Examine source code of Kiay-Shortener

{
  "manifest_version": 2,
  "name": "URL-Shortener",
  "short_name": "URL-Shortener",
  "description": "URL Shortener is a tool to shorten a long link and create a short URL and QR-Code easy to share on sites, chat and emails. Track short URL traffic and manage your links.",
  "icons": {
    "48": "icons/icon_48.png",
    "512": "icons/icon_512.png"
  },
  "version": "1.0.0",
  "permissions": [
    "downloads"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "48": "icons/icon_48.png",
      "512": "icons/icon_512.png"
    },
    "default_title": "URL-Shortener",
    "default_popup": "/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{70bde571-6663-4bf4-9a6e-974fe7a4061a}"
    }
  }
}