VULNERABILITY DETAILS
Normally a user should be able to leave Fullscreen Mode by pressing ESC or F11.

However some scammers seem to have found a way to use JavaScript to force the user back into fullscreen mode upon leaving it, making it difficult for some users to escape the scam.

VERSION
Google Chrome	52.0.2743.116 (Official Build) m (32-bit)
Revision	9115ecad1cae66fd5fe52bd9120af643384fd6f3-refs/branch-heads/2743@{#728}
OS	Windows 10

REPRODUCTION CASE
The source code and relevant JavaScript is here: http://paste2.org/UPDmgWht
Original URL:
[http]://game99playgame99boxp[dot]club/newpince/crr_rre/index.html