Examine source code of SRDC Enhanced

{
  "description": "Enhances speedrun.com user pages with race results",
  "manifest_version": 2,
  "name": "SRDC Enhanced",
  "version": "0.3resigned1",
  "homepage_url": "https://habs.sdf.org/srapi/",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.speedrun.com/*"
      ],
      "js": [
        "jquery-3.3.1.min.js",
        "enhance.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{34c87763-8cea-408b-a519-62a667f49b66}"
    }
  }
}