Examine source code of X(Twitter) Adjuster

{
  "manifest_version": 3,
  "name": "X(Twitter) Adjuster",
  "version": "1.3.0",
  "description": "X(Twitter)ホーム画面の初期表示をオプションで指定したタブにします。リストを固定しておき、初期表示をそのリストにすることができます。",
  "icons": {
    "16": "icon/icon16.png",
    "32": "icon/icon32.png",
    "48": "icon/icon48.png",
    "128": "icon/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f569f55c-6111-46bf-b848-19efd6e91f37}",
      "strict_min_version": "109.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*",
        "*://*.x.com/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  }
}