Jen Simmons—Designer Advocate at Mozilla, creator of Firefox Grid Inspector, host of Layout Land and The Web Ahead, member of the CSS Working Group, coiner of Intrinsic Web Design, and general force of nature—is Jeffrey Zeldman’s guest.

Everything we thought we knew about web design just changed. Making sites that sing. Designing with the viewport in mind. A time-based storytelling journey. Real whitespace on the web. Real designer/developer tools: the Shapes Editor, Grid Inspector, and next-generation fonts panel in Firefox.