Your devices use a Rockchip SOC which I believe has a Mali 200/400 GPU, while its ok, this particular GPU IRC is blacklisted by Chrome for WebGL so that is why it crashes.
Although another user reported to me it crashed, but he uninstall and reinstall and suddenly it works. So there you go..
As for CJS, have you tried your game on Samsung Tablets? Or Samsung Notes, or S2/S3 phones?
CJS has hardware conflicts with bigger brands. This is for my Star Nomad with CJS:
I got about 20 beta testers on Reddit who crashed with CJS try my XDK version and they said it ran beautifully.
This is one of the major reasons moving forward, for Android, I'll focus on XDK.