Examine source code of HTB new UI fixer

{
  "manifest_version": 3,
  "name": "HTB new UI fixer",
  "version": "1.1",
  "description": "A firefox add-on that fixes narrow lesson text card and make it wide, and improves the text/background contrast.",
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a9c7b3f-1e4d-4a8f-9c2d-8b5f6e3a1d8c}",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://academy.hackthebox.com/*",
        "*://*.academy.hackthebox.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_end"
    }
  ]
}