To enable the Firefox preview in the editor, you first you need to install Firefox then install the
program.
If you are using the portable version you can download a small tool called "FFTabInstall.exe"
found on the home site http://www.rj-texted.se/downlod.
The tool will install a few files in the
Firefox folder. Once installed you should see a Firefox tab, next to the IE preview tab, in the main
window.