Examine source code of better hokie spa

{
  "manifest_version": 2,
  "name": "VTModernify",
  "version": "1.1",
  "description": "Modernizes the HokieSpa website!",
  "permissions": [
    "tabs"
  ],
  "icons": {
    "128": "128.png"
  },
  "web_accessible_resources": [],
  "content_scripts": [
    {
      "matches": [
        "https://apps.es.vt.edu/ssb/*",
        "https://dvlp.apps.es.vt.edu/*"
      ],
      "css": [
        "Development/web_defaultapp.css"
      ],
      "js": [
        "content.js",
        "injectHTML.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "HTML.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c8b463a7-9be5-4a40-9326-ca54bbe2191f}"
    }
  }
}