Examine source code of npmx-redirect

{
  "icons": {
    "16": "icon16.plasmo.2577fc03.png",
    "32": "icon32.plasmo.d583dc1e.png",
    "48": "icon48.plasmo.e0fcfb1d.png",
    "64": "icon64.plasmo.e6259081.png",
    "128": "icon128.plasmo.96a1ede9.png"
  },
  "manifest_version": 3,
  "action": {
    "default_icon": {
      "16": "icon16.plasmo.2577fc03.png",
      "32": "icon32.plasmo.d583dc1e.png",
      "48": "icon48.plasmo.e0fcfb1d.png",
      "64": "icon64.plasmo.e6259081.png",
      "128": "icon128.plasmo.96a1ede9.png"
    },
    "default_popup": "popup.html"
  },
  "version": "0.2.0",
  "author": "Daniel Raybone <me@danielraybone.com>",
  "name": "Npmx redirect",
  "description": "Simple extension to redirect npmjs.com to npmx.dev",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "permissions": [
    "storage",
    "webNavigation",
    "declarativeNetRequest"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.npmjs.com/*"
      ],
      "js": [
        "content.0f79c1f7.js"
      ],
      "run_at": "document_start",
      "css": []
    }
  ],
  "host_permissions": [
    "*://*.npmjs.com/*"
  ],
  "omnibox": {
    "keyword": "npmx"
  },
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "orgs",
        "enabled": true,
        "path": "orgs.5b918cf7.json"
      },
      {
        "id": "packages",
        "enabled": true,
        "path": "packages.ec98a4df.json"
      },
      {
        "id": "search",
        "enabled": true,
        "path": "search.7593890d.json"
      },
      {
        "id": "users",
        "enabled": true,
        "path": "users.cb31705e.json"
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d98a3d21-7503-47d7-8973-f236945af2aa}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}