Xinha Here! – All Releases: Your content management system doesn’t have WYSIWYG? No problem — here’s a Firefox extension to make any textarea a WYSIWYG HTML editor on-demand.
Xinha Here! is a wrapper for the Xinha HTML editor that enables WYSIWYG editing in any HTML textarea and text input elements. Xinha Here! opens Xinha editor on the client side. This allows you to edit the field data in a WYSIWYG editor on any website without coping and pasting to a secondary editor. To use Xinha Here! simply select Xinha Here! from the context menu of the desired textarea or text input element.
It actually pops up a new window with the editor, and there’s a button to “push” all your HTML back to the original window. Seems like a good way of doing it.