Examine source code of UWorld Answer Viewer

{
  "name": "UWorld Answer Viewer",
  "version": "1.0.2",
  "description": "An extension to render content from UWorld practice tests in simple HTML",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://apps.uworld.com/courseapp/*/testinterface/launchtest/*"
      ],
      "js": [
        "text_grab.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a7682250-72ba-4918-8fd6-e5c5f61d29e7}"
    }
  }
}