When I click on things that need to open a pop up nothing happens
All of a sudden when I click on part of a page that would open a small window for details or info, or like when I'm printing postage in PayPal and a new window should open with the label on it, nothing happens. My popup blocker is off. I uninstalled and reinstalled Firefox. I reset Firefox. There's no bar showing saying that anything was blocked. It's just nothing at all.
Opaite Mbohovái (1)
Which security software (firewall, anti-virus) do you have?
Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test to see if that helps.