UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Steps to reproduce the problem:
1. Instanciate more than 16 WebGL canvas at the same time

What is the expected behavior?
No limitation or we can change the max

What went wrong?
We can't use more than 16 canvas WebGl at the same time

Did this work before? No 

Chrome version: 60.0.3112.113  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

We use for displaying videos through WebSocket to a video wall. We need to apply different effect on each canvas.