There are now a couple of security spoofs out there for Mozilla Firefox. Unlike IE there is an easy way to catch them that is not often mentioned.
Simply type in about:config into the address bar, then search for and change these settings to true:
dom.disable_window_open_feature.location dom.disable_window_open_feature.status dom.disable_window_open_feature.titlebar dom.disable_window_status_change
dom.disable_window_move_resize [good against user-initiated popups] dom.disable_window_open_feature.close dom.disable_window_open_feature.directories dom.disable_window_open_feature.menubar dom.disable_window_open_feature.minimizable dom.disable_window_open_feature.personalbar dom.disable_window_open_feature.resizable [handy against those tiny non-resizable popups too] dom.disable_window_open_feature.scrollbars dom.disable_window_open_feature.toolbar
Hope anybody thinks this useful. Of course, check out the "Web Features" settings dialog out first.