Try to use the chosen font within the "Popup font" input box #21
Description
Would look cool if we rendered the name of the popup font (i.e. the value for the "popup font" setting) with the chosen font. Would also make it easier to see whether the font is loading correctly from a local font file or WebFont, without having to save the setting to get the preview popup to appear. You could just preview it within the settings box.
Maybe when you start tweaking popup settings, we should permanently open a preview popup. That's a little indulgent for such a tiny extension, and this is a pretty obscure setting. Could be pretty easy though.