Have a proper web browser with this KoBox extension. A bit laggy at first but it becomes fast after a few minutes of loading (be patient!)
Available here:
http://23.163.0.39/bundles/kobox/extensions/
Connect USB cable, go in KoBox settings -> Export extensions storage then drag-and-drop
midori.isa and
midori.isa.dgst files in the drive from your computer.
You can launch it by first enabling and connecting to a Wi-Fi network (optional but not much can be done without that ;p), then going in KoBox apps -> Midori. Then,
wait. The screen may stay blank for several minutes. The onboard keyboard will eventually show up, too.
Enjoy!