Examine source code of xEnhancer - Twitter Stats

{
  "manifest_version": 3,
  "version": "1.4.0",
  "name": "xEnhancer - Twitter Stats",
  "description": "Shows follower/following stats and follow-back probability on X.com (Twitter) without hovering",
  "action": {
    "default_popup": "src/pages/popup/index.html",
    "default_icon": {
      "32": "icon-32.png"
    }
  },
  "icons": {
    "128": "icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "xenhancer-twitter-stats@xenhancer.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "js": [
        "assets/index.tsx-eDIeCYDN.js"
      ],
      "matches": [
        "*://x.com/*",
        "*://twitter.com/*",
        "*://www.x.com/*",
        "*://www.twitter.com/*"
      ],
      "css": [
        "contentStyle.css"
      ],
      "run_at": "document_end"
    }
  ],
  "devtools_page": "src/pages/devtools/index.html",
  "web_accessible_resources": [
    {
      "matches": [],
      "resources": [
        "contentStyle.css",
        "icon.png",
        "icon-32.png",
        "icon-128.png"
      ]
    },
    {
      "matches": [
        "*://twitter.com/*",
        "*://www.twitter.com/*",
        "*://www.x.com/*",
        "*://x.com/*"
      ],
      "resources": [
        "assets/index.tsx-eDIeCYDN.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "type": "module"
  }
}