To block pop-ups from plugins, open your Firefox 1.0 or 1.0.1 browser, type about:config in the address field. Right-click in the resulting config page somewhere and select New -> Interger. Type privacy.popups.disable_from_plugins in the resulting dialog, hit OK, type 2 in the next dialog and you’re all set.
This pref can actually take three values:
- 0: open allowed
- 1: the opened windows are treated as popups, but they’re allowed to open (we limit the number of these types of popups)
- 2: the window is a popup, block it
In the image accompanying this entry, the preference is highlighted. This is the view you get when you enter “about:config” in the Firefox address bar (though yours won’t have the preference I’ve highlighted until you’ve added it). To add the preference, just right click anywhere in this screen and follow Asa’s instructions. So far, it’s worked great for me, and with no ill side effects.