Privacy.popups.disable from plugins
From MozillaZine Knowledge Base
To get around the default popup blocker, some sites use Flash or Java applets to open unrequested windows. This preference controls popups initiated by plugins.
Possible values and their effects
No restrictions on plugin initiated popups.
Limit the number of plugin initiated popups to value defined in dom.popup_maximum. (even with popup blocker disabled)
Block all plugin initiated popups. (whitelisted sites will still be able to open popups) (Default in Firefox 1.5 and above and SeaMonkey)
Block all plugin initiated popups, even those on whitelisted sites.
First checked in
Has an effect in