Be careful with ligatures in Web pages. They have downsides, which might not initially be apparent.

Ligatures are their own font characters. That is, an s-t font ligature is not recognized as an s and a t except visually. So, some things break:

1) search of text. "step" become a font-dependent codepoint followed by "tep"

2) accessibility for handicapped users. Readers generally cannot correctly translate ligatures.

3) browsers do not guarantee to handle your ligature correctly, especially older versions of browsers.

So, for the small increment in esthetics, you're creating a small pile of annoyances for readers and affecting the ability to find docs on your site via search engines.

For these reasons, you don't frequently find ligatures in Web pages.