Hmm. I got a problem. Every time I try to turn on the screen, or open it's GUI to set a webpage, it crashes minecraft with a short description: Ticking Entity.
Here is the crashlog: https://pastebin.com/gWGEVKCq
I'm using minecraft version 1.7.10 to use this mod.
Windows 10 x64 bit
I use MCEF 1.7.10-06.jar it works best.