Right-click each icon below and "Save image as..." to download:
icon-72.png (72x72)
icon-96.png (96x96)
icon-128.png (128x128)
icon-144.png (144x144)
icon-152.png (152x152)
icon-192.png (192x192)
icon-384.png (384x384)
icon-512.png (512x512)
logo.png (32x32)