Examine source code of Go Redirect

{
  "manifest_version": 3,
  "name": "Go Redirect",
  "version": "1.0.2",
  "description": "Redirect http://go/<path> and https://go/<path> to https://go.geniussports.dev/<path>",
  "content_scripts": [
    {
      "matches": [
        "http://go/*",
        "https://go/*"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png",
    "256": "icons/icon256.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "permissions": [
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "http://go/*",
    "https://go/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "go_redirects",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "go-redirect@geniussports.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "description": "This extension redirects URLs from go/* to go.geniussports.dev/*. No data is collected, stored, or transmitted.",
        "required": [
          "none"
        ]
      }
    }
  }
}