I'm using firefox and when I try to connect to certain websites it says in the lower right hand corner "connecting to ad.doubleclick.net" for what seems like an age. I have tried connecting to the same website with safari and it also does not connect. My internet works fine and I can surf the web great, I just cannot seem to connect to a few sites. I checked out this problem on google and it seems like it is caused by some sort of spyware/virus and while I have found out the solution for windows based systems, I alas have a mac. So if anyone can provide me with any sort of solution to this it would be greatly appreciated.