Firefox could not be installed

[y2ng]

Firefox Version: 153.1.0esr
System: Windows 7 Professional Service Pack 1
VxKex: 1.2.1.2229

Activate VxKex for this program is checked before installation.

It pops up a window with a "x" icon, nothing else.

Would you please take a look at this and make it possible for Firefox users?
Thank you! @i486