UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:51.0) Gecko/20100101 Firefox/51.0

Example URL:
http://jsbin.com/kujikikive/edit?html,js,output

Steps to reproduce the problem:
1. Open the URL
2. Click the 'Run with JS' button in the Output panel
3. 

What is the expected behavior?
A non-zero 'left' value of getBoundingClientRect is displayed.

What went wrong?
The return value of getBoundingClientRect is {top: 0, bottom: 0, left: 0, right: 0}.
On Safari and Firefox, it returns correct non-zero values.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes 

Chrome version: 54.0.2832.2 (Official Build) canary (64 bit)  Channel: canary
OS Version: OS X 10.11
Flash Version: