textarea element. On the client side, it has been developed with all major browsers in mind, and supports Internet Explorer, Mozilla Firefox, Google Chrome, Safari, and Opera. It can even be used in the old and notoriously bug-ridden Internet Explorer 6!
CKEditor browser compatibility is managed according to the Graded Browser Support model proposed by Yahoo!, with some exceptions specific for the requirements of our audience and accessibility needs.
See the CKEditor Compatibility article for a full and up-to-date list of currently supported browsers.