Examine source code of x Multi Account Manager

{
  "manifest_version": 3,
  "name": "x Multi Account Manager",
  "version": "3.0.0",
  "description": "Xアカウントを高速切替",
  "permissions": [
    "cookies",
    "storage",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "x-account-switcher@your-domain.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*"
      ],
      "js": [
        "api.js",
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}