Examine source code of Magnet Checker

{
  "manifest_version": 3,
  "name": "Magnet Checker",
  "version": "1.0.0",
  "description": "Checks availability of magnet links using OpenWebTorrent API",
  "permissions": [
    "scripting",
    "activeTab"
  ],
  "host_permissions": [
    "https://checker.openwebtorrent.com/*",
    "http://checker.openwebtorrent.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_title": "Magnet Checker"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "magnet-checker@greygraygrey",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}