HTX communicates with your WWW browser using a remote control mechanism which is different for each browser. At the time of writing, the method used by Mosaic is somewhat faster and more flexible, but the technology is still evolving and both Mosaic and Netscape have some limitations in this area.
In general, if you use only one machine at a time and never start up more than one copy of your browser, you are unlikely to have problems. However, if you use multiple machines or multiple browsers, the following describes some of the browser-specific behaviour you may need to be aware of.