Comment 4 for bug 165521

Yes, font support is much better in 0.38, but I'm not
closing this because it only covers CSS-supported variants,
while styles such as Outline or Alternate will still likely
fail. More work is needed to support arbitrary style names.

As for changing styles by hotkeys, sure, it will be done
when we have a normal text selection implemented (as opposed
to just applying the style to the entire text object).