Examine source code of MyHordes Enhancer

{
  "manifest_version": 2,
  "name": "MyHordes Enhancer",
  "short_name": "MHE",
  "version": "1.0.34",
  "description": "MyHordes Enhancer improves your game experience on MyHordes Based on Die2Nite_Enhancer created by Aymeric BEAUMET.",
  "developer": {
    "name": "Ludofloria / Shaitan <contact@chehtan.dev>",
    "url": "https://chehtan.dev"
  },
  "homepage_url": "https://depot.vwa.re/ludofloria/myhordes-enhancer/",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://myhordes.eu/*",
        "*://myhordes.de/*",
        "*://myhord.es/*",
        "*://www.zombvival.de/myhordes/*",
        "*://localhost/*"
      ],
      "js": [
        "compiled.js"
      ]
    }
  ],
  "permissions": [
    "*://chatty.d2ne.beaumet.me/*",
    "*://MH.duskdawn.net/*",
    "*://die2nite.gamerz.org.uk/*",
    "*://bbh.fred26.fr/*",
    "*://hordes-la-loi.fr/*",
    "*://gest-hordes2.eragaming.fr/*",
    "*://data.zenoo.fr/*",
    "*://qaz.wtf/*",
    "notifications"
  ],
  "applications": {
    "gecko": {
      "id": "jid1-bTAmRdxiqQRANQ@beaumet.me"
    }
  },
  "web_accessible_resources": [
    "images/*"
  ]
}