Adrian Holovaty is a good guy. I even got the firm to fly him out here for a weekend.
Something tells me his Mozilla extension to fix All Music Guide is going to stir up a heap of trouble. It's your browser, but their content, so are you allowed to hack that last micron to your display screen? Lawyers are getting lathered up somewhere is my guess. Shades of Third Voice and it's ilk, the major change being that Mozilla/Firefox is much more easily (although not trivially) extended. If Mozilla ever retakes the world, look for a lot more hacks like this.