Comment 2 for bug 857627

I would recommend adding a different colour highlight border around the edge of the active one, and removing the colour border around all of the other ones, so the only one with a colour border is the active one. It's hard to tell from the attached screenshot, but for example Firefox will have a dark orange background and bright orange border.

Change it so the current active one has some colour border (perhaps light orange to go with the brown background), and all the other icons have no border (so Firefox will still have a dark orange background but no orange border).