I haven't used the new one yet, but the old one had a superior tab interface to everything out there, which they called MDI (Multiple Document Interface). For

I haven't used the new one yet, but the old one had a superior tab interface to everything out there, which they called MDI (Multiple Document Interface). For serial tab abusers like myself, it was a noticeable difference that always had me scratching my head why the other browsers didn't copy the idea.