Macbook pro late 2011 10.8.5 using firefox and sometimes chrome and rarely safari Awhile ago I had to replace my hard drive. Since then, my internet searches are always plastered with ads and it seems to be getting worse and worse. I have tried a few things, but nothing seems to fix the problem. It didn't do this at all before I replaced my hard drive. I have to navigate all over the place around ads to read an article. What the heck.