If you want to play with the Editor, you have to install the entire Mozilla package. That's because the Editor uses many of the other modules, such as layout and xpfe, and therefore is very much integrated with the rest of the suite. The Mozilla Editor is currently a tool for creating noncomplex, content-heavy web documents. The tables support is excellent, as I touched upon earlier. But I would not, for example, use it for a forms-heavy site.
Unicode support is part of the project's overall commitment to internationalization.
Currently, the Editor supports both Latin and Korean character insertions. This capability is also built into the user interface. Cross-platform and areas of use The Mozilla Editor runs on any platform that Mozilla runs on, which is quite a few. Functionality contained within the Editor module of the Mozilla source code is currently being used in other areas of the Mozilla package. Apart from Composer, the mail and news functions use it to compose HTML messages.