UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36

Steps to reproduce the problem:
1. Press F12 to open dev tools
2. Click the ... in top right, choose settings.
3. No where in settings (as described by Stack overflow and Google posts) is there an option for blackboxing scripts. Nor is there a context menu (as also mentioned across the internet) when on the Sources tab and right clicking on a JS file.

What is the expected behavior?
I'd expect to see options to configure script blackboxing.

What went wrong?
As a result of this option for some reason not being there despite screenshots and lots of posts showing/mentioning it I can't blackbox jQuery JS file and hence in order to easily find out what is going on I either have to install an extension, press F11 a lot of search the JS code and hope it finds something.

Did this work before? N/A 

Chrome version: 54.0.2840.99  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0