There could be an issue with using Titles as the key to blocking things.
Over at Mail.com, a lot of their popups are titled "email.com" and that's it. In fact, the popup content will often be a single image, not text (don't know if that makes a difference)
Would AdStop be able to distinguish which "email.com" windows I wanted and which not?
That is what seems to be the great feature behind adjusting the script settings in Mozilla. It referred to not opening "Unrequested" windows. So, I guess if you don't click for it, it won't open.
Found a prob with the Mozilla, though. If you click a link designed to open in a popup, it still blocks it. So, the designation, "unrequested" is not really accurate. Even though I deliberately click a link that I had configured to open in a newwin, the bugger didn't open.

This could be a serious issue with things like shopping carts.
.....
I went into a mail.com account. The mail didn't open in a popup.
However, if I right-clicked, "This Frame", Open frame in new tab....doggone, the mail links now open in new windows even though I still have the open unrequested windows unchecked.....oh, well....
What would be really nice is if you could toggle this feature right on the toolbar. Then, you could easily click back and forth depending on your circumstances.