Latest Flash Player doesn't work on Safari no matter how many times I download it but it works just fine on Firefox

I am using Safari version 7.0 on my iMac. Am on Mavericks OS X 10.9. Safari is always prompting me to download the latest version of Adobe Flash Player. I have done this now have Version 11.4 but still unable to get it to work on Safari. If I use FireFox, there never is a problem. What can I do to make the Flash Player function while using Safari?