1512801 - Site prevents me to close the tab/window with popups and full screen

Status: RESOLVED DUPLICATE of bug 377496

(Firefox :: Security, defect)

Description

[Guo Yunhe]

Attachment: Screenshot_2018-12-08_15-53-53.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:63.0) Gecko/20100101 Firefox/63.0

Steps to reproduce:

When I was browsing some site, a pop up ad window appear, the page address begins http://mainlink.cool/

At first I think it is just an annoying advertise site and I want to close it. However, I cannot.

Check the screenshot in attachment.

At first, it is opened full screen mode. With some fake Windows dialog (I am using Linux so I know it is fake), it tried to let me install their extensions. Then I press ESC to exit full screen.

I click the close button of tab or window, but it doesn't work because it has this login dialog.

I click close button of the login dialog or cancel button. Then the dialog will appear again.

I click the Don't allow button of extension installation pop over, but it seems not clickable.

I killed the Firefox process, which is the only solution for me.