You can easily view your HTML pages in Komodo using Browser Preview feature, or preview CSS files with a HTML file to change styles and see your changes in real time.
But as for me, I’m using Auto Reload add-on for Firefox, it reloads the page if a file in the directory you binded for a domain has changed.
Note you could easily use auto-reload in Komodo preview as well, either using one of the numerous solutions around using javascript or by creating a small Komodo macro.