Welcome to the past! 👻
Unfortunately, FCKeditor is no longer maintained. RIP ❤️
Or, you can discover CKEditor 4, which is an enterprise-grade WYSIWYG editor with countless features and wide browser compatibility including the legacy ones.
This is a minor update release, targeted to the release of FCKeditor.Net 2.5. It impacts mainly ASP.NET developers. Changes to the code are minimal, to make it safe upgrading from FCKeditor 2.5.