Chrome Version       : 71.0.3578.27
OS Version: 11151.17.0
URLs (if applicable) : docs.google.com
Other browsers tested: N/A

What steps will reproduce the problem?
1. Install uBlock Origin or uMatrix.
2. Go to docs.google.com
3. Open the popup menu for uMatrix.

What is the expected result?
The grid of domains and allowed resources opens.
Similar to https://user-images.githubusercontent.com/585534/33516656-707e44c2-d744-11e7-83ec-7d8761265f01.png

What happens instead of that?
The popup just says: "No web page found"

UserAgentString: Mozilla/5.0 (X11; CrOS x86_64 11151.17.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.27 Safari/537.36