Examine source code of SSC Classic

{
  "manifest_version": 2,
  "name": "SSC Classic",
  "version": "0.553",
  "content_scripts": [
    {
      "matches": [
        "https://www.skyscrapercity.com/*"
      ],
      "css": [
        "ssc.css"
      ],
      "js": [
        "jquery-3.4.1.min.js",
        "ssc.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{467fd62c-8009-4a0f-8eae-a225668711a7}"
    }
  }
}