I don’t really like the new design, because
• too much design, too few information. A lot of blank and wasted space
• No separation between products. What if I’m only interested in Thunderbird?
• Probably still no way to list a lot of extensions with short descriptions to get an overview. Too much clicking, too much wasted time.
• Filesize would be nice, at least on the details page
• No releasedate information

Generally spoken: this goes solely in the direction “fancy” but it should mainly go in the direction “userfriendly” and “informative” (nothing against fancy, of course).