Examine source code of NFTBlocker for Twitter

{
  "manifest_version": 2,
  "name": "NFTBlocker for Twitter",
  "description": "This extension automatically block anyone who has a hexagon-shaped profile picture (NFT bros).",
  "version": "1.0.1",
  "applications": {
    "gecko": {
      "id": "hexagon_blocker@extension"
    }
  },
  "icons": {
    "48": "icons/border-48.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "options.html",
    "default_icon": {
      "16": "icons/page-16.png",
      "32": "icons/page-32.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*",
        "https://mobile.twitter.com/*"
      ],
      "js": [
        "main_script.js"
      ]
    }
  ]
}