I have started to have this problem where if I have opened Chrome Browser and have FireFox open at the same time FireFox becomes unresponsive and just sits there 'loading' the pages of whatever site I am trying to view. This only happens when I open Chrome. FireFox hasn't become unresponsive like the system resources are being used up and like it has frozen but it is just all of the tabs I want to view have the dot flipping back and forth trying to load the websites. My only way to fix this is to reboot my PC and open FireFox but not open Chrome at all and then FireFox works fine and loads everything quickly as expected but as soon as I open Chrome (which works fine even if FireFox is open) this issue starts. It doesn't fix it is I completed force close Chrome either and it will only work again if I reboot the PC. This has only just started happening over the past few days though so I am wondering if some sort of updat has occurred which has broken things as previously I could use both broswers no problem.