Hi! I've been getting a lot of weird ads lately on my mac (2011 13 inch Air osx 10.8) Often when I click on link, a new tab opens with an ad in it. (and my WOT extension which rates how safe a site is flags it) This had just started in the last couple of weeks or so. First it happened on just one site (a TV show reviewing website) , which I thought was the problem. But now it's happening on my Google searches as well! Or on Goodreads, basically everywhere except for Facebook. I have AdBlock installed, and I've deleted my cookies and cached images from the last month. Anyway I can fix this? Is my mac in danger? Hope you can help! Thanks.