Examine source code of NinerRatings

{
  "manifest_version": 3,
  "name": "NinerRatings",
  "version": "1.1.4",
  "description": "Firefox extension that embeds RateMyProfessors data directly into UNCC course registration portal.",
  "author": "contact@zagog629.8shield.net",
  "homepage_url": "https://github.com/zagog629/NinerRatings-Firefox",
  "browser_specific_settings": {
    "gecko": {
      "id": "contact@zagog629.8shield.net",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://selfservice.uncc.edu/StudentRegistrationSsb/*"
      ],
      "js": [
        "extension/content.js"
      ],
      "css": [
        "extension/content.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "extension/rmp.js"
    ]
  },
  "host_permissions": [
    "https://www.ratemyprofessors.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "fonts/*"
      ],
      "matches": [
        "*://selfservice.uncc.edu/*"
      ]
    }
  ],
  "icons": {
    "16": "icons/logo16px.png",
    "48": "icons/logo48px.png",
    "128": "icons/logo128px.png"
  }
}