UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36

Steps to reproduce the problem:
1. Set policy EnableMediaRouter to false (or otherwise prevent the media router extension from being loaded) and restart the browser.
2. Go to YouTube and play any video.

What is the expected behavior?

What went wrong?
If developers tools is closed when the video page is loaded you'll get errors like:

> Failed to load resource: net::ERR_FAILED chrome-extension://invalid/

If developers tools is open when the page is loaded the errors will be like

> GET chrome-extension://invalid/ net::ERR_FAILED chrome-extension://invalid/:1

or

> GET chrome-extension://invalid/ net::ERR_FAILED remote.js:10

The net::ERR_XYZ errors are misleading because the script is looking for a local resource rather than trying to load something over HTTP or FTP.  The particular error "GET chrome-extension://invalid/ net::ERR_FAILED chrome-extension://invalid/:1" because the "chrome-extension://invalid/:1" makes it sound like the error happened inside of the missing extension.

Did this work before? No 

Chrome version: 61.0.3163.79  Channel: stable
OS Version: Fedora 25
Flash Version: Shockwave Flash 26.0 r0