This is the only theme on AMO which actually improves on the default Firefox theme from a usability perspective. Instead of being flashy, this version of Qute uses well-designed icons that are easy to identify yet don't draw attention away from the active web site. For instance, the 'bookmarked' icon in the address bar is red when selected, grey when not. This makes it much easier to identify when the icon is selected, in every other theme, including the default Firefox theme, I must squint to deternine the state. Thank you!