Examine source code of X Counter

{
  "manifest_version": 2,
  "name": "X Counter",
  "description": "Track your posts and replies on X (Twitter) in the last 24 hours",
  "version": "0.0.2",
  "icons": {
    "16": "/16.png",
    "32": "/32.png",
    "48": "/48.png",
    "128": "/128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "alarms",
    "notifications",
    "declarativeNetRequest",
    "webRequest",
    "webRequestBlocking",
    "*://x.com/*",
    "*://twitter.com/*"
  ],
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'",
  "web_accessible_resources": [
    "injected-main.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "x-counter@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "X Counter",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*",
        "*://x.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}