UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Example URL:
https://economics.ubc.ca/files/2013/05/pdf_paper_nicole-fortin-decomposition-methods.pdf

Steps to reproduce the problem:
1. Open any pdf in the browser 

What is the expected behavior?
Load and view pdf without issue

What went wrong?
1. PDF loads, for about 5 seconds either works normally or is frozen
2. Screen goes white in the tab.
3. Switching tabs and coming back remedies the problem, the pdf is instantly viewable again

Does it occur on multiple sites: Yes

Is it a problem with a plugin? N/A 

Did this work before? Yes Unsure, this is a fairly recent occurance

Does this work in other browsers? Yes

Chrome version: 68.0.3440.106  Channel: stable
OS Version: OS X 10.13.6
Flash Version: