I have seen same problem posted, but no resolution that has worked for me. On some sites, once I click on a link (once), I have to click the back button 2-3 times to get back to the page I was originally on. If I right click on the back button, I see that 2-3 copies of the linked page are in the back button history. This happens a lot on cbsnews.com. If I click on a photo list on that site, it will load 2-3 copies of every single picture that I look at. I have tried running firefox in safe mode, but the same thing happens. If I visit the site using Chrome, it does not happen. This has been happening since version 29.0; I am currently running 31.0 for windows (8.1).