Examine source code of Goat - private short links for teams

{
  "manifest_version": 2,
  "name": "Goat",
  "description": "Goat is a great way to share links easily within your organization. It is a private URL shortener for teams, and often known as go links. Links can only be accessed by other members of your team. This extension adds support for go links in your address bar (an account on Goat is required, sign up for free!). Note: We request permissions for common search engines to ensure that we can redirect all your go links.",
  "version": "0.6.2",
  "icons": {
    "16": "logo-16.png",
    "48": "logo-48.png",
    "128": "logo-128.png"
  },
  "omnibox": {
    "keyword": "go"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://go/*",
    "*://*.goatcodes.com/*",
    "*://*.google.com/*",
    "*://*.bing.com/*",
    "*://*.duckduckgo.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://goatcodes.com/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "main.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a5163a9c-1865-4dd3-91a5-6592a6672cb1}"
    }
  }
}