Examine source code of BoilerKey Helper

{
  "manifest_version": 2,
  "name": "BoilerKey Helper",
  "description": "An extension that alleviates Purdue's BoilerKey two-factor authentication.",
  "author": "The Purdue Community",
  "version": "1.11.1",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://purdue.brightspace.com/*",
        "https://www.purdue.edu/apps/account/cas/*"
      ],
      "js": [
        "jsOTP.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon128.png",
    "default_title": "BoilerKey Helper",
    "default_popup": "popup.html"
  },
  "permissions": [
    "https://api-1b9bef70.duosecurity.com/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b7673806-fdb7-4c8b-a8a5-3b3c017693b4}"
    }
  }
}