DaveRo
Well-Known Member
The built-in Firefox pop-up blocker only blocks 'conventional' pop-ups - that is new windows created on top of (or sometimes underneath) a webpage. Most other browsers have a similar pop-up blocking setting. I haven't seen this Aldi advert but from people's descriptions it's probably a 'hover ad' which is part of the same webpage and floats or spills over the rest of the page.Firefox gives you the option to block pop-up windows.
Tools - Options - Content, then tick the box.
http://kb.mozillazine.org/Popups_not_blocked
(That page looks rather old!)