No. 1: Littlefox for Firefox

There are a number of great "mini" themes out there. The goal is to maximize screen space, making it ideal for viewing large pictures or videos with your browser. I'm sticking to the one that I use the most: Littlefox for Firefox by Alfred Kayser.

One of my favorite touches is the gear icons for my little bookmarklets. It's clever like a Littlefox, and I'm sticking with it...for now.