I have Flash Player 11 Plugin & ActiveX. I normally use Firefox v. 19.0.2 (I can't right now because of the problem I'm about to describe). Everytime I close FF, & at half the pages I visit (regardless of whether they include flash content), I get a message saying Adobe Flash Player has crashed. It happens constantly.
I correctly reinstalled Flash Player 11 to no avail. I tried to go back to 10.3, as your site suggests, but my PC absolutely barred me from doing that because it isn't the latest version. The problem clearly isn't with the version or installation of Flash Player. I have added a large number of plugins in recent weeks, but none that would seem to overlap with this one.
Can you help?