In the last few days, an irritating web-site that changes its name constantly appears whenever I do a Google search. It seems to be linked to whatever choice I make in google, as after I click my choice it always goes to this site. How do I remove this site. It advertises porn and I don't want to see it! I use Firefox and have run defenderPro. Sometimes the site appears as fast-loans.org., sometimes as casinocaesar.com etc