Examine source code of TecnoMap Extension

{
  "manifest_version": 3,
  "name": "TecnoMap Extension",
  "version": "1.0.0",
  "description": "An extension that redirects some BlueMap requests to your game to get your personal data.",
  "permissions": [
    "activeTab"
  ],
  "host_permissions": [
    "https://mappa.tecnocraft.net/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "assets/tecnomap-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://mappa.tecnocraft.net/*"
      ],
      "js": [
        "scripts/content.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    }
  ],
  "icons": {
    "16": "assets/tecnomap-16.png",
    "48": "assets/tecnomap-48.png",
    "128": "assets/tecnomap-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tecnomap@reloia.it"
    }
  }
}