UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Steps to reproduce the problem:
1. html5gamepad.com
2. press a button, it should show your Gamepad
3. open another tab and html5gamepad.com
4. press a button, it should show your Gamepad
5. Go back to original tab, note that the timestamps updated

What is the expected behavior?
I expect that the background tab did not receive updated Gamepad data as the tab wasn't focused/active.

What went wrong?
I don't expect two tabs to be able to get my Gamepad input simultaneously. Other browsers, namely Edge, restrict access to the Gamepad to the active tab. I have not yet tested iframe scenarios within the same tab, but it would seem that might be broken as well.

With WebVR our primary input model is a Gamepad so making sure that the input of the Gamepad is secure will be important to establishing a user trust model.

Did this work before? No 

Chrome version: 52.0.2743.116  Channel: n/a
OS Version: 10.0
Flash Version: Shockwave Flash 22.0 r0

I recall looking at this in Edge/IE years ago and I'm pretty sure at that time, the same bug existed in Chrome and Edge/IE decided to take a more restrictive approach.