popup": "popup/qr-code.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e37243c-d42e-4b8f-83eb-f7472f146f5f}"
    }
  }
}