now it worth at least 4.5 stars Rated 4 out of 5 stars

thank you for you quick reply. It work as the title promised now. here are the final question: how about this add-on's efficiency? It make not much sense if it severely slow down the browser (so far, no significent slow down I could notice, but nice to hear the writer confirms that)

This review is for a previous version of the add-on (0.1.8).  This user has other reviews of this add-on.

I doesn't have any effect on regular browsing. Only when a pop-up is opened it has to check the url against Adblock's lists which takes maybe couple of milliseconds, but that's nothing compared to time that Adblock has to use to check all the elements on every page load. So I whould say you cannot notice any slowdown.