Hello bobre, sorry but it is not possible to block all pop ups ! for definitely better results try : Adblock Plus add-on

thank you

I am having this issue too, and it's becoming very annoying. I didn't change anything, however, on every system I have with Firefox, I am not ONLY getting pop-ups (and I didn't used to), but pages go into a perpetual load, even when the page is already fully loaded. I have to actually hit the stop icon (i.e., the 'x'). What the hell happened?? There is clearly something going around affecting Firefox browsers, as a couple people I know are experiencing the same thing. Again, we haven't changed anything.