Handcrafted Our blog about HTML prototyping, craftsmanship, and designing in the browser. Firebug offers a great way of doing on-the-fly CSS modifications right there where it matters: in the browser. It allows you to actually “design in the browser” which is part of the Quplo philosophy. The only problem is that CSS changes done in Firebug aren’t persistent, so you have to redo them in your editi