UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36

Steps to reproduce the problem:
0. Open DevTools and make a request
1. Open Network Tab, and click the Headers sub tab 
2. Navigate to the Request Headers, or Response Headers
3. Double click on the Key or the Value.

What is the expected behavior?
It should select only the key or only the value, in their entirety. 

What went wrong?
Sometimes when selecting the key or the value it will select part or whole of the value when selecting the key, or part/whole of the key when selecting the value.

Did this work before? N/A 

Chrome version: 60.0.3112.90  Channel: n/a
OS Version: OS X 10.12.6
Flash Version: Shockwave Flash 26.0 r0

This has been the Bane of my existence. I can't believe this is still a problem in 2017, and that no one has either reported it or fixed it. I would be eternally in debt to the one who fixed it.