When previewing HTML documents created or edited in CuteFTP Pro's built-in editor you will see the documents in your computer's default browser, unless you specify a different browser.
On the menu bar, click Tools > Global Options.
Expand Helper Applications and HTML Editor.
Click on Folders.
If you want to use the computer's default browser, select the Preview using the default browser checkbox and skip to step 6.
OR
If you want to use a different browser, clear the Preview using the default browser checkbox and continue with step 5.
In the Browser path box, browse or type the path to the program you want to use for previews of HTML.
Click OK.
Choosing folders for HTML snippets and scripts
Choosing display colors for the HTML editor