UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3516.0 Safari/537.36

Steps to reproduce the problem:
1. Not sure if reproducable, just keep browser on for some days
2. 
3. 

What is the expected behavior?
normal chrome screen

What went wrong?
Entire screen became black

Did this work before? N/A 

Chrome version: 70.0.3516.0  Channel: n/a
OS Version: OS X 10.13.6
Flash Version:
 

Deleted: Screen Shot 2018-08-09 at 11.30.38 PM.png 628 KB

	Screen Shot 2018-08-09 at 11.30.38 PM.png 628 KB View Download