How much do the roundness of icons affect user perception and acceptance of a chrome app? Absolutely and totally! From a recent experience in modifying the Jade Editor icon so that the corners did not have oversized curves, the answer is that it is best for icons to fit with their surroundings, blending into them.

The increased number of installations since its modification gives credence to the hypothesis. A simple change in changing the corner radius to 4 instead of a large number made it fit in with icons from the Google pack.