Examine source code of FontHunter

{
  "manifest_version": 3,
  "name": "FontHunter",
  "version": "1.1",
  "description": "Detects and downloads all web fonts from any webpage with live previews",
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "tabs",
    "webRequest"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "FontHunter"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "fonthunter@clmnnt.dev",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}