New visual indicator for Unsafe Browser in Windows 8 camouflage?

In the Unsafe Browser’s design document we have:

Set the default navigation bar search engine to English Wikipedia.
This will serve as a visual indicator that the Unsafe Browser is
being used, which will be especially useful when Windows camouflage
is activated since the scary colored theme is disabled.

However, the Iceweasel theme we apply in the Windows 8 camouflage, which we also apply to the Unsafe Browser then, has no search bar, because there’s no such thing in Internet Explorer 10. I say we simply drop this part of the design.

The question is what kind of “visual indicator” we can replace it with, if any. How important do we think this has been for our users so far? Can we just drop it all together?

Parent Task: #7329 (closed)

Original created by @anonym on 7395 (Redmine)