UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3449.0 Safari/537.36

Steps to reproduce the problem:
1. click an extensions page/browser action that has a popup

What is the expected behavior?
to render and display the content

What went wrong?
no rendering, showing a blank/black page

WebStore page: 

Did this work before? Yes I don't know, a very recent version/build of canary

Chrome version: 69.0.3449.0  Channel: n/a
OS Version: 10.0
Flash Version: 

same chrome canary version/build as in  issue 849220 , I submitted yesterday.
it worked two days ago if not yesterday, it might be the same browser launch instance since a relaunched after I took the screenshots in  issue 849220 .
I have 278 tabs open.
same PC, same settings and graphics card as in  issue 849220 .
 

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