UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Steps to reproduce the problem:
1. Install any Chrome extension which provides a clickable icon in the browser's top UI
2. Set the top-chrome-md flag to "Normal"
3. Click on the chrome extension button

What is the expected behavior?
The chrome extension behaves normally

What went wrong?
The entire chrome browser (all windows) close and I see a crash report in Mac OS.

Crashed report ID: 1ca5ab7ab5b63542

How much crashed? Whole browser

Is it a problem with a plugin? N/A 

Did this work before? N/A 

Chrome version: 69.0.3497.100  Channel: stable
OS Version: OS X 10.12.6
Flash Version: 

Initially I thought this was specific to the LastPass chrome extension. I saw another user on Twitter who mentioned the same problem.

But today, I tested other Chrome extensions to see if it yielded similar results and yes it did.

https://twitter.com/jessegavin/status/1040086817725407232