Disable pop-up blocker globally (for all users) in FF 30+

Hello, I cannot find the correct settings to disable pop-up blocker globally. I have some internal web apps that are using pop-ups to display certain information. By default FF is blocking all. Although it is indicating that pop-up was blocked many users do not notice the notification. I need to disable globally the pop-up blocker once for all, so users on particular computers can access the data without such problems. What is the about:config setting for that?

best regards salata