Examine source code of MetaForge

{
  "manifest_version": 3,
  "name": "Metaforge",
  "version": "1.0.0",
  "description": "Official Metaforge extension for handling OAuth callbacks on metaforge.app",
  "icons": {
    "128": "assets/logo.png"
  },
  "permissions": [
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "http://127.0.0.1/*",
    "https://metaforge.app/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://metaforge.app/*"
      ],
      "js": [
        "presence.js"
      ],
      "run_at": "document_start"
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "metaforge@metaforge.app",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}