UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Steps to reproduce the problem:
1. go to youtube or facebook or twitch
2. try to watch any video
3. within 5-10 seconds the tab should crash

What is the expected behavior?
i should be able to watch videos

What went wrong?
the browser tab crashes every time i try and watch a video

Crashed report ID: 83879980-3f5c-4298-8c5d-4345b85cf613

How much crashed? Just one tab

Is it a problem with a plugin? No 

Did this work before? Yes 

Chrome version: 61.0.3163.100  Channel: stable
OS Version: OS X 10.12.6
Flash Version: