If you're a Firefox user, what theme do you use? The default or a custom one? I used to use "Aquatint Redone" but now I use Chromifox.
I used to use Vista Aero theme, which im sure looks like IE somewhat. I dont bother with themes anymore, I am stuck with default
I use Vista Aero because I find that the default them sucks when you have more than a dozen tabs open at once. Also have a couple of other addons for the user interface as well. They hide the menubar and free up space, make Firefox use Aero Glass window borders and move the page load progress bar into the address bar. I also use an addon called Tabkit which allows me to group and color tabs. I can also expand and collapse groups with clicks when I need most space on the tab bar.
I just use the default theme, and I never quite got why I should make the effort to get a custom theme for a simple internet browser.