I switched my blog over to self hosted fonts the other day; that helper made it so easy. Do notice the tabs and checkboxes, it has many options.
One thing I see is that it by default includes specific support for IE6-IE9, IOS before v5, android before v4.4 which definitely should not be the default these days. It should be an option, but not the default.
Creator here. Yeah, you can possibly switch to "Modern Browsers" by now. Haven't touched this project in a while...