Examine source code of Steam Rep

{
  "manifest_version": 3,
  "name": "Steam Rep",
  "version": "2.2.1",
  "description": "Give and check Steam users' reputation points.",
  "icons": {
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png"
  },
  "action": {
    "default_icon": {
      "48": "icons/logo-48.png",
      "96": "icons/logo-96.png"
    },
    "default_title": "Steam Rep",
    "default_popup": "popup/login.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c8399f36-15ae-4517-ad15-0699cf5cdd14}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "authenticationInfo"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/images/*",
        "/icons/*"
      ],
      "matches": [
        "*://steamcommunity.com/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "service-worker.js"
    ],
    "service_worker": "service-worker.js"
  },
  "content_scripts": [
    {
      "matches": [
        "*://steamcommunity.com/profiles/*",
        "*://steamcommunity.com/id/*",
        "*://probot.servehttp.com/steam-rep/openid/*"
      ],
      "js": [
        "steam-rep.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://probot.servehttp.com/steam-rep/*"
  ]
}