I use IE, but since I followed chrisg's advice and put on Active X filtering , I have not had a single advert appear for several weeks now!! I am entirely "advert-free"!
However, just to see what you are all talking about... I tried accessing this site using Google Chrome - adverts everywhere! and yes, the Tesco on IS a nightmare ! (I too suffer from migraines, Mamya, and certainly wouldn't be able to cope with this......)
Back to IE and my Active X filtering - thanks again, chrisg!