Cavendish
The Mozilla Foundation has just switched to a new design called Cavendish. It’s nice, sleek, and – best of all – blue. (Like someone over at mozillaZine said, “I’m a sucker for blue.”)
I had a lot of fun being nitpicky and trying to find less-than-perfect parts of the design when it was still in beta. And since the design’s creators are still open to feedback, I’m looking forward to finding more nits to pick! :^)
A new website design probably won’t be your only reason to switch to Firefox and Thunderbird, but this one will definitely help you decide!