Things in Firefox look good. So do videos.

Made a few more firefox-specific fixes. Apparently Chrome won't make
things fake bold, which looks nice. Firefox does, if you ask it too. And
by default, Firefox headings are bold. I thought the CSS reset would take
care of that. At any rate, firefox looks the same now, which is nice.

Also, I use the fitVid library to make videos look nice and full-width.