Examine source code of XToTwitter

{
  "manifest_version": 2,
  "name": "XToTwitter",
  "version": "1.3",
  "description": "Changes X urls to Twitter urls in the clipboard.",
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://x.com/*",
        "*://twitter.com/*"
      ],
      "js": [
        "XToTwitter.js"
      ]
    }
  ],
  "permissions": [
    "clipboardRead",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{17a551b9-a693-473a-b3be-c76976cfb2ab}"
    }
  }
}