KompoZer uses the Gecko rendering engine (like Firefox 3.6). It does not support modern CSS Grid, Flexbox, or HTML5 semantic tags natively. It will display your design as a browser from 2010 would.
The original KompoZer project was maintained by volunteer developers (notably Fabien Cazenave) as a bug-fixed fork of the earlier Nvu editor. Development effectively ended around 2010. The domain kompozer.com was later acquired by third parties. www.kompozer.com download
Below is a deep, informative article about the history, risks, and alternatives related to the search term "www.kompozer.com download." KompoZer uses the Gecko rendering engine (like Firefox 3
If you want a visual HTML editor, consider these actively maintained tools: informative article about the history