Firefox popup blocker
Thursday, January 13, 2011 6:50:17 PM
Those "allowed" events are listed in "about:config" -> "dom.popup_allowed_events" and by default they are "change click dblclick mouseup reset submit".
There are several extensions for blocking popups and you find them on "addons.mozilla.org" site but you can just manually change the above settings by deleting or adding JS events in the above list.
To reset everything to the default settings, right click on "dom.popup_allowed_events" (changed "about:config" settings appear in bold) and then click on "reset".