Ok, thank you very much

Thank you, I tried with crosswalk https://crosswalk-project.org/ and it works, maybe native WebView doesn't support WebGL. I have an Asus Zenfon 2.

I tried to put a blend4web project in a iframe in cordova app, but I have this error:

B4W ERROR: WebGL context lost

Loading stopped to 16%.
What is the best way to use blend4web in cordova? I would like to see an example app.
Thank you in advance.