Examine source code of Metaverse

{
  "name": "Metaverse",
  "version": "1.0.7",
  "manifest_version": 2,
  "description": "Easily navigate the Metaverse.",
  "web_accessible_resources": [
    "popup.html",
    "popup.js"
  ],
  "icons": {
    "16": "icon16x16.png",
    "48": "icon48x48.png",
    "128": "icon128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://nftworld.io/*"
      ],
      "js": [
        "popup.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Metaverse",
    "default_icon": "icon128x128.png"
  }
}