I'm using Mozilla, Windows 7.
Once a PM notice pops up on screen, the entire browser freezes. I am unable to exit the box, close the browser entirely, or even look at other tabs.
Been happening for about the past week, as far as I know.
Scan the computer for viruses?
fire fox up to the latest version?
Try chrome? :D
No viruses. Browser up to date.
I've just disabled the pop-up function for now.