Display a little sample chunk of a web font in much the same way that the google fonts page does, because I have a whole bunch of web fonts that I want to use, but I forget what they all look like. (and I’d rather not have to manage a large set of local copies)
Just a heads up, as of Obsidian v1.5.x, Google Fonts ( @import url("https://fonts.googleapis.com... ) are the only external URLs that are allowed. Didn’t want you pulling your hair out trying a different domain.