Hi, Just updated the latest firefox and its running my XP machine at 100% on the CPU. It was fine before this. The only thing I have done different was to install Imacros but I have deleted this now. I cant see any strange processes running at all. Its just 100% on Firefox and it crawls along now. Anyone have the same or an idea what the problem is? I have run malwarebytes and all is clean according to it. Thanks !!