Examine source code of HuCacheTools

{
  "name": "HuCacheTools",
  "description": "Extends the functionality of geocaching.hu",
  "version": "0.2.0",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": [
        "*://geocaching.hu/geomap/*"
      ],
      "js": [
        "gm.js"
      ],
      "css": [
        "gm.css"
      ]
    }
  ],
  "host_permissions": [
    "*://geocaching.hu/geomap/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "gm_functions.js",
        "gm_others.js",
        "lib/togpx.js",
        "lib/parser.js"
      ],
      "matches": [
        "*://geocaching.hu/*"
      ]
    }
  ],
  "icons": {
    "16": "/images/hucachetools16.png",
    "32": "/images/hucachetools32.png",
    "48": "/images/hucachetools48.png",
    "128": "/images/hucachetools128.png"
  },
  "homepage_url": "https://github.com/andrashann/hucachetools",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b5aa3a46-e4a1-4f0e-8df7-610025b1e92c}"
    }
  }
}