Clarify which browsers can use the ligatures rather than arbitrary letters.

[tabatkins]

In your documentation, you say that in "modern browsers" ligatures are available, rather than having to use arbitrary characters. Which browsers are those?

If the set of modern browsers is sufficiently large, please update the suggested markup to use the ligatures instead, perhaps with a note that one can also use single letters to support legacy browsers.

[bpmarkowitz]

This is a good point. I will need to do some more research on this and get the documentation updated. I know the most recent versions of Safari, Chrome, and Firefox support ligatures.

[SevenBits]

Most recent Safari works.

[garak]

android browser does not work

[hasokeric]

yes which browsers does this work with (SVG)?