UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36

Steps to reproduce the problem:
1. Download the example file attached (or go to a website which uses this trick to scare users, for example: http://qrb37.voluumtrk1ng.com/a195fa41-e127-489f-a439-4c26a1d4/?subid=&pubfeed=70377 )
2. Click anywhere on the page
3. Try to exit fullscreen by pressing esc

What is the expected behavior?

What went wrong?
A webpage can use "document.addEventListener('keyup', event => document.documentElement.webkitRequestFullscreen());" to prevent a user to exit full screen by making the page fullscreen again as soon as they let go of the esc key. The only way to get out of such a page is to hold down esc and close the page at the same time (but maybe that too might be blocked using keydown?).

A solution would be either to block webkitRequestFullscreen from being called from inside an esc key event, or not send any event at all when esc is pressed to exit fullscreen.

Did this work before? N/A 

Chrome version: 54.0.2840.99  Channel: n/a
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0