edit: from the horse's mouths https://code.google.com/p/chromium/issues/detail?id=457492
edit2: you can install this
https://chrome.google.com/webstore/detail/webrtc-leak-preven...
and test here:
https://diafygi.github.io/webrtc-ips/
though google sure seems to be dragging their feet on this so I'm sure they'll break this workaround soon
If you go read the bug you linked to, you can see that we added code to Chrome to specifically make this extension possible. It's in many CLs, but here is an example of one:
https://chromium.googlesource.com/chromium/src/+/7c98bab0212...
Further, we recently open sourced our own version of the extension and put it on github:
https://github.com/webrtc/samples/tree/master/src/content/ex...
And we intend to keep this advanced control, and perhaps more in the future, well-supported long-term.
Disabling Javascript and Plugins is much easier in Chrome than in Firefox.